生活饮用水中7种挥发性卤代烃的吹扫-捕集气相色谱测定法  

DETERMINATION OF SEVEN VOLATILE HALOGENATED HYDROCARBONS IN DRINKING WATER BY GAS CHROMATOGRAPHY(GC)WITH SWEEP-CAPTURE

作　　者：巢秀琴 曹杰[1] 

机构地区：[1]镇江市疾病预防控制中心,镇江212003

出　　处：《现代预防医学》2011年第23期4933-4936,共4页Modern Preventive Medicine

摘　　要：[目的]建立同时测定生活饮用水中7种挥发性卤代烃的吹扫-捕集气相色谱测定方法。[方法]水中的微量卤代烃经吹扫-捕集仪吹扫捕集后,联机进样入气相色谱仪,应用DB—l7毛细管色谱柱,采用程序升温的方式进行GC分析(ECD检测器),以保留时间定性,外标法定量。[结果]7种挥发性卤代烃的最低检出浓度为0.01～0.06μg/L,最低定量浓度为0.03～0.20μg/L,水样加标回收率为90.6%～106.9%,RSD为1.78%～6.49%。在对镇江市16份自来水水样的分析中除三氯乙烯外其他6种挥发性卤代烃均有检出。[结论]所建立的分析方法灵敏、简便、准确、可同时测定多种挥发性卤代烃。[Objective]To establish a simple and sensitive gas chromatographic method for the simultaneous determination of seven volatile halogenated hydrocarbons in drinking water.[Methods]The separation was performed on a DB—l7 capillary column.Temperature programming and an ECD detector were applied.Retention time was qualitative and external reference method was quantitative.[Results]The detection limits of seven volatile halogenated hydrocarbons varied from 0.01 to 0.06μg/L.The minimum quantitation concentration varied from 0.03 to 0.20μg/L.Mean recovery of volatile halogenated hydrocarbon standards added to water samples varied from 90.6% to 106.9%,the relative standard deviation was 1.78%-6.49%.Six volatile halogenated hydrocarbons,except for trichloroethylene,were detected in 16 water samples.[Conclusion]The method is sensitive,convenient and accurate,and can be applied to determine many kinds of volatile halogenated hydrocarbons in drinking water.

关 键 词：吹扫-捕集气相色谱法 生活饮用水 挥发性卤代烃 

分 类 号：R123[医药卫生—环境卫生学]