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1000
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Abstract/Summary
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The analytical method is a validated measurement procedure for the determination of many solvents in solvent mixtures for monitoring their Occupational Exposure Limits (OELs) or MAK values at workplaces. Sampling is performed by drawing air through a tube filled with Chromosorb106 using a suitable flow‐regulated pump. After thermal desorption of the Chromosorb 106 the sample is analysed by means of gas chromatography fitted with two detectors a flame ionisation detectors (FID) for quantification and a mass selective detector (MSD) for qualitative evaluation. The quantitative determination is based on calibration functions obtained by means of multiple‐point calibrations using the external standard method with comparative standards. The limits of quantification (LOQs) are determined on the basis of aliquots from 1 to 10 mL of the calibration gas in the lower concentration range. The expanded uncertainties for these parameters are between 13 and 22% for the individual solvent component.
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