提出了气相色谱法测定橡胶制品中短链氯化石蜡(C10~C13)含量的方法。样品经正己烷-丙酮(1+1)混合溶液超声提取,采用HP-5石英毛细管色谱柱(30 m×0.35 mm,0.25 μm)分离,电子捕获检测器检测。短链氯化石蜡的质量浓度在100 mg·L-1以内与其峰面积呈线性关系,测定下限为20 mg·kg-1。方法的回收率在92.4%~100.4%之间,相对标准偏差(n=6)在1.8%~4.5%之间。

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%.