Abstract: Seven organic compounds, including n-hexane, n-octane, methyl acetate, n-nonane, trichloromethane, 1,2-dichloropropane and 1,2-dichloroethane, in air of workshop were determined simultaneously by GC. Sampling was performed by adsorption with active carbon according to GBZ 159-2004, and the active carbon after sampling was desorbed with CS2 (1.0 mL) for 30 min. FFAP capillary chromatographic column was used for separation, and FID (at 250 ℃) was used for detection. Programmed elavation of temperature was adopted for separation. External standard method was used in determination. Values of detection limits (3S/N) were found in the range of 0.2-2.0 mg·L-1. Values of recovery found by standard addition method were in the range of 91.2% to 108%, with RSD′s (n=6) in the range of 0.27%-0.69%.