Abstract: The contents of short-chain chlorinated paraffin (C10-C13) in rubber products were determined by GC with electron capture detector. The sample was extracted ultrasonically with a mixture of n-hexane and acetone (1+1) and separated on HP-5 quartz capillary column (30 m×0.35 mm, 0.25 μm). Linear relationship between values of peak area and mass concentration of short-chain chlorinated paraffin was obtained in the range within 100 mg·L-1, with lower limits of determination of 20 mg·kg-1. Values of recovery found were in range of 92.4%-100.4%, and values of RSD′s (n=6) found were in range of 1.8%-4.5%.