Filtern
Erscheinungsjahr
Dokumenttyp
- Zeitschriftenartikel (30)
- Vortrag (18)
- Posterpräsentation (9)
- Beitrag zu einem Tagungsband (5)
- Forschungsbericht (2)
- Buchkapitel (1)
Schlagworte
- LIBS (10)
- Soil (7)
- XRF (6)
- RFA (5)
- IDMS (4)
- Prozessanalytik (4)
- TIMS (4)
- Boden (3)
- ICP-MS (3)
- Reference materials (3)
- RoHS (3)
- Certification (2)
- Isotope dilution (2)
- Online-Analytik (2)
- Recycling (2)
- Sulfur (2)
- Uncertainty budget (2)
- X-ray fluorescence (2)
- Acrylamid (1)
- Agricultural (1)
- Agriculture (1)
- Aluminium phosphate (1)
- Animal slurry (1)
- Anwendungen von Ionenstrhalen (1)
- BONARES (1)
- Baustoffe (1)
- Beta-christobalite structure type (1)
- Bewitterung (1)
- Blast-furnace sludge (1)
- Bodenanalytik (1)
- Bodenfruchtbarkeit (1)
- Bor (1)
- CRDS (1)
- CRM (1)
- Calcium carbonate (1)
- Chemometrics (1)
- Chemometrie (1)
- Circular economy (1)
- Classical oven-drying (1)
- Commercial moisture analyzer (1)
- Detection limits (1)
- Düngemittelgewinnung (1)
- ERM (1)
- Electric arc furnace dust (1)
- Elektrolichtbogenofen (1)
- Elemental analysis (1)
- Elemental fingerprints (1)
- Europäische Referenzmaterialien (1)
- Feature selection (1)
- Fertilizer (1)
- Fossil fuel (1)
- Gas oil (1)
- Gas-oil (1)
- Geochemistry (1)
- Hazardous waste (1)
- High-cristobalite form (1)
- ICP-OES (1)
- ID-ICP-MS (1)
- IMEP-9 (1)
- IMS (1)
- Instrumental analysis (1)
- Interlaboratory comparison (1)
- Ionenstrahlanalytik (1)
- Isotope (1)
- Isotope ratio (1)
- Karl Fischer titration (1)
- Kernkraftwerk (1)
- Klärschlammasche (1)
- LA-ICP-MS (1)
- Laser-induced breakdown spectroscopy (LIBS) (1)
- Low sulfur (1)
- Material analysis (1)
- Materialanalyse (1)
- Matrix samples (1)
- Modelling (1)
- Moisture (1)
- Multivariate (1)
- Multivariate data analysis (1)
- Multivariate methods (1)
- NIR (1)
- NMR spectroscopy (1)
- Nanochrystalline AlPO4 (1)
- Oberflächenanalyse (1)
- Online (1)
- Online-RFA (1)
- Open vessel digestion (1)
- PERM (1)
- PTI-MS (1)
- Partial least squares regression (PLSR) (1)
- Perowskit (1)
- Phosphor (1)
- Phosphorus (1)
- Phosphous recovery (1)
- Photometric P determination (1)
- Photon activation (1)
- Plastic (1)
- Polyethylene (1)
- Portland cement (1)
- Potash (1)
- Precision agriculture (1)
- Precision farming (1)
- Principal component analysis (PCA) (1)
- Process analytical technology (1)
- Process analytical technology (PAT) (1)
- Proximal soil sensing (1)
- Raman spectroscopy (1)
- Reduktionsprozess (1)
- Reference Material (1)
- Reference material (1)
- Reference procedure (1)
- Resource Recovery (1)
- Röntgenfluoreszenzanalyse (1)
- Röntgenfluoreszenzspektrometrie (1)
- SEM/EDS (1)
- SERDS (1)
- Schadstoffaustrag (1)
- Schwefel (1)
- Selective Chlorination (1)
- Selective chlorination (1)
- Sensor system (1)
- Sewage sludge (1)
- Sewage sludge ash (1)
- Soil heterogeneity (1)
- Sr and Nd isotope analysis (1)
- Stabilization of high-temperature phase at RT (1)
- Statistical analysis (1)
- Stoffparameter (1)
- Sulfur in oil (1)
- TDLAS (1)
- Tantal (1)
- Terahertz spectroscopy (1)
- Thermogravimetry (1)
- Trace elements (1)
- Umweltsimulation (1)
- Uncertainty (1)
- WEEE (1)
- Wet digestion (1)
- X-Ray fluorescence (1)
- X-ray fluorescence spectrometry (1)
- Zinc (1)
- Zinc chloride (1)
- muXRF (1)
Organisationseinheit der BAM
- 1 Analytische Chemie; Referenzmaterialien (12)
- 1.4 Prozessanalytik (12)
- 4 Material und Umwelt (5)
- 4.4 Thermochemische Reststoffbehandlung und Wertstoffrückgewinnung (4)
- 1.1 Anorganische Spurenanalytik (2)
- 4.2 Material-Mikrobiom Wechselwirkungen (2)
- 1.0 Abteilungsleitung und andere (1)
- 1.7 Organische Spuren- und Lebensmittelanalytik (1)
- 1.8 Umweltanalytik (1)
- 4.0 Abteilungsleitung und andere (1)
Eingeladener Vortrag
- nein (18)
Messunsicherheiten
(2002)
A new method has been developed for the measurement of sulfur in gas oils using a high pressure asher (HPA) for sample digestion. This, combined with a calibrated enriched isotopic reference material, and high precision mass spectrometry, makes it a powerful tool for an accurate and precise determination of the sulfur content in fossil fuels. The method described here was one of the methods used in the certification of the candidate reference materials BCR-104R, BCR-671 and BCR-672. Approximately 0.2 g of the gas oil samples were spiked with the spike isotopic reference material IRMM-646, which is enriched in 34S, and combusted in an HPA using nitric acid. The isotopes of sulfur were measured as arsenic monosulfides (AsS+) using a thermal ionization mass spectrometer equipped with a Faraday detector. The total uncertainty of the sulfur content (k = 2) is about 1%. The certified reference materials NIST SRM-2724b and NIST SRM-1619b and BCR-105 were used as part of the method validation work. The mass content of sulfur in BCR-104R was measured to be 1014 µg g-1, BCR-671 has 450 µg g-1 sulfur and BCR-672 shows a sulfur mass content of 201 µg g-1. The sulfur content of the candidate reference materials is homogeneous for the sample size used.
A comparison of high accuracy methods for the analysis of total sulfur in gas oils by three metrology institutes is described. The work contains a comparison of three different aspects of the analysis: sample digestion, instrumental measurement and isotope dilution strategies.
Thermal ionisation mass spectrometry (TIMS) in combination with high pressure asher (HPA) or Carius tube digestion has traditionally been used for such high accuracy analysis. However, this paper demonstrates that the faster, less laborious technique of ICP-MS in combination with microwave digestion is equally capable. Results from the comparison experiments show excellent agreement for fuel samples containing sulfur concentrations in the range 11200 µg g-1. This excellent agreement across the different sample preparation, measurement and isotope dilution techniques has been exploited in the certification of two new diesel fuel reference materials.
A new setup for fast spatially resolved measurements of elemental trace amounts under total reflection conditions using a new colour X-ray camera is described. Samples prepared on conventional total reflection X-ray fluorescence (TXRF) reflectors were measured at BESSY II synchrotron. A spatial resolution of 50 × 50 µm² was obtained, while the required time for the investigation of a 10 × 10 mm² sample is 30 seconds. The set-up is up to 350 times faster than conventional X-ray fluorescence systems for elemental traces. The major components of the X-ray camera are polycapillary optics and a pn-CCD chip with an active area of 13 × 13 mm². This area is divided into 264 × 264 pixels of 48 × 48 µm². A full X-ray spectrum with a resolution of 152 eV @ 5.9 keV and a chip temperature of 246 K is recorded for each pixel. The chip has a read-out rate of 400 Hz.
Elementanalyse mit Röntgenfluoreszenzspektrometrie direkt am Materialstrom in Produktionsprozessen gewinnt zunehmend an Bedeutung. Die Röntgenfluoreszenzspektrometrie kann aufgrund der technischen Entwicklung mittlerweile ohne aufwändige Probenvorbereitung als aussagekräftige Informationsquelle für Stoffparameter im industriellen Prozess eingesetzt werden. Der Einsatz von online Röntgenfluoreszenzanalyse zahlt sich sowohl finanziell als auch zeitlich schnell aus, da sie sowohl für den ökonomischen Einsatz von Rohmaterialien, als auch z. B. im Materialrecycling zu gebrauchen ist. In diesem Beitrag werden vier unterschiedliche Einsatzmöglichkeiten beschrieben.
Vier neue Referenzmaterialien zum chemischen Nachweis von Acrylamid in Knäckebrot, Schwefel in Benzin, von polyzyklischen aromatischen Kohlenwasserstoffen und von Legierungen in Akkus stellt die BAM vor. Diese Referenzmaterialien sind durch die BAM zertifiziert und durch das Europäische Referenzmaterialien Programm ERM auf den Markt gebracht.