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Autor

  • Neumann, Patrick P. (10)
  • Bartholmai, Matthias (6)
  • Bandow, Nicole (4)
  • He, Shulin (3)
  • Isleyen, A. (3)
  • Johann, Sergej (3)
  • Makowski, Maike (3)
  • Tiebe, Carlo (3)
  • Torge, Manfred (3)
  • Lehnik-Habrink, Petra (2)
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Erscheinungsjahr

  • 2018 (26)
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  • Posterpräsentation (57) (entfernen)

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  • Englisch (46)
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  • Mobile Robot Olfaction (6)
  • Immunoassay (4)
  • PFOA (4)
  • PFOS (4)
  • CRM (3)
  • Immunity (3)
  • Leaching (3)
  • Localization of gas sources (3)
  • Soil (3)
  • Termite (3)
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Organisationseinheit der BAM

  • 1 Analytische Chemie; Referenzmaterialien (29)
  • 4 Material und Umwelt (17)
  • 1.8 Umweltanalytik (13)
  • 8 Zerstörungsfreie Prüfung (12)
  • 8.1 Sensorik, mess- und prüftechnische Verfahren (12)
  • 1.7 Organische Spuren- und Lebensmittelanalytik (9)
  • 4.2 Materialien und Luftschadstoffe (7)
  • 4.3 Schadstofftransfer und Umwelttechnologien (6)
  • 1.1 Anorganische Spurenanalytik (5)
  • 5 Werkstofftechnik (5)
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Transformation of the antidiabetic drug metformin (2018)
Piechotta, Christian
For years there have been more and more reports on the presence of drugs in the aquatic environment. Due to the demographic change, the consumption of pharmaceuticals has risen sharply. After taking the drugs, they are partly metabolized in the human body. However, the metabolism is not complete so that both the metabolites and non-metabolized amounts of the parent compounds are excreted. These compounds reach the waste water and afterwards the sewage treatment plants. In sewage treatment plants transformation products can be formed by the oxidative conditions during wastewater treatment processes. The transformation products may have a higher toxicity than the actual environmental pollutants and are often only partly removed during the waste water treatment. Since a lot of these compounds are still unknown, the transformation products are not detected by target analysis used in sewage treatment plants and are often released undetected in the aquatic ecosystems. The released substances may be subject to additional transformation processes in the environment. Pharmaceuticals produced in high amounts can be already detected in the μg/L range in water bodies worldwide. Metformin and its major transformation product guanylurea are one of the main representatives. Metformin is the drug of choice for treating type 2 diabetes. The drug therapy for diabetes mellitus has increased significantly in recent years. In the year 2015 1500 tons of metformin were prescribed in Germany (for statutory insured persons). Metformin is not metabolized in the human body and is excreted unchanged therefore concentrations between 57 μg/L and 129 μg/L are found in German waste water treatment plants influents. In this work the transformation of the antidiabetic drug metformin is investigated. The degradation of metformin is initialize by commercial water treatment techniques like UV-radiation or noncommercial techniques like heterogenous photocatalysis based on titanium dioxide. The degradation of metformin and resulting transformation products are analyzed by LC-MS/MS and LC-HRMS.
Gas Source Localisation from the Next Dimension (2018)
Hüllmann, Dino
Leaking methane (CH4) from infrastructures, like pipelines, industrial complexes and landfills, or accidental hazardous goods transports is critical for the environment, but can also pose a risk to human life. To enable a fast detection and localisation of these kind of leaks, we developed a novel robotic platform for aerial remote gas sensing. The platform combines an unmanned micro aircraft (UAV), a 3-axis aerial stabilisation gimbal and an open-path gas detector based on the tunable diode laser absorption spectroscopy (TDLAS).
An immunochromatographic assay for the determination of bisphenol a releases from plastic materials (2018)
Raysyan, Anna
Background. The worldwide increase in the use of bisphenol A (BPA), a monomer commonly used to manufacture polycarbonate plastic products and the epoxy resins that line metal cans, has resulted in an increased human exposure because both products come in contact with food and beverages. Since BPA is an endocrine disruptor excessive exposure could affect human reproductive function. In response, various countries have adopted a range of measures, from voluntary reductions to outright bans of BPA in some products, mostly in baby bottles and containers for canned foods. Nonetheless, consumers would certainly appreciate a quick test for their own assessment of contaminations by bisphenol A. Methods. An immunochromatographic test strip was developed. This lateral-flow immunoassay (LFIA) is based on anti-BPA antibodies (from mouse) conjugated with gold nanoparticles as the marker, deposited in an elaborate pad. To form control and test zones, anti-mouse antibody and a BPA-BSA conjugate were spotted on the nitrocellulose membrane, respectively. Results. Negative samples are revealed by red lines both in the test and control zones, respectively, whereas positive samples produce a single red line only in the control zone. The limit of detection (LOD) was found to be 0.05 µg/l, visually detected by the naked eye within 5 minutes. In addition, the intensities at the test line can be read by dedicated lateral flow readers (opTrilyzer® and Cube by opTricon, Berlin) for a more precise and documented determination. Conclusion. Pregnancy-test like strips in combination with hand-held readers provide a simple and versatile tool to determine the presence of bisphenol A quantitatively, making it a very attractive analytical approach especially for on-site applications at critical points, such as environmental analysis, consumer protection, and materials testing.
Test guideline on particle size and size distribution of manufactured nanomaterials (2018)
Kuhlbusch, T.
The particle size distribution is considered the most relevant information for nanoscale property identification and material characterization. The current OECD test guideline on particle size and size distribution (TG 110) is not applicable to ‘nano-sized’ objects. In this project we thus develop a new OECD test guideline for the measurement of the size and size distribution of particles and fibers with at least one dimension in the range of 1 - 1000 nm. A fiber is defined as an object having an aspect ratio of length/diameter l/d >3. The width and length of each fiber should be measured concurrently. In order to measure the particle size distributions, many techniques are available. 9 methods for particles and 2 methods for fibres have been tested in a prevalidation study and appropriate methods will be compared in an interlaboratory round robin test starting in February 2019.
Wireless Mobile Sensor Device for in-situ Measurements with Multiple Fluorescent Sensors (2018)
Johann, Sergej
This paper describes a wireless mobile prototype able to perform optical measurements by means of a miniaturized spectrometer for low light analysis, e.g. fluorescent sensors. Evaluations, calculations, calibration management and result display are performed by a computer or a standard tablet. The device was designed primarily to detect traces of oil in drinking or ground water and for the analyses of crude oils. However, it can also address a wide range of fluorescent sensors. The fast and user-friendly inspection of water quality or oil properties, as well as the adaptability and mobility, make the device attractive for a variety of users. Further application areas could be easily implemented by adapting the optics and the software (database, data processing and calibration plots, etc.).
Wasseranalytik oberhalb des Siedepunktes (2018)
Dittmann, Daniel
Das Poster fasst die Möglichkeiten gekoppelter thermischer Analyseverfahren mit Zersetzungsgasanalyse (TGA, TGA-FTIR, TGA-MS, TED-GC-MS) zusammen und stellt ihre Anwendungen für Wasserproben an ausgewählten Beispielen vor.
Gas Tomography Up In The Air! (2018)
Neumann, Patrick P.
In this paper, we present an autonomous aerial robot to reconstruct tomographic 2D slices of gas plumes in outdoor environments. Our platform, the so-called Unmanned Aerial Vehicle for Remote Gas Sensing (UAV-REGAS) combines a lightweight Tunable Diode Laser Absorption Spectroscopy (TDLAS) sensor with a 3-axis aerial stabilization gimbal for aiming on a versatile octocopter. The TDLAS sensor provides integral gas concentration measurements but no information regarding the distance traveled by the laser diode's beam or the distribution of the gas along the optical path. We complemented the set-up with a laser rangefinder and apply principles of Computed Tomography (CT) to create a model of the spatial gas distribution from these integral concentration measurements. To allow for a rudimentary ground truth evaluation of the applied gas tomography algorithm, we set up a unique outdoor test environment based on two 3D ultrasonic anemometers and a distributed array of 10 infrared gas transmitters. We present first results showing the 2D plume reconstruction capabilities of the system under realistic conditions.
AEROMET: Aerosol metrology for atmospheric science and air quality (2017)
Friese, Carmen
Air pollution is the leading cause of environmentally related health effects. This project aims at improving air quality monitoring in Europe.
Reference materials for microplastics in environmental matrices (2018)
Becker, Roland
The pollution of marine, limnic and terrestrial environments with plastic waste and the potential impact especially on biota and humans has received increasing attention in recent years. Special focus is on particles smaller than 5 mm, the so-called microplastics. Consequently, possible regulations of emission and remediation efforts require sound information on the occurrence and fate of microplastics in the respective environmental compartments. Microplastics (MP) differ from classical organic pollutants in biota or the environment in that they do not consist of clearly defined low-molecular weight compounds but of polymer particulates with varying sizes and chemical compositions. This leads to specific challenges regarding the analytical techniques to be employed for their identification and quantification. Microplastics are defined as polymer particle in the size range between 1 µm and 5 mm and cover a wide range of polymers such as polyethylene, polypropylene, polystyrene and polyethylene terephthalate in variable geometric shapes. Properties relevant for environmental microplastics are polymer type, particle form and size distribution, surface morphology (aging status) and total mass fraction contained in a given sample. Polymer identification and particle size estimation using optical methods (IR and Raman spectroscopy) are time consuming and complicated by surface characteristics as a result of weathering, soiling, and microbial colonisation. Total mass fractions of MP in environmental samples can be determined by thermo-analytical methods. There are currently no standardised methods for sampling, sampling preparation, or detection of MP in environmental samples. So far, qualitative and quantitative investigations are done by research institutes and have not reached the routine laboratory community. The near future will see harmonisation efforts of MP mass fraction determination in environmental matrices by thermo-analytical procedures. The immediate need for reference materials during method development and comparison is outlined with regard to relevant matrix/polymer compositions, existing regulations and currently achievable detection limits. Examples for solid environmental matrix reference materials are discussed regarding the challenges encountered with matrices and polymer types as well as homogeneity testing and property value characterisation.
Airborne Remote Gas Sensing and Mapping (2018)
Neumann, Patrick P. ; Bartholmai, Matthias
Leaking methane (CH4) from infrastructures, such as pipelines and landfills, is critical for the environment but can also pose a safety risk. To enable a fast detection and localization of These kind of leaks, we developed a novel robotic platform for aerial remote gas sensing - the so-called Unmanned Aerial Vehicle for Remote Gas Sensing (UAV-REGAS).
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