Workplace air - Determination of particulate arsenic and arsenic compounds and arsenic trioxide vapour - Method by hydride generation and atomic absorption spectrometry

2Scope / Description

This International Standard specifies a method for the determination of the mass concentration of particulate arsenic and arsenic compounds, and arsenic trioxide vapor, in workplace air using continuous flow hydride generation or flow injection analysis by hydride generation and atomic absorption spectrometry. This method is not suitable for the determination of arsenic in the form of metallic arsenides that decompose in water or acid (see 10.1). The method is suitable for the determination of arsenic in the range of approximately 100 ng to 125 pg per sample when test solutions are prepared using aliquots of the sample solution within the recommended range (see 9.3.2). The range of arsenic concentrations in air for which this method is applicable depends in part on the sampling procedure selected by the user. The method is suitable for both individual and fixed-location sampling. Many transition metals may interfere with the determination of arsenic by hydride generation and atomic absorption spectrometry (see 10.3).