活性炭管吸附气相色谱法测定工作场所中环氧丙烷、环氧氯丙烷

摘要

建立了一种利用活性炭管采样，二硫化碳洗脱，DB －624UI 气相色谱柱（30 m ×0．25 mm ×1．4μm）进行分离，FID检测器检测的测定环氧丙烷和环氧氯丙烷的气相色谱方法。结果显示，环氧丙烷和环氧氯丙烷在0．5～50 mg ／L 范围内线性关系良好，方法检出限达到了0．026 mg ／m3和0．048 mg ／m3（以采集4．5 L 空气样品计）；环氧丙烷平均解析效率84．84％（RSD ＝1．770），环氧氯丙烷平均解析效率92．07％（RSD ＝2．270），适用于工作场所中环氧丙烷和环氧氯丙烷的同时测定。%An efficient and rapid method for analysing epoxypropane and epichlorohydrin was set up.The sample was absorbed by carbon tube,eluted by CS2 ,separated by the capillary-column DB-624UI:30m ×0.25mm ×1 .4μm,then detected by FID detector. Results showed that epoxypropane and epichlorohydrin had good linear relationship in the range of 0.5 ~50 mg /L.The detection limits were 0.026 mg /m3 and 0.048 mg /m3 .The average elution efficiency of epoxypropane was 84.84% (RSD =1 .770)and epi-chlorohydrin was 92.07% (RSD =2.270).This method can be applied to determine of epoxypropane and epichlorohydrin in work place,simultaneously.