TY - THES A1 - Tiebe, Carlo T1 - Detektion leicht flüchtiger organischer Verbindungen mikrobiellen Ursprungs (MVOC) mittels Ionenmobilitätsspektrometrie (IMS) N2 - Spuren leicht flüchtiger organischer Verbindungen mikrobiellen Ursprungs (MVOC) in der Luft von Innenräumen können das Vorhandensein von Schimmelpilzen indizieren. Die Anwendung der Ionenmobilitätsspektrometrie (IMS) zur Detektion von leicht flüchtigen schimmelpilzspezifischenVerbindungen ist wegen ihrer hohen Empfindlichkeit viel versprechend. Um dieses analytisch-chemische Verfahren für eine Innenraumdiagnostik zu nutzen, wurde ein mobil einsetzbares Gerät zur Vor-Ort-Detektion getestet. Im ersten Teil der Arbeit wurden MVOC-Prüfgase im Labor generiert. Die Prüfgase wurden durch permeative Beimengungen in einen definierten Gasstrom hergestellt. Anhand dieser Prüfgase wurden die typischen IMS-Parameter, wie reduzierte Mobilität (K0), relative Driftzeit (trd), Konzentrationsabhängigkeit der Signale und daraus resultierend die Nachweisgrenze des Ionenmobilitätsspektrometer ermittelt. Die bestimmten Nachweisgrenzen der 14 untersuchten MVOC liegen im Bereich zwischen 2 und 192 μg m-3 (1 bis 51 ppbV). Im zweiten Teil wurden sieben oft im Innenraum nachgewiesene Schimmelpilzarten auf Nährmedien kultiviert und ihre produzierten MVOC detektiert. Dabei wurde festgestellt, dass Schimmelpilze art- und altersabhängige MVOC-Emissionen aufweisen. Eine statistische Auswertung und Bestätigung zeigte die Anwendung der Hauptkomponentenanalyse (PCA). Versuchsbegleitend erfolgte eine Identifizierung der MVOC durch gaschromatographische Analysen und bestätigte die IMS-Ergebnisse. Beim Schimmelpilzwachstum einer Mischsporenkultur auf drei verschiedenen Baumaterialien wurden die produzierten MVOC detektiert. Die IMS-Spektren wurden chemometrisch durch eine PCA ausgewertet. Es können die Spektren von unbeimpften und mit Schimmelpilzkulturen beimpften Baumaterialien damit unterscheiden werden ohne die stoffliche Zusammensetzung der Emissionskammerluft zu kennen. Im letzten Teil dieser Arbeit wurde das IMS in 27 Feldversuchen eingesetzt, um MVOC und damit ein Schimmelpilzwachstum in Innenräumen zu detektieren. In 59 % der Fälle wurde eine positive Korrelation zwischen einem sichtbaren Schimmelpilzbefall und den mittels IMS detektierten MVOC ermittelt. N2 - Traces of microbial volatile organic compounds (MVOCs) can indicate the growth of moulds in the indoor air. The application of ion mobility spectrometry (IMS) is a very promising method for the detection of these MVOCs due to its high sensitivity. A mobile IMS device was tested to use this analytical-chemical method for in situ indoor air diagnostics. The first part of this work describes the test gas generation of 14 MVOCs in the laboratory. The test gases were produced by preparation of permeation procedures. Due to the MVOCs test gases IMS parameters like reduced mobility (K0), relative drift time (trd), the concentration dependency of MVOCs signals were determined and the limit of detection (LOD) was calculated. The LODs are in the range of 2 to 192 μg m-3 (1 to 51 ppbV). In the second part of this manuscript seven different mould species were cultivated on nutrient media and their MVOCs emissions were explored. It was found out, that the MVOCs emissions of moulds have a dependency of species and of their cultivation time. These results are confirmed by principal component analysis (PCA). The identification of These MVOCs was performed by test-related GC-MS analysis and approved these results. The MVOCs emissions were explored in the cultivation of mould mixtures on three different building materials. The IMS-results were interpreted chemo metrically by PCA. It was possible to find different emission patterns of cultivated moulds on building materials without an identification of the MVOCs inside the emission chamber. In 27 field trials of different indoor environments (rooms) the IMS was tested to detect MVOCs. In 59 % of the cases a positive correlation is determined between visible mouldinfested rooms and the detected MVOCs by IMS. T3 - BAM Dissertationsreihe - 67 KW - IMS KW - Hauptkomponentenanalyse KW - Schimmelpilze KW - Ionenmobilitätsspektrometrie KW - MVOC PY - 2010 UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-919 SN - 978-3-9813853-1-1 SN - 1613-4249 VL - 67 SP - 1 EP - 171 PB - Bundesanstalt für Materialforschung und -prüfung (BAM) CY - Berlin AN - OPUS4-91 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Gawlitza, Kornelia A1 - Bartelmeß, Jürgen A1 - Bartholmai, Matthias A1 - Neumann, Patrick P. A1 - Johann, Sergej A1 - Tiebe, Carlo T1 - Fluorescence sensor for the long-term monitoring of gaseous ammonia N2 - Ammonia and its reaction products can cause considerable damage of human health and ecosystems, increasing the necessity for reliable and reversible sensors to monitor traces of gaseous ammonia in ambient air directly on-site or in the field. Although various types of gas sensors are available, fluorescence sensors have gained importance due to advantages such as high sensitivity and facile miniaturization. Here, we present the development of a sensor material for the detection of gaseous ammonia in the lower ppm to ppb range by incorporation of a fluorescent dye, which shows reversible fluorescence modulations as a function of analyte concentration, into a polymer matrix to ensure the accumulation of ammonia. A gas standard generator producing standard gas mixtures, which comply with the metrological traceability in the desired environmentally relevant measurement range, was used to calibrate the optical sensor system. To integrate the sensor material into a mobile device, a prototype of a hand-held instrument was developed, enabling straightforward data acquisition over a long period. T2 - Colloquium of Optical Spectrometry (COSP) 2017 CY - Berlin, Germany DA - 27.11.2017 KW - Ammonia gas sensor KW - Fluorescence KW - Air quality monitoring KW - Standard gas generator KW - Miniaturized sensor device PY - 2017 AN - OPUS4-43143 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Moufid, M. A1 - Tiebe, Carlo A1 - El Bari, N. A1 - Bartholmai, Matthias A1 - Bouchikhi, B. T1 - Advance in electronic nose technology developed for the detection and discrimination of ethanol, ammonia, and hydrogen sulfide gases N2 - This work focuses on the design and fabrication of low-cost and fast-response of an electronic nose (E-nose) based on semiconductor gas sensors, for discriminating some synthetic gases such as ammonia (NH3), ethanol (C2H5OH), and hydrogen sulfide (H2S). Additionally, the capability of separating different concentration levels of each considered gases was checked. Dataset treatment of E-nose by using Principal Component Analysis (PCA) showed a good discrimination of the different synthetic gases. Furthermore, perfect classification was reached of different concentration levels of the analysed gases by using Discriminant Function Analysis (DFA). In the light of these results, it could be stated that the developed E-nose system constitutes an inexpensive, rapid, simple to use, and efficient tool for synthetic gases detection. T2 - IEEE International Symposium on Olfaction and Electronic Nose (ISOEN) CY - Aveiro, Portugal DA - 29.05.2022 KW - Electronic nose KW - Metal oxide semiconductor KW - Chemometric techniques KW - Environmental analysis PY - 2022 SN - 978-1-6654-5860-3 DO - https://doi.org/10.1109/ISOEN54820.2022.9789636 SP - 1 EP - 3 AN - OPUS4-56574 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Tiebe, Carlo A1 - Banach, Ulrich A1 - Hübert, Thomas A1 - Gawlitza, Kornelia A1 - Bartholmai, Matthias T1 - Development of a gas standard generator N2 - Pollution through emission of toxic gases is an increasing problem for the environment. It affects similarly agricultural, industrial and urban areas. In future, environmental emissions in ambient air must be monitored at even lower concentrations as nowadays. One environmental relevant compound is ammonia and its conversion product ammonium that have strong negative impact on human health and ecosystems. Most ammonia measurements in ambient air are performed in the range below 1000 nmol·mol-1 and thus there is a need for reliable traceable ammonia gas standards and in addition in situ analytical procedures for monitoring (in ambient air to avoid that thresholds are exceeded). Therefore, the use of reference materials is necessary for development accompanying test or for calibration, e. g. of structure-integrated sensors and mobile multi-gas sensors. The developed gas standard generator produces gas mixtures that comply with the metrological traceability for ammonia gas standards in the desired environmentally relevant measurement range. The method is based on the permeation of ammonia through a membrane at constant temperature and pressure. The resulting ammonia penetrant gas flow is then mixed with a carrier gas flow to generate a gas standard flow of known concentration. The dynamic rage is enlarged by using a two dilution steps. Depending on the permeation rate, generable molar fractions are possible in the range nmol·mol-1 to a few µmol·mol-1. We present the design of an ammonia gas standard generator and first results of the characterisation of its individual components supporting the uncertainty assessment according to GUM for stable gas concentrations in this range. The relative uncertainty of the generated ammonia gas standard is smaller than 4 % (k = 2). T2 - Colloquium of Optical Spectrometry (COSP) CY - Berlin, Germany DA - 27.11.2017 KW - Gas standard generator KW - Permeation method KW - Ammonia PY - 2017 AN - OPUS4-43337 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Tiebe, Carlo A1 - Bayat, Mehmet E. T1 - Measurement and Testing Methods for Sensors in Hydrogen Technologies N2 - To ensure accurate results, it is advisable to conduct sensor testing under controlled conditions, focusing on identifying specific properties and quantifying performance criteria. The necessity of these evaluations lies in determining if a potentially beneficial sensor is a good fit for a specific application. Devices are typically factory-calibrated in according to ISO/IEC 17025, followed by testing/validation prior to intended use. Subsequent inspections/validations performance tests and long-term stability should be repeated in appropriate intervals. We present the testing and calibration validation of a hydrogen sensor intended for safety applications, using dynamic dilution of hydrogen into clean, dry air. • Sensor testing for the determination of non-explosive gas mixture composition, response time and characteristic curves of gas sensors, gas measuring devices. • Hydrogen mole fraction: 100 μmol/mol to > 4.0 cmol/mol – (approximately equal to 0.1 Vol-% to > 4.0 Vol-%) • Humidity: frost-point temperatures in the range of -85 °C to 15 °C (equal to 0.2 μmol/mol to 17000 μmol/mol humidity mole fraction) at ambient pressure • Sensor output provided directly in hydrogen volume percent, as defined by the factory calibration. The results obtained from the device under test demonstrate the effectiveness of the evaluated gas sensor in detecting and quantifying hydrogen. Its responses to different amounts of hydrogen in air and reliably returns to zero. To quantify the generated hydrogen mole fractions in situ and in operando, a process-GC-TCD-TCD system calibrated against our primary gas standards was used, ensuring the highest accuracy as a designated institute for primary gas standards. This procedure provides a foundation for modern and efficient quality assurance of gas sensors. T2 - 2025 IARIA Annual Congress on Frontiers in Science, Technology, Services, and Applications CY - Venice, Italy DA - 06.07.2025 KW - Hydrogen KW - Sensor KW - Quality KW - Validation KW - Data analysis KW - Reference procedure PY - 2025 AN - OPUS4-64047 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Tahri, K. A1 - Tiebe, Carlo A1 - El Bari, N. A1 - Hübert, Thomas A1 - Bouchikhi, B. T1 - Geographical provenience differentiation and adulteration detection of cumin by means of electronic sensing Systems and SPME-GC-MS in combination with different chemometric approaches N2 - The detection of the aroma and flavour volatile compounds of spices is key in product quality control. Accordingly, it is necessary to develop new electronic sensing systems for food adulteration control and authenticity assessment for protecting customer's health. In this work, the capability of the E-nose and VE-tongue in combination with SPME-GC-MS to correctly discriminate between several cumin samples of different geographical origins and to detect their adulteration, by using unsupervised and supervised chemometric tools, was evaluated. Regarding the aroma profile, eleven volatile compounds were characterized by SPME-GC-MS; all of them were found in cumin powder while only eight are found in cumin seeds. The main volatile compounds detected were b-pinene, m-cymene, g-terpinene, cuminaldehyde and cuminic alcohol, in different proportions depending on the cumin sample form (seed or powder). In summary, the results obtained are sufficiently encouraging as a starting point for the development of new electronic sensing systems with more improvement in the reliability of the sensor's performance as well as chemometric tools in order to deal with a complex dataset. KW - Voltammetric electronic tongue KW - Electronic nose KW - SPME-GC-MS KW - Chemometric tool KW - Cumin discrimination KW - Geographical origins KW - Adulteration detection PY - 2016 DO - https://doi.org/10.1039/c6ay01906d SN - 1759-9660 VL - 8 IS - 42 SP - 7638 EP - 7649 PB - RCS AN - OPUS4-38558 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Tiebe, Carlo A1 - Bartholmai, Matthias T1 - Two tasks in environmental monitoring - calibration and characterization of gas sensors and remote sensing with multicopter platforms - Part 2 N2 - Emissions of ammonia into the environment are mainly caused by agriculture, but also by combustion processes in waste and by road traffic. Even at low concentrations, this substance is not only an odour nuisance, but also a substance with ecological and climatic relevance. Therefore, BAM tested commercial electrochemical, and metal oxide based sensors, which have limited suitability for measuring in the environmental molar fraction range. Alternatively, own developments for the detection of ammonia in the trace range were implemented, wherein the analyte is measured by changing the fluorescence of a BODIPY dye at 550 nm by means of a portable fluorescence sensor directly from the gas phase. For the calibration of ammonia sensors and measuring instruments, a stationary system based on the mixture of certified test gases from pressure cylinders with calibrated mass flow controllers is available. A test gas generator was developed for on-site calibration and testing of sensors and measuring devices. The generation of ammonia-containing gases in the environmental relevant range of levels below 1000 nmol/mol is carried out by the permeation method according to ISO 6145-10. For the traceability of ammonia, standards are provided and further developed by the National Metrological Institutes and designated institutes. Metrological standards are based on SI units and are a basis for traceability of sensors or gas analysers. T2 - Aarhus University, Department of Environmental Science, External seminar with Matthias Bartholmai and Carlo Tiebe CY - Roskilde, Denmark DA - 29.08.2018 KW - Environmental monitoring KW - Test gas generation KW - Fluorescence sensor KW - Ammonia PY - 2018 AN - OPUS4-45842 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Johann, Sergej A1 - Baensch, Franziska A1 - Strurm, Patrick A1 - Tiebe, Carlo A1 - Pötschke, Samuel A1 - Lay, Vera ED - Hall, H. T1 - HF RFID-based Measurement Comparison for Method Optimization in M2 Concrete and Alkali-Activated Mortars N2 - The internal project "SealWasteSafe" of the Federal Institute for Materials Research and Testing is dedicated to the further improvement in the construction of sealing systems for underground repositories of radioactive waste. Particularly, a multi-sensory concept is developed to ensure quality assurance and continuous long-term monitoring on the engineered barriers. Therefore, beside other measures, the temperature and equilibrium moisture of the construction shall be monitored and respective multi-sensoric monitoring concepts are tested first on the laboratory scale. One focus in this project is on embedded application in alkali-activated mortars (AAM), which results in special requirements for the resistance of the sensors to strongly alkaline environments with up to pH 14. In addition, the ingress of water along cables or at sensor positions is critical for sensors embedded in concrete, as the cable access of the sensor housing is a major weak point. It is therefore advisable to equip wireless high frequent radio frequency identification-based sensors, so called HF RFID sensors (short: RFID), that do not require cable access and thus have a stable and leak-proof sensor housing for long-term monitoring. In this contribution, the results from temperature, moisture and transmitted power monitoring of a AAM and a M2 specimens by means of HF RFID sensor systems are presented. T2 - 35th Danubia - Adria Symposium on Advances in Experimental Mechanics CY - Linz, Österreich DA - 21.09.2021 KW - Passive sensor interface KW - RFID KW - Structural Health Monitoring KW - Alkali-Activated Mortars PY - 2021 SN - 978-3-9504997-0-4 SP - 116 EP - 117 AN - OPUS4-53397 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Johann, Sergej A1 - Lapalus, Antoin A1 - Tiebe, Carlo A1 - Bartholmai, Matthias T1 - Design and Implementation of Smart Multisensor Monitoring System for Safe Workplaces with LoRaWAN N2 - This project addresses the application of safe workplaces in offices and chemical laboratories where indoor air quality plays an important role. The LoRaWAN (Long Range Wide Area Network) is used as a communication interface to make important sensor data globally accessible. The goal of the development is to create a sensor node and an online and offline solution that collects the data from the sensor nodes and stores it on a local server or in a cloud. In cooperation with the companies WISTA GmbH and IONOS, a test sensor network is going to be established in the Berlin-Adlershof area. T2 - SMSI 2020 CY - Meeting was canceled DA - 22.06.2020 KW - Smart sensors KW - Air quality monitoring KW - LoRaWAN KW - VOC KW - Multisensor system PY - 2020 DO - https://doi.org/10.5162/SMSI2020/E5.4 SP - 388 EP - 389 AN - OPUS4-50878 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Tiebe, Carlo A1 - Hübert, Thomas A1 - Rondeshagen, D. T1 - Ionen-Mobilitäts-Spektrometrie hilft bei der Kontrolle von Gewürzen N2 - Um Qualitätsschwankungen und -abweichungen in unterschiedlichenLieferchargen sowie Kontaminationen insbesondere an Pfeffer und Paprika zu detektieren, haben Forscher ein sensorgestütztes Monitoring mittels lonen-Mobilitäts-Spektrometrie (IMS) entwickelt. Gewürze werden wegen ihres Gehalts an natürlichen geschmacklichen und geruchsgebenden Inhaltsstoffen zur Verfeinerung von Speisen und Getränken verwendet. Dabei handelt es sich um Naturprodukte, die Schwankungen in ihrer bestimmungsgemäßen Qualität unterliegen. PY - 2014 UR - https://www.laborpraxis.vogel.de/analytik/spektroskopie-und-photometrie/articles/438502/ SN - 0344-1733 SN - 1610-8256 SP - 1 EP - 11 PB - Vogel CY - Würzburg AN - OPUS4-30922 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Gawlitza, Kornelia A1 - Tiebe, Carlo A1 - Banach, Ulrich A1 - Noske, Reinhard A1 - Bartholmai, Matthias A1 - Rurack, Knut T1 - Novel sensor for long-term monitoring of ammonia in gas phase N2 - Because ammonia and its reaction products can cause considerable damage to human health and ecosystems, there is a need for reliably operating and reversibly interacting sensor materials to monitor traces of gaseous ammonia in ambient air, which at best can be used on-site for in-the-field measurements. Herein, the development of a sensor material for gaseous ammonia in the lower ppm to ppb range using optical fluorescence as transduction mechanism is presented. A fluorescent dye, which shows reversible fluorescence enhancement in the presence of ammonia is incorporated into a polymer matrix, the latter to ensure the accumulation of ammonia. The sensor material is integrated into a prototype of a miniaturized sensor device, facilitating long-term operation. To calibrate the optical sensor system a gas standard generator, producing standard gas mixtures, is used, leading to a sensitivity down to lower ppm concentrations of ammonia. T2 - 13. Dresdner Sensor-Symposium 2017 CY - Dresden, Germany DA - 04.12.2017 KW - Ammonia gas sensor KW - Fluorescence KW - Air quality monitoring KW - Standard gas generator KW - Miniaturized sensor device PY - 2017 DO - https://doi.org/10.5162/13dss2017/P4.02 SP - P4.02, 272 EP - 276 AN - OPUS4-43352 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bartholmai, Matthias A1 - Neumann, Patrick P. A1 - Tiebe, Carlo A1 - Johann, Sergej T1 - Adaptable multi-sensor device for gas detection N2 - Innovation is the catalyst for the technology of the future. It is important to develop new and better technologies that can continuously monitor the environmental impact, e.g., for air Quality control or emission detection. In the recently at BAM developed Universal Pump Sensor Control (UPSC3) module, different components and sensors are fused. The combination of the individual components makes the UPSC3 module an excellent monitoring and reference system for the development and characterization of gas specific sensors. Measurements over long periods are possible, for mixed gas loads or for certain gas measurements. The System is part of a mobile sensor network of several sensor units, which can also be used as standalone systems. T2 - Networked Environmental Monitoring – from sensor principles to novel services CY - BAM, Berlin, Germany DA - 06.02.2018 KW - Environmental monitoring PY - 2018 AN - OPUS4-44077 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Detjens, Marc A1 - Tiebe, Carlo A1 - Banach, Ulrich A1 - Ritter, U. T1 - Ionic Liquid Based Coulometric Trace Humidity Sensors N2 - This work presents a first attempt to use ionic liquids as a new coating for planar coulometric sensors. These sensors are used for the measurement of trace humidity in various gases. Usually, the coating of the sensors is tetraphosphorus decaoxide and its hydrolysis products. Instead, a hygroscopic ionic liquid was used as sensor coating in this work. Generated frost point temperatures tf in the gas ranged from -80 °C to -30 °C, which is equivalent to vapour mole fractions xv from 0.5 μmol·mol-1 to 376 μmol·mol-1. In addition to the coulometric sensors, the generated humidity is determined by a precision dew point hygrometer as reference. First results show that it is possible to measure humidity with ionic liquid based coulometric sensors. T2 - ALLSENSOR 2018 CY - Rom, Italy DA - 25.03.2018 KW - Ionic liquids. KW - Coulometric sensors KW - Sensor coating KW - Trace humidity measurement PY - 2018 SN - 978-1-61208-621-7 SP - 13 EP - 14 PB - IARIA AN - OPUS4-44609 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Nattuveettil, Keerthana A1 - Liebner, Christian A1 - Tiebe, Carlo T1 - Hydrogen safety- Dealing with Closed Spaces N2 - Hydrogen is under discussion as a potentially clean energy source, but its safe usage and handling in enclosed environments remains a critical challenge due to the properties of hydrogen. This work focuses on detecting and monitoring hydrogen concentration in closed spaces to improve safety by developing a sensor network-based leak detection system to prevent of the accumulation of hazardous mixtures. Furthermore, the study details the implementation of a hydrogen sensor network within a container, analysing sensor placement, data collection, and safety improvements. The findings contribute to better risk assessment and enhanced safety protocols in hydrogen storage and usage facilities. T2 - SMSI 2025 CY - Nuremberg, Germany DA - 06.05.2025 KW - Sensor Network KW - Hydrogen safety KW - QI-Digital PY - 2025 UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-640630 SN - 978-3-910600-06-5 DO - https://doi.org/10.5162/SMSI2025/C6.2 SP - 167 EP - 168 PB - AMA Verband für Sensorik und Messtechnik e.V. CY - Berlin AN - OPUS4-64063 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Tiebe, Carlo A1 - Detjens, Marc A1 - Banach, Ulrich T1 - Messunsicherheiten von Feuchtesensoren N2 - Inhalt dieses Seminarbeitrags sind Hygrometer und Kenngrößen der Hygrometrie, Anforderungen an ein Prüflabor sowie die Bestimmung der Messunsicherheit bei der Prüfung von Feuchtesensoren wie auch Prüfung auf signifikante Abweichungen. T2 - 308. PTB-Seminar Berechnung der Messunsicherheit – Empfehlungen für die Praxis CY - Berlin, Germany DA - 15.03.2018 KW - Messunsicherheit KW - Feuchtesensor KW - Prüflabor PY - 2018 UR - https://www.ptb.de/cms/fileadmin/internet/fachabteilungen/abteilung_8/8.4_mathematische_modellierung/308._PTB_Seminar/Vortraege/4PraxisII/Messunsicherheiten_von_Feuchtesensoren.pdf AN - OPUS4-44546 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Moufid, M. A1 - Tiebe, Carlo A1 - El Bari, N. A1 - Hamada, D. A. A1 - Bartholmai, Matthias A1 - Bouchikhi, B. T1 - Pollution parameters evaluation of wastewater collected at different treatment stages from wastewater treatment plant based on E-nose and E-tongue systems combined with chemometric techniques N2 - Wastewater contains harmful chemicals and heavy metals that are known to cause various environmental and health problems. Therefore, the water quality control using sensitive, simple, fast, accurate, and portable tools is of great importance. This study aimed to evaluate the pollution parameters of wastewaters collected at different treatment stages from a wastewater treatment plant (WWTP) that treats domestic and industrial wastewaters by using an electronic nose (E-nose) and a voltammetric electronic tongue (E-tongue) combined with chemometric techniques. Water and wastewater pollution parameters determination were performed using inductively coupled plasma optical emission spectrometry for the determination of cations, and anions by using ion chromatography. Chemometric techniques, such as Principal Component Analysis (PCA), Discriminant Function Analysis (DFA), Support Vector Machines (SVMs), and Hierarchical Cluster Analysis (HCA), were used to process the E-nose and E-tongue datasets to describe the similarities between the samples. In addition, Partial Least Squares Regression (PLSR) model was constructed using electronic sensing data to simultaneously predict the concentration values of physicochemical parameters. The obtained correlation coefficient, for training and testing sets, is higher than 0.91 for the prediction of the concentration of all physicochemical parameters, except for iron (Fe) which remains 0.84. These results suggest that simple, portable, and inexpensive tools such as electronic nose and tongue are suitable for wastewater analysis. KW - Wastewater KW - Electronic nose KW - Voltammetric electronic tongue KW - Water quality control KW - Chemometric techniques KW - Gas sensing PY - 2022 DO - https://doi.org/10.1016/j.chemolab.2022.104593 VL - 227 SP - 1 EP - 12 PB - Elsevier B.V. AN - OPUS4-55652 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Tiebe, Carlo T1 - Novel mobile multi-gas sensor for ammonia detection in the environment N2 - Pollution through emission of toxic gases becomes an increasing problem for the environment in agricultural, industrial and urban areas. In future, environmental emissions as well as ambient air must be monitored at even lower concentrations as nowadays. Consequently, demands arouse for measuring concentrations as low as the lower ppm or even ppb range. Current state-of-the-art technologies, as for instance electrochemical sensors, have reached their limits in this regard. The developed ammonia gas standard generator produces standard gas mixtures which comply with the metrological traceability for ammonia gas standards in the desired environmentally relevant measurement range of e. g. 0.5 to 500 nmol/mol. This gas standard preparation method is based on the permeation of ammonia through a membrane at a constant temperature as well as the mixing of this permeated gas with a carrier gas to adjust a gas standard of known concentration. The ammonia gas standard is suitable for the calibration of standard optical methods, e. g cavity ring-down spectroscopy (CRDS) and multi-gas sensors. The detection of gaseous ammonia in the lower ppm or even ppb range is obtained by incorporation of a fluorescent dye, which shows fluorescence enhancement in the presence of the analyte, into a polymer support being responsible for the accumulation of the analyte. The use of optical fluorescence as transduction mechanism enables high sensitivity as well as high temporal resolution. Here, we present first results on such a sensor system including the use of the developed gas standard generator for calibration issues. Additional benefits, particularly of fluorescence-based sensors, are their capability for miniaturization and potential multiplex mode. Beside the development of a highly sensitive and selective sensor, the integration of such systems into mobile sensor devices is addressed. These sensors and sensor systems are developed and will be validated and operated in form of functional models for the application areas, structure-integrated sensors and mobile multi-gas sensors. T2 - 2nd MetNH3 workshop on ammonia measurement methodology CY - Bern, Switzerland DA - 09.05.2017 KW - Ammonia KW - Permeation KW - Gas standard preparation KW - Fluorescence-based sensors PY - 2017 AN - OPUS4-40206 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Tahri, K. A1 - Tiebe, Carlo A1 - El Bari, N. A1 - Hübert, Thomas A1 - Bouchikhi, B. T1 - Geographical classification and adulteration detection of cumin by using electronic sensing coupled to multivariate analysis N2 - The objective of this work is to report the improvement obtained in the discrimination of complex aroma and taste with subtle differences in odor and flavor, by the use of fast suitable procedures for the cases of measurements in the field demanding decision-making in real time. The proposed electronic sensing systems, formed by an E-nose and VE-tongue, were used to discriminate cumin cultivars from different geographical origins, as well as to quantify the cumin adulteration percentages by using unsupervised and supervised chemometric tools. Thus, the results obtained are sufficiently encouraging as a starting point for the development of new electronic sensing systems with more improvement such the reliability of the sensors’ performance as well as the chemometric tools in order to deal with a complex dataset. KW - VE-tongue KW - E-nose KW - Chemometric tools KW - Cumin discrimination KW - Geographical origins KW - Adulteration detection PY - 2017 UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-409735 DO - https://doi.org/10.1016/j.protcy.2017.04.102 SN - 2212-0173 VL - 27 SP - 240 EP - 241 PB - Elsevier B.V. AN - OPUS4-40973 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Schütze, A. A1 - Tiebe, Carlo T1 - Gas sensor characterization and calibration N2 - This seminar contribution contains the topics: 3S - sensitivity, selectivity and stability; sensor drift, aging and poisoning; influence of ambient conditions; gas mixing systems for sensor characterization and on-site field (re)calibration. T2 - Networked Environmental Monitoring – from sensor principles to novel services CY - BAM, Berlin, Germany DA - 06.02.2018 KW - Gas sensor KW - Gas mixing systems KW - Sensor characterization PY - 2018 AN - OPUS4-44088 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Banach, Ulrich A1 - Tiebe, Carlo A1 - Hübert, Thomas ED - Matteo Pardo, ED - Giorgio Sberveglieri, T1 - Application of electronic nose and ion mobility spectrometer to quality control of spice mixtures T2 - 13th International symposium on olfaction and electronic nose CY - Brescia, Italy DA - 2009-04-15 KW - Electronic nose KW - Ion mobility spectrometer KW - Spice mixtures KW - Product adulteration KW - Multivariate data analysis PY - 2009 SN - 978-0-7354-0674-2 N1 - Serientitel: AIP conference proceedings – Series title: AIP conference proceedings VL - 1137 SP - 301 EP - 302 AN - OPUS4-19572 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Tahri, K. A1 - Tiebe, Carlo A1 - Bougrini, M. A1 - Saidi, T. A1 - El Alami-El Hassani, N. A1 - El Bari, N. A1 - Hübert, Thomas A1 - Bouchikhi, B. T1 - Determination of safranal concentration in saffron samples by means of VE-tongue, SPME-GC-MS, UV-vis spectrophotometry and multivariate analysis N2 - An experimental investigation has been carried out to characterize and discriminate seven saffron samples and to verify their declared geographical origin using a voltammetric electronic tongue (VE-tongue). The ability of multivariable analysis methods such as Principal Component Analysis (PCA), Hierarchical Cluster Analysis (HCA) to classify the saffron samples according to their geographical origin have been investigated. A good discrimination has reached using PCA and HCA in the VE-tongue characterization case. Furthermore, cross validation and Partial Least Square (PLS) techniques were applied in order to build suitable management and prediction models for the determination of safranal concentration in saffron samples based on SPME-GC-MS and UV-Vis Spectrophotometry. The obtained results reveals that some relationships were established between the VE-tongue signal, SPMEGC-MS and UV-Vis spectrophotometry methods to predict safranal concentration levels in saffron samples by using the PLS model. In the light of these results, we can say that the proposed electronic system offer a fast, simple and efficient tool to recognize the declared geographical origin of the saffron samples. T2 - IEEE Sensor 2015 CY - Busan, South Korea DA - 01.11.2015 KW - Chemometrics KW - Voltammetric electronic tongue KW - SPME-GC-MS KW - UV-vis Spectrometry KW - Saffron KW - Geographic differentiation PY - 2015 SN - 978-1-4799-8202-8 VL - CFP15SEN-USB SP - 68 EP - 71 PB - IEEE CY - Piscataway AN - OPUS4-36545 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Hübert, Thomas A1 - Majewski, J. A1 - Banach, Ulrich A1 - Detjens, Marc A1 - Tiebe, Carlo T1 - Response Time Measurement of Hydrogen Sensors N2 - The efficiency of gas sensor application for facilitating the safe use of hydrogen depends considerably on the sensor response to a change in hydrogen concentration. Therefore, the response time has been measured for five different-type commercially available hydrogen sensors. Experiments showed that all these sensors surpass the ISO 26142 standard; for the response times t90 values of 2 s to 16 s were estimated. Results can be fitted with an exponential or sigmoidal function. It can be demonstrated that the results on transient behaviour depend on both the operating parameters of sensors and Investigation methods, as well as on the experimental conditions: gas change rate and concentration jump. T2 - 7th International Conference on Hydrogen Safety (ICHS 2017) CY - Hamburg, Germany DA - 11.09.2017 KW - Response time KW - Hydrogen sensor KW - Test facility KW - t90 value PY - 2017 SN - 978-88-902391 SP - 1251 EP - 1261 AN - OPUS4-47592 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Tiebe, Carlo T1 - Inline detection of microbial infections on the basis of airborne metabolites using ion mobility spectrometry T2 - Postharvest Unlimited 2008 CY - Berlin, Germany DA - 2008-11-04 PY - 2008 AN - OPUS4-18153 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Tiebe, Carlo T1 - HUMItrace-Sensorsystem mit neuartigen planaren Spurenfeuchtsensoren T2 - TEMPERATUR 2013 CY - Berlin, Germany DA - 2013-06-05 PY - 2013 AN - OPUS4-28811 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Bayat, Mehmet Emin A1 - Kipphardt, Heinrich A1 - Tiebe, Carlo A1 - Tuma, Dirk A1 - Engelhard, Carsten T1 - Trace-Level Ammonia–Water Interactions in Hydrogen: Challenges in Gas Purity Analysis Using Optical-Feedback Cavity-Enhanced Absorption Spectroscopy (OF-CEAS) N2 - Ammonia is a critical impurity in hydrogen fuel due to its irreversible poisoning effect on proton exchange membrane fuel cells. Therefore, international standards (e.g., ISO 14687) set a stringent threshold of 100 nmol/mol. Furthermore, with the growing potential use of ammonia as a hydrogen carrier, its accurate quantification is becoming increasingly important. However, the presence of trace humidity poses analytical challenges, as ammonia may interact with water or interfaces, thereby affecting its detectability. Therefore, the goal of this work is to enable accurate trace ammonia quantification for hydrogen purity measurements through fundamental studies of the methodological challenges. Here, low-pressure sampling (ultra)long-path Optical-Feedback Cavity-Enhanced Absorption Spectroscopy (OF-CEAS) was applied with an effective optical path length of approximately 6.17 km. We studied three average amounts of ammonia: (38.2 ± 0.8) nmol/mol, (74.8 ± 0.7) nmol/mol, and (112.1 ± 1.2) nmol/mol. Furthermore, these amounts were investigated at trace-humidity levels ranging from 0.8 to 8.5 ppmV. We observed a systematic, nonlinear, and humidity-dependent positive measurement bias of up to + (1.0 ± 0.2) nmol/mol at the maximum investigated trace-humidity volume fraction of 8.5 ppmV. This bias was not caused by spectral interference but rather by water-induced accumulation of ammonia within the optical cavity. Moreover, time-resolved measurements in the presence of trace ammonia showed that water desorption follows first-order kinetics, whereas water adsorption followed mixed-order kinetics with an apparent reaction order of 1.57 ± 0.03. Distinct hydration states of surface-bound ammonia were identified, whereas under dry conditions and with increasing amounts of ammonia, enhanced surface adhesion through intermolecular clustering was observed. In addition, the presence of ammonium species within the sorption layer was indirectly confirmed by our experiments. In conclusion, we provide a deeper insight into trace-level ammonia–water interactions and establish a framework for optimizing methodologies, particularly for (ultra)long-path optical gas measurement systems. KW - Ammonia KW - Hydrogen KW - OF-CEAS KW - Humidity KW - Surface Interactions KW - Adsorption PY - 2025 UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-643627 DO - https://doi.org/10.1021/acsmeasuresciau.5c00105 SN - 2694-250X SP - 1 EP - 15 PB - American Chemical Society (ACS) AN - OPUS4-64362 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Pogány, A. A1 - Balslev-Harder, D. A1 - Braban, Ch. F. A1 - Cassidy, N. A1 - Ebert, V. A1 - Ferracci, V. A1 - Hieta, T. A1 - Leuenberger, D. A1 - Martin, N. A. A1 - Pascale, C. A1 - Peltola, J. A1 - Persijn, S. A1 - Tiebe, Carlo A1 - Twigg, M. M. A1 - Vaittinen, Olavi A1 - van Wijk, J. A1 - Wirtz, K. A1 - Niederhauser, B. T1 - A metrological approach to improve accuracy and reliability of ammonia measurements in ambient air N2 - The environmental impacts of ammonia (NH3) in ambient air have become more evident in the recent decades, leading to intensifying research in this field. A number of novel analytical techniques and monitoring instruments have been developed, and the quality and availability of reference gas mixtures used for the calibration of measuring instruments has also increased significantly. However, recent inter-comparison measurements show significant discrepancies, indicating that the majority of the newly developed devices and reference materials require further thorough validation. There is a clear need for more intensive metrological research focusing on quality assurance, intercomparability and validations. MetNH3 (Metrology for ammonia in ambient air) is a three-year project within the framework of the European Metrology Research Programme (EMRP), which aims to bring metrological traceability to ambient ammonia measurements in the 0.5–500 nmol mol−1 amount fraction range. This is addressed by working in three areas: (1) improving accuracy and stability of static and dynamic reference gas mixtures, (2) developing an optical transfer standard and (3) establishing the link between high-accuracy metrological standards and field measurements. In this article we describe the concept, aims and first results of the project. KW - Ammonia in ambient air KW - Traceability KW - Reference gas standards KW - Optical transfer standard KW - Validation and testing infrastructure PY - 2016 DO - https://doi.org/10.1088/0957-0233/27/11/115012 SN - 0957-0233 VL - 27 IS - 11 SP - 115012 EP - 115026 PB - IOP Publishing Ltd. AN - OPUS4-39130 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Moufid, M. A1 - Hofmann, Michael A1 - El Bari, N. A1 - Tiebe, Carlo A1 - Bartholmai, Matthias A1 - Bouchikhi, B. T1 - Wastewater monitoring by means of e-nose, VE-tongue, TD-GC-MS, and SPME-GC-MS N2 - The presence of wastewater and air pollution has become an important risk factor for citizens, not only in terms of problems related to health risks, but also because of its negative impact on the country's image. For this reason, malodorous emission monitoring and control techniques are in high demand in urban areas and industries. The aim of this work is first to build an electronic nose (e-nose) and a Voltammetric Electronic tongue (VE-tongue) in order to study their ability to discriminate between polluted and clean environmental samples. Secondly, Thermal Desorption-Gas Chromatography-Mass Spectrometry (TD-GC-MS), and Solid Phase Micro Extraction-Gas Chromatography–Mass Spectrometry (SPME-GC-MS) are utilized to explain this discrimination by identifying specific compounds from these samples. Indeed, the e-nose, consisted of metal oxide semiconductor gas sensors, is used for the assessment of the studied odorous air and headspace samples from water and wastewater sites. Moreover, the VE-tongue, based on metal electrodes, is utilized to determine the patterns of the sensor array responses, which serve as fingerprints profiles of the analyzed liquid samples. Chemometric tools, such as Principal Component Analysis (PCA), Hierarchical Cluster Analysis (HCA), and Support Vector Machines (SVMs) are operated for the processing of data from the e-nose and the VE-tongue. By using the both systems, the analyses of headspace and liquid samples from the seven sites allow better discrimination. To explain the cause of the obtained discrimination, TD-GC-MS and SPME-GC-MS analyses are well performed to identify compounds related sites. According to these outcomes, the proposed e-nose and VE-tongue are proved to be rapid and valuable tools for analysis of environmental polluted matrices. KW - Wastewater KW - Electronic nose KW - Voltammetric electronic tongue KW - Thermal desorption-gas chromatography-mass spectrometry KW - Solid phase micro extraction-gas chromatography–mass spectrometry PY - 2021 DO - https://doi.org/10.1016/j.talanta.2020.121450 VL - 221 SP - 121450 PB - Elsevier B.V. AN - OPUS4-51099 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Tiebe, Carlo A1 - Melzer, Michael T1 - Seminar about the expression of uncertainty in measurement N2 - The evaluation of measurement uncertainty is essential for testing and calibration laboratories. This paper provides a general process description for the determination of the measurement uncertainty of quantitative data and its application to the conformity assessment with examples, and how to deal with the uncertainty of qualitative (Boolean) results, e. g. when "Alarm" or "No alarm" occours in an instrument display. T2 - GW4SHM - 1st Training Event CY - Online meeting DA - 23.11.2020 KW - Uncertainty KW - Conformity assessment KW - Boolean results PY - 2020 AN - OPUS4-52040 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Tiebe, Carlo A1 - Neumann, Patrick P. A1 - Bartholmai, Matthias T1 - Development of a gas standard generator N2 - Pollution through emission of toxic gases is an increasing problem for the environment. It affects similarly agricultural, industrial and urban areas. In future, environmental emissions in ambient air must be monitored at even lower concentrations as nowadays. One environmental relevant compound is ammonia and its conversion product ammonium that have strong negative impact on human health and ecosystems. Most ammonia measurements in ambient air are performed in the range below 1000 nmol·mol 1 and thus there is a need for reliable traceable ammonia gas standards and in addition in situ analytical procedures for monitoring (in ambient air to avoid that thresholds are exceeded). Therefore, the use of reference materials is necessary for development accompanying test or for calibration, e. g. of structure-integrated sensors and mobile multi-gas sensors. The developed gas standard generator produces gas mixtures that comply with the metrological traceability for ammonia gas standards in the desired environmentally relevant measurement range. The method is based on the permeation of ammonia through a membrane at constant temperature and pressure. The resulting ammonia penetrant gas flow is then mixed with a carrier gas flow to generate a gas standard flow of known concentration. The dynamic rage is enlarged by using a two dilution steps. Depending on the permeation rate, generable molar fractions are possible in the range nmol·mol-1 to a few µmol·mol-1. We present the design of an ammonia gas standard generator and first results of the characterisation of its individual components supporting the uncertainty assessment according to GUM for stable gas concentrations in this range. The relative uncertainty of the generated ammonia gas standard is smaller than 4 % (k = 2). T2 - Networked Environmental Monitoring – from sensor principles to novel services CY - BAM, Berlin, Germany DA - 06.02.2018 KW - Permeation KW - Gas standard generator PY - 2018 AN - OPUS4-44089 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Nattuveettil, Keerthana A1 - Brunner, Nanine A1 - Tiebe, Carlo A1 - Thomas, Marcus A1 - Melzer, Michael A1 - Bartholmai, Matthias A1 - Johann, Sergej A1 - Neumann, Patrick P. T1 - Digital approach of certification in Quality Infrastructure N2 - QI-Digital is a joined project aiming at digitalising Quality Infrastructure (QI) processes involving standardization, conformity assessment, accreditation, metrology, and market surveillance [1]. Federal institute of material research and testing (BAM) is working on the creation of a digital calibration certifi-cate (DCC) to achieve digital metrological traceability and conformity assessment. The utilisation of machine readable and executable DCCs in the XML format is demonstrated on an example of a tem-perature measurement at a hydrogen refueling station. The certificates will be retrieved and analysed automatically at a Process Control System or at a Digital Twin. T2 - SMSI 2023 Conference CY - Nürnberg, Germany DA - 08.05.2023 KW - Quality Infrastructure KW - Digital Certificates KW - Temperature calibration KW - Digitalisation KW - Hydrogen technology PY - 2023 DO - https://doi.org/10.5162/SMSI2023/A3.4 SP - 51 EP - 52 PB - AMA Service GmbH CY - Wunstorf AN - OPUS4-57964 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Melzer, Michael A1 - Thomas, Marcus A1 - Tiebe, Carlo T1 - Digitaler Kalibrierschein 8.1I1451B mit digitaler Signatur und digitalem Akkreditierungssymbol (eAttestation) N2 - Es handelt sich hierbei um die erste Veröffentlichung einer verifizierbaren eAttestation (DCC mit DAkkS-Siegel). Sie wurde vom akkreditierten Kalibrierlabor D-K-11075-08, im Rahmen des QI-Digital Vorhabens, für den Fachbereich 8.1 erstellt und dient im Zusammenhang mit dem Vortrag "Digitale Kalibrierzertifikate – die Umsetzung in akkreditierten Laboratorien" auf dem 324. PTB-Seminar "Berechnung der Messunsicherheit – Empfehlungen für die Praxis" als Anschauungsmaterial für die Digitalisierung in der Metrologie. T2 - 324. PTB-Seminar: Berechnung der Messunsicherheit – Empfehlungen für die Praxis CY - Berlin, Germany DA - 22.05.2023 KW - Akkreditierung KW - DCC KW - Digitalisierung KW - QI-Digital KW - eAttestation PY - 2023 UR - https://www.ptb.de/cms/fileadmin/internet/fachabteilungen/abteilung_8/8.4_mathematische_modellierung/324_PTB_Seminar/Vortraege/8.1I1451B_DAkkS_TEMP_Fluke2638A_SignDFN_eAttest.pdf SP - 1 EP - 3 CY - Berlin, Deutschland AN - OPUS4-58010 LA - mul AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Gawlitza, Kornelia A1 - Johann, Sergej A1 - Mansurova, Maria A1 - Kohlhoff, Harald A1 - Tiebe, Carlo A1 - Bell, Jérémy A1 - Bartholmai, Matthias A1 - Rurack, Knut T1 - Semi-automatic Measurement Device for Long-Term Monitoring of Ammonia in Gas Phase N2 - In the present paper the development of a semi-automated device for long-term monitoring of gaseous ammonia is described. A sensor material was produced that changes its optical properties in the pres-ence of low concentrations of ammonia in air. The implementation into an electronic device enables precise, simple, economic and fast monitoring of low concentrations of harmful gases, like ammonia, and hence can help to improve the climate monitoring in livestock housing, barns or stables. T2 - SMSI 2021 CY - Online meeting DA - 03.05.2021 KW - Spectroscopy KW - Embedded sensor KW - Environment KW - Air quality PY - 2021 SP - 133 EP - 134 AN - OPUS4-52576 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Gawlitza, Kornelia A1 - Johann, Sergej A1 - Mansurova, M. A1 - Kohlhoff, Harald A1 - Tiebe, Carlo A1 - Bell, Jérémy A1 - Bartholmai, Matthias A1 - Rurack, Knut T1 - Semi-automatic Measurement Device for Long-Term Monitoring of Ammonia in Gas Phase N2 - The present paper describes the development of a sensor material that changes its fluorescence in the presence of gaseous ammonia in a relevant concentration range. The implementation into a semi-automatic gas measurement device enables low-cost, precise, simple and fast monitoring of low con-centrations of harmful gases, like ammonia, and hence can help to improve the climate monitoring in livestock housing, barns or stables. T2 - SMSI 2020 CY - Meeting was canceled KW - Spectroscopy KW - Emmbedded sensor KW - Environment KW - Air quality PY - 2020 DO - https://doi.org/10.5162/SMSI2020/B5.4 SP - 133 EP - 134 AN - OPUS4-50867 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bartholmai, Matthias A1 - Neumann, Patrick P. A1 - Tiebe, Carlo T1 - KonSens - Kommunizierende Sensorsysteme für die Bauteil- und Umweltüberwachung N2 - Im Projekt KonSens werden für die Anwendungsbei- spiele bauteilintegrierte Sensorik für Betonkomponen- ten und mobile Multigassensorik Sensorsysteme in Form von Funktionsmustern entwickelt, validiert und angewendet. Schwerpunkte liegen einerseits in der Detektion und Bewertung von Korrosionsprozessen in Beton und andererseits in der Detektion und Quantifi- zierung sehr geringer Konzentrationen toxischer Gase in der Luft. Dabei ist die Adaption der sensorischen Methoden aus dem Labor in reale Messumgebungen inklusive geeigneter Kommunikationstechnik ein wichtiger Aspekt. T2 - Networked Environmental Monitoring – from sensor principles to novel services CY - BAM, Berlin, Germany DA - 06.02.2018 KW - Umweltmonitoring KW - Bauwerksüberwachung PY - 2018 AN - OPUS4-44074 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Tiebe, Carlo A1 - Zunkel, Astrid A1 - Klein, Ulrich A1 - Schlischka, Jörg A1 - Klinger, Christian T1 - Materialuntersuchungen zur Schadensanalyse an einem explodierten Umlaufkühler N2 - Ein Durchlaufkühler ist im Betrieb explodiert. Die zerborstenen Gehäuseteile aus Kunststoff führten zu einem Austreten der Kühlflüssigkeit am Betriebsort sowie zu einem Personenschaden mit Knalltrauma. Bei Funktionsprüfungen am beschädigten Gerät traten unerwartet, aber reproduzierbar Knalleffekte auf der Kupfer-Kühlschlange auf. Ein möglicher Mechanismus konnte im Labor durch Synthese von Kupferazid auf Kupferproben und Auslösung vergleichbarer Knalleffekte nachgestellt werden. Damit ist die Plausibilität des beschriebenen Schadensereignisses mit diesem oder einem ähnlich reagierenden Stoff belegt. Ein eindeutiger Nachweis darüber, dass beim aufgetretenen Schadensfall dieselbe chemische Reaktion stattgefunden hat ist nicht möglich, da die Belag-Überreste aus dem explodierten Kühlgerät für eine Analyse nicht mehr in ausreichender Menge verfügbar waren. T2 - Erfahrungsaustausch für Sachverständige in der Anlagenüberwachung der Industrie (ESA 2021) CY - Online meeting DA - 20.04.2021 KW - Umlaufkühler KW - Schadensanalyse KW - Materialuntersuchungen KW - Gutachten KW - Kupferazid PY - 2021 AN - OPUS4-52484 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Tiebe, Carlo T1 - Materialuntersuchungen zur Schadensanalyse an einem explodierten Umlaufkühler N2 - Ein Umlaufkühler ist im Betrieb explodiert. Splitter des zerborstenen Gehäuses aus Kunststoff wurden mit dem Kühlwasser in die Umgebung geschleudert, am Betriebsort entstand Personenschaden. Bei Funktionsprüfungen am beschädigten Gerät traten unerwartet - aber reproduzierbar - Knalleffekte bei Berührung der Außenoberfläche der Kupfer-Kühlschlange auf. Ein möglicher Mechanismus konnte im Labor durch Synthese von Kupferazid auf Kupferproben und Auslösung vergleichbarer Knalleffekte nachgestellt werden. Damit ist die Plausibilität des beschriebenen Schadensereignisses mit diesem oder einem ähnlich reagierenden Stoff belegt. Ein eindeutiger Nachweis darüber, dass bei dem aufgetretenen Schadensfall dieselbe chemische Reaktion stattgefunden hat, war nicht möglich, da die Belag-Überreste aus dem explodierten Kühlgerät für eine Analyse nicht mehr in ausreichender Menge verfügbar gewesen sind. T2 - BG RCI Präventionstagung, Teil 11 - Inkompatible Systeme – Wenn Chemikalien und Werkstoffe heftig reagieren CY - Online meeting DA - 19.01.2022 KW - Explosion KW - Gutachten KW - Kupferazid KW - Materialuntersuchung KW - Schadensanalyse KW - Umlaufkühler PY - 2022 AN - OPUS4-56686 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Tiebe, Carlo A1 - Zunkel, Astrid A1 - Klein, Ulrich A1 - Schlischka, Jörg A1 - Klinger, Christian T1 - Materialuntersuchungen an einem explodierten Umlaufkühler N2 - Ein Umlaufkühler ist im Betrieb explodiert. Splitter des zerborstenen Gehäuses aus Kunststoff wurden mit dem Kühlwasser in die Umgebung geschleudert, am Betriebsort entstand Personenschaden. Bei Funktionsprüfungen am beschädigten Gerät traten unerwartet - aber reproduzierbar - Knalleffekte bei Berührung der Außenoberfläche der Kupfer-Kühlschlange auf. Ein möglicher Mechanismus konnte im Labor durch Synthese von Kupferazid auf Kupferproben und Auslösung vergleichbarer Knalleffekte nachgestellt werden. Damit ist die Plausibilität des beschriebenen Schadensereignisses mit diesem oder einem ähnlich reagierenden Stoff belegt. Ein eindeutiger Nachweis darüber, dass bei dem aufgetretenen Schadensfall dieselbe chemische Reaktion stattgefunden hat, war nicht möglich, da die Belag-Überreste aus dem explodierten Kühlgerät für eine Analyse nicht mehr in ausreichender Menge verfügbar gewesen sind. KW - Kupferazid KW - Umlaufkühler KW - Explosion KW - Gutachten KW - Schadensanalyse KW - Materialuntersuchung PY - 2022 SN - 2191-0073 VL - 12 IS - 7/8 SP - 15 EP - 21 PB - VDI Fachmedien CY - Düsseldorf AN - OPUS4-55570 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Tiebe, Carlo A1 - Bayat, Mehmet E. T1 - Sensorvalidierungen für die Sicherheit und Prozesskontrolle entlang der Wasserstoffwertschöpfungskette N2 - Die Nutzung von Sensortechnologien, insbesondere zur Gasdetektion von Wasserstoff, ist essenziell für die Sicherheit und Prozesskontrolle von Wasserstofftechnologien. Anwendungen umfassen Sicherheitsüberwachung, Leckdetektion und Prozesskontrolle. Ziel ist die frühzeitige Erkennung freigesetzten Wasserstoffs und die Bestimmung des Wasserstoff-Luftverhältnisses. Dies dient der Gefahrenprävention und der Einleitung geeigneter Maßnahmen, z. B. Alarme. Als wichtiger Prozessschritt im Sicherheits- bzw. Qualitätsmanagement zählt auch eine präzise Charakterisierung von Wasserstoffanteilen in Luft bzw. im Prozessstrom. unterstützt die frühzeitige Schadensdetektion und erhöht die Systemsicherheit. KW - Wasserstoff KW - Sensor KW - Validierung KW - Referenzmaterial KW - Referenzverfahren KW - Sensoren KW - Gaschromatographie KW - GC PY - 2025 VL - 166 IS - 9 SP - 58 EP - 63 PB - Vulkan-Verlag GmbH CY - Essen AN - OPUS4-64119 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Johann, Sergej A1 - Tiebe, Carlo A1 - Kohlhoff, Harald A1 - Bartholmai, Matthias T1 - Feasibility Study for Safe Workplaces through automation and digitalization technology with redesigned Smart Sensors and LoRaWAN Monitoring System N2 - This project addresses the application of safe and healthy workplaces in offices, chemical laboratories and other workplaces where indoor air quality plays an important role. The LoRaWAN (Long Range Wide Area Network) is used as a communication interface to make sensor data globally accessible. The objectives of the project are to create a sensor node and an online and offline system that collects the data from the sensor nodes and stores it on a local server, in a cloud, and also locally on the node to prevent communication failures. An important point in this project is the development of the sensor nodes and the placement of these in the premises, thus no development work is involved in Building the infrastructure. T2 - SMSI 2021 CY - Online meeting DA - 03.05.2021 KW - Smart sensors KW - Air quality monitoring KW - LoRaWAN KW - VOC KW - Multisensor system PY - 2021 SP - 230 EP - 231 AN - OPUS4-52649 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Bayat, Mehmet A1 - Kipphardt, Heinrich A1 - Tiebe, Carlo A1 - Engelhard, Carsten T1 - Effect of Trace Humidity on Trace Ammonia Quantification N2 - Hydrogen is receiving growing attention as a promising medium for energy storage and transportation. Proton exchange membrane (PEM) fuel cells are a key technology for energy conversion from hydrogen. However, high purity hydrogen is required for this technology, as described in standards such as ISO 14687:2019. A critical impurity that impairs PEM efficiency is ammonia, for which a limit value of 100 nmol/mol applies. In addition, the maximum amount of humidity is specified with 5 µmol/mol. The presence of humidity in hydrogen at levels up to 50 times higher than ammonia raises the critical question of whether ammonia can still be quantified accurately in the lower nmol/mol range without interference from water. In addition, the general question arises as to whether the critical analyte, ammonia, can still be detected at all, given the expected surface effects at such amounts of trace humidity. In this work, we describe the influence of trace humidity on the surface behavior of adsorbed ammonia on stainless steel. Samples with ammonia at approximately 100 nmol/mol in hydrogen, with trace humidity levels ranging from 3 µmol/mol to 10 µmol/mol, were carefully prepared using dynamic mixing. Humidification was conducted using an advanced saturation method. These samples were investigated under atmospheric conditions using low pressure sampling Optical Feedback Cavity Enhanced Absorption Spectroscopy (OFCEAS). From the observed time-dependent signals, kinetics were determined and analyzed, yielding insights on the strength of the adsorption behavior of the analytes. T2 - ANAKON 2025 CY - Leipzig, Germany DA - 10.03.2025 KW - OF-CEAS KW - Hydrogen KW - Ammonia KW - Water KW - Humidity KW - Kinetics KW - Adsorption PY - 2025 UR - https://veranstaltungen.gdch.de/microsite/index.cfm?l=11713&sp_id=2&selSiteID=vplanner AN - OPUS4-64046 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Tiebe, Carlo T1 - Sensoren und Analytik für Sicherheit und Prozesskontrolle in Wasserstofftechnologien N2 - Der Beitrag beinhaltet Themen vom H2Safety@BAM-Kompetenzfeld Sensorik, Analytik und zertifizierte Referenzmaterialien (SensRef) mit Fokus auf Mess- und Prüfverfahren mit verschiedenen Sensortechnologien und Ultraschallwellen: Metrologie zur Wasserstoffspeicherung - Euramet-Vorhaben "MefHySto", Erkennung von freigesetztem Wasserstoff sowie die Bestimmung des Wasserstoff-Luftverhälntisses mit Gassensoren, zerstörungsfreie Fehlstellenerkennung mit integriertem Zustandsüberwachungssystem basierend auf geführten Ultraschallwellen zur Lebensdauerüberwachung von Composite-Behältern (Wasserstoffspeicher) sowie faseroptische Sensorik zur Schadenfrüherkennung von Wasserstoffspeichern aufgrund erkennbarer Dehnungsänderungen an Druckbehältern. T2 - DVGW Kongress H2 Sicherheit CY - Online meeting DA - 23.11.2022 KW - H2Safety@BAM KW - SensRef KW - Faseroptische Sensorik KW - Gassensorik KW - Geführte Ultraschallwellen KW - Leckdetektion KW - Metrologie zur Wasserstoffspeicherung KW - Zerstörungsfreie Prüfung KW - Structural Health Monitoring (SHM) PY - 2022 AN - OPUS4-56683 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Tiebe, Carlo T1 - Sensoren und Analytik für Sicherheit und Prozesskontrolle in Wasserstofftechnologien N2 - Der Beitrag behandelt verschiedene Themen aus dem H2Safety@BAM-Kompetenzfeld Sensorik, Analytik und zertifizierte Referenzmaterialien (SensRef) mit Schwerpunkt auf Mess- und Prüfverfahren, die verschiedene Analyseverfahren, Sensortechnologien und Ultraschallwellen nutzen. Ein Teil davon ist das Euramet-Vorhaben "MefHySto" zur Metrologie der Wasserstoffspeicherung. Des Weiteren werden Verfahren zur Erkennung von freigesetztem Wasserstoff und zur Bestimmung des Wasserstoff-Luftverhältnisses mithilfe von Gassensoren behandelt. Ein weiterer Aspekt ist die zerstörungsfreie Fehlstellenerkennung mit einem integrierten Zustandsüberwachungssystem, das auf geführten Ultraschallwellen basiert und zur Überwachung der Lebensdauer von Composite-Behältern (Wasserstoffspeicher) dient. Zudem wird die Anwendung faseroptischer Sensorik zur Schadenfrüherkennung an Wasserstoffspeichern diskutiert. Dabei werden erkennbare Dehnungsänderungen an Druckbehältern als Indikatoren genutzt. T2 - DVGW-Kongress "H2 Sicherheit" CY - Online meeting DA - 15.03.2023 KW - Faseroptische Sensorik KW - Gassensorik KW - Geführte Ultraschallwellen KW - Leckdetektion KW - Metrologie zur Wasserstoffspeicherung KW - Structural Health Monitoring (SHM) KW - Zerstörungsfreie Prüfung KW - SensRef KW - H2Safety@BAM PY - 2023 AN - OPUS4-57529 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Moufid, M. A1 - Tiebe, Carlo A1 - El Bari, N. A1 - Bartholmai, Matthias A1 - Bouchikhi, B. T1 - Characterization of Unpleasant Odors in Poultry Houses Using Metal Oxide Semiconductor-Based Gas Sensor Arrays and Pattern Recognition Methods N2 - In this study, the ability of an electronic nose developed to analyze and monitor odor emissions from three poultry farms located in Meknes (Morocco) and Berlin (Germany) was evaluated. Indeed, the potentiality of the electronic nose (e-nose) to differentiate the concentration fractions of hydrogen sulfide, ammonia, and ethanol was investigated. Furthermore, the impact change of relative humidity values (from 15% to 67%) on the responses of the gas sensors was reported and revealed that the effect remained less than 0.6%. Furthermore, the relevant results confirmed that the developed e-nose system was able to perfectly classify and monitor the odorous air of poultry farms. T2 - 1st International Electronic Conference on Chemical Sensors and Analytical Chemistry CY - Online meeting DA - 01.07.2021 KW - Pattern recognition methods KW - Gas sensors KW - Electronic nose KW - poultry odorous air monitoring PY - 2021 UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-544005 UR - https://csac2021.sciforum.net/ DO - https://doi.org/10.3390/CSAC2021-10481 VL - 5 IS - 52 SP - 1 EP - 7 PB - MDPI AN - OPUS4-54400 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Tiebe, Carlo T1 - Prüf- und Messverfahren mit verschiedenen Sensortechnologien und Ultraschallwellen N2 - Der Vortrag zum Mess- und Prüfverfahren mit verschiedenen Sensortechnologien und Ultraschallwellen beinhaltet die Themen: Metrologie zur Wasserstoffspeicherung - Euramet-Vorhaben "MefHySto", Erkennung von freigesetztem Wasserstoff sowie die Bestimmung des Wasserstoff-Luftverhälntisses mit Gassensoren, zerstörungsfreie Fehlstellenerkennung mit integriertem Zustandsüberwachungssystem basierend auf geführten Ultraschallwellen zur Lebensdauerüberwachung von Composite-Behältern (Wasserstoffspeicher) sowie faseroptische Sensorik zur Schadenfrüherkennung von Wasserstoffspeichern aufgrund erkennbarer Dehnungsänderungen an Druckbehältern. T2 - DVGW Kongress H2 Sicherheit CY - Online meeting DA - 28.09.2021 KW - Leckdetektion KW - Metrologie zur Wasserstoffspeicherung KW - Gassensorik KW - Structural Health Monitoring (SHM) KW - Geführte Ultraschallwellen KW - Faseroptische Sensorik KW - Zerstörungsfreie Prüfung PY - 2021 AN - OPUS4-54136 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Tiebe, Carlo T1 - Mess- und Prüfverfahren mit Sensorik N2 - Mess- und prüftechnische Verfahren sind zur Prozesskontrolle und Sicherheitsüberwachung in Wasserstofftechnologien von hoher Bedeutung. Typische Anwendungsgebiete von Sensoren sind Sicherheitsüberwachung, Leckdetektion und Prozesskontrolle. In diesem Beitrag werden Themen zur Erkennung von freigesetztem Wasserstoff sowie die Bestimmung des Wasserstoff-Luftverhältnisses mit Gassensoren, Fehlstellenerkennung mit geführten Ultraschallwellen zur Lebensdauerüberwachung (Structural Health Monitoring) von Wasserstoffspeichern sowie der Einsatz faseroptischer Sensoren zur Überwachung des Dehnungs- und Alterungsverhaltens sowie zur Schadensfrüherkennung von Wasserstoffspeichern vorgestellt. T2 - DVGW Kongress H2 Sicherheit CY - Online meeting DA - 27.01.2021 KW - Metrologie KW - Gassensoren KW - Structural Health Monitoring KW - Faseroptische Sensoren KW - Wasserstoff PY - 2021 AN - OPUS4-52141 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Tiebe, Carlo T1 - Ammoniakbestimmung mit einem portablen Fluoreszenzsensor N2 - Ammoniakemissionen in die Umwelt erfolgen insbesondere durch die Landwirtschaft (93,6 %), aber auch durch Verbrennungsprozesse in der die Abfallwirtschaft (2,3 %) und den Straßenverkehr (1,8 %). Dieser Stoff ist selbst in geringen Konzentrationen nicht nur eine Geruchsbelästigung, sondern auch eine Substanz mit ökologischer und klimatischer Relevanz. Die Bestimmung von Ammoniak in relevanten Konzentrationen von kleiner 25 μg m-3 erfolgt im Allgemeinen über NH4+ als Analyten, spektralfotometrisch oder mit der Ionenchromatographie nach Überführung in die flüssige Phase. Wegen der niedrigen Konzentrationen an Ammoniak in der Außenluft wird meist eine gesammelte Probe verwendet oder die Bestimmung erfolgt nach einer aktiven, anreichernden Probenahme. Die eigenen Arbeiten sollen dazu beitragen, die Ammoniak-Bestimmung in der Außenluft präziser, sowie schneller und kostengünstiger zu machen. Die BAM prüfte daher kommerzielle elektrochemische und Metalloxid-basierte Sensoren, die für diesen Konzentrationsbereich aber nur bedingt geeignet sind. Deshalb wurden alternativ eigene Entwicklungen zum Nachweis von Ammoniak im Spurenbereich aufgenommen, wobei der Analyt über die Änderung der Fluoreszenz eines BODIPY-Farbstoffs bei 550 nm mittels eines portablen Fluoreszenz-Sensors direkt aus der Gasphase gemessen wird. Zur Kalibrierung von Ammoniak-Sensoren und -Messgeräten steht ein stationäres System basierend auf der Mischung von zertifizierten Prüfgasen aus Druckflaschen mit kalibrierten Massendurchfluss-regler (MFC) zur Verfügung. Darüber hinaus erfolgt eine chemische Analyse der verwendeten Gasgemische mittels eines Massenspektrometers. Für die Kalibrierung und Prüfung von Sensoren und Messgeräten vor Ort wurde ein mobiles Prüfsystem entwickelt. Die Generierung von Ammoniak-haltigen Gasen im Spurenbereich von 0,5 nmol/mol bis 500 nmol/mol erfolgt durch das Permeationsverfahren nach ISO 6145-10. Für die Realisierung der Rückführbarkeit der Ammoniakbestimmung werden von den Nationalen Metrologischen Instituten sowie designierten Instituten Standards bereitgestellt und auch weiterentwickelt. Die primären metrologischen Standards beruhen auf SI-Einheiten und sind die Basis für eine Rückführbarkeit der Sensoren bzw. Analysengeräte. T2 - 5. Fachsymposium „Intelligente Sensorik/Analytik und sichere Sensornetze: Innovative Technologien und neue Anwendungsfelder“ CY - Karlsruhe, Germany DA - 14.11.2018 KW - Ammoniak KW - Sensor KW - Multigassensorik PY - 2018 AN - OPUS4-46926 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Tiebe, Carlo T1 - Detektion von leicht flüchtigen Schimmelpilzmetaboliten mittels Ionen-Mobilitäts-Spektrometrie (IMS) T2 - ANAKON 2009 CY - Berlin, Germany DA - 2009-03-17 PY - 2009 AN - OPUS4-19101 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Tiebe, Carlo T1 - New planar trace humidity sensor T2 - IMCS 2012 - The 14th International Meeting on Chemical Sensors CY - Nuremberg, Germany DA - 2012-05-20 PY - 2012 AN - OPUS4-25680 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Tiebe, Carlo T1 - Development of a mobile ammonia gas standard generator for environmental measurements T2 - GAS2015 CY - Rotterdam, Netherland DA - 2015-06-10 PY - 2015 AN - OPUS4-33889 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Hofmann, Michael A1 - Tiebe, Carlo T1 - VDI/VDE 3518 - Technische Richtlinie für Multigassensoren N2 - Der Beitrag präsentiert die erarbeiteten technischen Richtlinien zur Anwendung und Prüfung von Multigassensoren innerhalb der Richtlinienreihe VDI/VDE 3518 sowie in diesem Zusammenhang die Möglichkeiten der Sensorprüfung im akkreditierten Prüflabor des Fachbereichs 8.1 der BAM. Im Speziellen wird das in Kürze veröffentlichte Blatt 3 der Richtlinienreihe vorgestellt, das Bezug auf Multigassensoren für geruchsbezogene Messungen mit elektronischen Nasen nimmt. T2 - 5. Fachsymposium "Intelligente Sensorik/Analytik und sichere Sensornetze: Innovative Technologien und neue Anwendungsfelder" CY - Eggenstein -Leopoldshafen, Germany DA - 14.11.2018 KW - Multigassensoren KW - Richtlinie KW - Prüfung KW - Elektronische Nase PY - 2018 UR - http://hybridsensornet.org/symposien.html SP - 61 EP - 62 AN - OPUS4-46839 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -