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采用配有电子捕获检测器的气相色谱仪(GC-ECD)对不同来源的车用汽油样品中的有机氯化物进行定性和定量分析。9种有机氯化物的氯含量在各自检测范围内线性关系良好,其线性相关系数均达到0.998以上,检出限为0.01~0.94mg/L。结果表明,车用汽油中的有机氯化物主要为二氯甲烷(CH_2Cl_2)、氯丙烯(C_3H_5Cl)、三氯甲烷(CHCl_3)、1,2-二氯乙烷(C_2H_4Cl_2)、1,2-二氯丙烷(C_3H_6Cl_2)、三氯乙烯(C_2HCl_3)、四氯乙烯(C_2Cl_4)等,其他有机氯化物的含量较少。各种氯化物中氯含量的相对标准偏差均在3%以内,加标回收率在92.5%~114%之间,能够满足车用汽油中有机氯化物的日常检测需求。
Gas Chromatography with Electronic Capture Detector (GC-ECD) Qualitative and quantitative analysis of organic chlorides in automotive gasoline samples from different sources. The linearity of the nine kinds of organic chlorides in the range of 0.998 and the detection limit of 0.01 ~ 0.94 mg / L were tested. The results show that the main organic chlorides in gasoline are benzalkonium chloride (CH 2 Cl 2), allyl chloride (C 3 H 5 Cl), trichloromethane (CHCl 3), 1,2-dichloroethane (C 2 H 4 Cl 2) Chloropropane (C_3H_6Cl_2), trichlorethylene (C_2HCl_3), tetrachlorethylene (C_2Cl_4), etc., other organic chloride content is less. The relative standard deviations (RSDs) of chloride content in all kinds of chlorides were within 3% and the recoveries were between 92.5% and 114%, which could meet the routine testing requirements of organic chlorides in automotive gasoline.