Determination of maleic anhydride in occupational atmospheres

Maleic anhydride has many uses in industry, but workers’ exposure to it is poorly known. Our new method allows airborne maleic anhydride to be determined with a limit of quantification of 1 μg/m 3 per 12 l of air, i.e., the concentration of about 0.01 times the occupational exposure standard (0.4 mg...

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Bibliographic Details
Published in:Journal of Chromatography A 2002-12, Vol.982 (2), p.261-266
Main Authors: Pfäffli, Pirkko, Hämeilä, Mervi, Kuusimäki, Leea, Wirmoila, Ritva
Format: Article
Language:English
Subjects:
Air Pollutants, Occupational - analysis
Analysis methods
Applied sciences
Atmospheric pollution
Exact sciences and technology
Gas Chromatography-Mass Spectrometry
Maleic anhydride
Maleic Anhydrides - analysis
Occupational Exposure
Organic acids
Pollution
Sensitivity and Specificity
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Summary:Maleic anhydride has many uses in industry, but workers’ exposure to it is poorly known. Our new method allows airborne maleic anhydride to be determined with a limit of quantification of 1 μg/m 3 per 12 l of air, i.e., the concentration of about 0.01 times the occupational exposure standard (0.4 mg/m 3). Air samples are collected in Tenax tubes containing sodium sulfate as a drying agent. Maleic anhydride is eluted with methyl tert.-butyl ether containing 5% acetonitrile and 0.1% acetic anhydride, and determined by capillary gas chromatography with electron-capture detection without interference from generic anhydrides. The tested method suits both long-term and short-term measurements.
ISSN:0021-9673
DOI:10.1016/S0021-9673(02)01590-X