This analytical method is a validated measurement procedure for the determination of benzene [71-43-2] in workplace air averaged over the sampling period after personal or stationary sampling. Sampling is performed by drawing a defined volume of air through an adsorption tube filled with carbon black using a suitable flow-regulated pump. For sampling the flow rate is set to 0.33 l/min with an air sample volume of 40 l (which corresponds to a sampling period of 2 h). For analysis the sample is treated with carbon disulfide and analysed by means of GC with a mass spectrometric detector (MSD). The quantitative evaluation is based on a calibration function obtained by means of a multiple-point calibration. The relative limit of quantification (LOQ) is 4 μg/m³ benzene for an air sample volume of 40 l. The mean recovery was 100% for an evaluation with MSD and the expanded uncertainty lays between 21 and 23%.