顶空气相色谱质谱法测定生活饮用水中14种挥发性卤代烃

目的:建立自动顶空气相色谱质谱法测定生活饮用水中1,1-二氯乙烯、二氯甲烷、反式-1,2-二氯乙烯、氯丁二烯、顺式-1,2-二氯乙烯、三氯甲烷、四氯化碳、1,2-二氯乙烷、三氯乙烯、一溴二氯甲烷、四氯乙烯、二溴一氯甲烷、三溴甲烷、六氯丁二烯14种挥发性卤代烃的含量。方法:样品经过60℃自动顶空平衡30 min后进样,采用DB-624毛细管色谱柱分离,气相色谱质谱法定量。结果:14种挥发性卤代烃在不同浓度下线性关系良好,相关系数为0.9950~0.9999;加标回收率为95.75%~100.67%;精密度为0.41%~3.58%。结论:本方法可以一次性完成生活饮用水中14种挥发性卤代烃的含量测定,方法简便、快速、准确,能充分满足生活饮用水的检测要求。

Determination of 14 Kinds of Volatile Halogenated Hydrocarbons in Drinking Water by Headspace-GC-MS

Objective:To establish a method for determination of 14 kinds of volatile halogenated hydrocarbons including 1,1-dichloroethene,dichloromethane,trans-1,2-dichloroethene,chloroprene,cis-1,2-dichloroethene,trichloromethane,tetrachloromethane,1,2-dichloroethane,trichloroethene,bromodichloromethane,tetrachloroethene,dibromochloromethane,tribromomethane,hexachloro-1,3-butadiene in drinking water. Methods:The sample were automatically headspace balanced at 60℃ for 30 min before injection. The samples were separated by capillary chromatography column DB-624 and quantified by gas chromatography-mass spectrometry. Results:The linear relationship of 14 kinds of volatile halogenated hydrocarbons at different concentrations were good,and the correlation coefficient was 0.9950~0.9999. The recoveries were 95.75%~100.67% and the precisions were 0.41%~3.58%. Conclusion:The method is accurate and easy to determine the content of 14 kinds of volatile halogenated hydrocarbons in drinking water at one time.