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    9. Selen – Methode zur Bestimmung von Selen und seinen anorganischen Verbindungen in der Luft am Arbeitsplatz mittels Atomabsorptionsspektroskopie (AAS). Luftanalysen-Methode
Cover: The MAK Collection for Occupational Health and Safety

The MAK Collection for Occupational Health and Safety

German Research Foundation – Permanent Senate Commission for the Investigation of Health Hazards of Chemical Compounds in the Work Area
(MAK Commission)

ISSN 2509-2383



Selen – Methode zur Bestimmung von Selen und seinen anorganischen Verbindungen in der Luft am Arbeitsplatz mittels Atomabsorptionsspektroskopie (AAS)

Luftanalysen-Methode

Thomas Göen1
Katrin Pitzke2
  Ralph Hebisch3
  Andrea Hartwig4
  MAK Commission5

1 Friedrich-Alexander-Universität Erlangen-Nürnberg, Institut und Poliklinik für Arbeits-, Sozial- und Umweltmedizin, Henkestraße 9–11, 91054 Erlangen, Deutschland
2 Institut für Arbeitsschutz der Deutschen Gesetzlichen Unfallversicherung (IFA), Alte Heerstraße 111, 53757 Sankt Augustin, Deutschland
3 Bundesanstalt für Arbeitsschutz und Arbeitsmedizin (BAuA), Friedrich-Henkel-Weg 1–25, 44149 Dortmund, Deutschland
4 Institut für Angewandte Biowissenschaften, Abteilung Lebensmittelchemie und Toxikologie, Karlsruher Institut für Technologie (KIT), Adenauerring 20a, Geb. 50.41, 76131 Karlsruhe, Deutschland
5 Ständige Senatskommission zur Prüfung gesundheitsschädlicher Arbeitsstoffe, Deutsche Forschungsgemeinschaft, Kennedyallee 40, 53175 Bonn, Deutschland

Abstract

This analytical method is a validated measurement procedure for the determination of selenium [7782‐49‐2] and its inorganic compounds in workplace air in a concentration range of one tenth up to twice the currently valid OEL of 0.05 mg/m3 E. Sampling is performed by drawing a defined volume of air through a membrane filter using a suitable pump. The flow rate ist set to 1.4 L/min and sampling is performed over 2 h. The dust deposited on the membrane filter is treated with acid and then analysed using atomic absorption spectrometry with the graphite furnace technique (GFAAS). The quantitative determination is based on a calibration function, whereat the selenium concentration of the reference standard is plotted against the peak area calculated with an integration program. The limit of quantification is 0.0004 mg/m3 based on an air sample volume of 168 L. The mean recovery was 113.9% and the expanded uncertainty for a validation range of 0.01 mg/m3 to 1.0 mg/m3 was between 27% and 22%.

Keywords

selenium, air analyses, analytical method, workplace measurement, hazardous substance, graphite furnace atomic absorption spectrometry, GF-AAS, membrane filter, mixed cellulose ester, acid digestion