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 in the inhalable fraction (I). Sampling is performed by drawing a defined volume of air through a membrane filter using a suitable pump. The flow rate is 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 22% and 27%.