根据农药溶剂中挥发性气体的特性，选用定制的plot毛细管色谱柱与中等极性毛细管色谱柱作为分离系统，利用气体传感器进行浓度识别，对农药溶剂中的挥发性气体进行分析检测。设计制作了预处理系统完成样品气体的采集与进样，通过色谱系统进行分析检测。针对农药溶剂挥发性气体：乙醇、丙酮、异丙醇、乙酸乙酯、苯和甲苯的混合气体进行检测，苯的检测体积分数可以达到1×10^-6，乙醇的检测体积分数可以达到2×10^-6。

According to the characteristics of volatile gases in pesticide solvent,a customized plot capillary column and a medium polarity capillary column are selected as the separation system.The concentration of volatile gases in pesticide solvent is identified by gas sensors.The pre-treatment system is designed and prepared to collect and inject the sample gas,and the analysis and detection are carried out by chromatographic system.Volatile gases in pesticide solvent are detected by this method,including ethanol,acetone,isopropanol,ethyl acetate,benzene and toluene.The detection concentration of benzene can reach 1×10^-6,and that of ethanol can reach 2×10^-6.