毛细管柱气相色谱法测定作业场所空气中1-丁烯和1,3-丁二烯

摘要

建立作业场所空气中1-丁烯和1,3-丁二烯的直接进样气相色谱测定方法.利用TEDLAR气袋采集空气样品,以VARIAN–PLOT大口径毛细管柱分离,六通阀进样,FID检测器检测.1-丁烯,1,3-丁二烯的线性范围分别为23.3~466 mg/m3,11.3~225 mg/m3,检出限(3S/N)分别为0.08,0.03 mg/m3,相关系数均大于0.999.测定结果的相对标准偏差为0.8%~3.1% (n=6),回收率在92.0%~104.3%之间.该方法简便、快速、准确,灵敏度高,适用于作业场所空气中1-丁烯和1,3-丁二烯的检测.%The method for the determination of 1-butene and 1,3-butadiene in the air of workplace by direct injection gas chromatography was established. Air samples were collected by TEDLAR air bag, inleted with six-way valve,then analyzed by GC(FID) with VARIAN–PLOT capillary column. The linear range of 1-butene and 1,3-butadiene were 23.3–466, 11.3–225 mg/m3, respectively. The correlation coefficent was 0.999. The detection limit were 0.08, 0.03 mg/m3, respectively. The relative standard deviation of detection results was 0.8%–3.1% (n=6) and the recovery was 92.0%–104.3%. This method is rapid,sensitive and accurate, it is suitable for the determination of 1-butene and 1, 3-butadiene in the air of workplace.