吹扫捕集—气相色谱联用法快速测定水中20种挥发性有机物
2016-03-01刘超李添宝
刘超 李添宝



摘 要 建立了水中挥发性卤代烃和苯系物的吹扫捕集-气相色谱联用分析方法,对色谱条件和吹扫捕集条件进行了优化,在21 min内完成了对水中20种挥发性卤代烃和苯系物的一次性进样和定性定量分析.方法加标回收率在85.8%~104.8%之间,相对标准偏差在2.0%~6.5%之间,最低检测限在0.10~0.50 μg/L之间,实验结果表明该方法操作简捷,灵敏度高,能够满足水中挥发性卤代烃和苯系物的分析检测需要.
关键词 水;有机污染物;吹扫捕集;气相色谱
中图分类号 O6577 文献标识码 A 文章编号 1000-2537(2015)04-0052-05
Abstract The analytical method using purge and trap gas chromatography of volatile organic compounds including halogenated hydrocarbons and benzene series in water was established and the conditions of purge and trap were optimized in order to accomplish one-time sample injection, one-time qualitative and quantitative analysis of 20 kinds of volatile halogenated hydrocarbons and benzene series within 21 minutes. The addition standard recovery of this method is 85.8%~104.8%, the relative standard deviation is 2.0%~6.5%, and the lowest detection limit is 0.10~0.50μg/L. The results show that the method is simple with high sensitivity, which can meet the requirments in analysis and detection of volatile halogenated hydrocarbons and benzene series in water.
Key words water; organic pollutant; purge and trap; gas chromatography
随着科学技术的不断创新,人类在享受科技迅速发展所带来的舒适和方便的同时,也品尝着盲目和短视造成的生存环境不断恶化的苦果.化学工业等过程工业在生产过程中广泛使用有毒有害物质,对包括水资源在内的环境造成严重的污染.在各种污染中,有机污染物种类越来越多,美国环境保护局颁布的“清洁水法”修正案中明确规定了65类129种优先污染物和中国环境监测总站提出的“中国水环境优先控制污染物黑名单”[1] 68种中,包括多种挥发性卤代烃和苯系物,这些物质具有“三致”(致癌、致畸、致突变)效应和遗传毒性[2],对人类健康危害很大[3].因此,对水中挥发性卤代烃和苯系物进行快速、准确分析的要求也越来越迫切.
挥发性卤代烃和苯系物的检测方法常采用顶空法和吹扫捕集法进样[4-5],本文在现有分析方法的基础上,对吹扫捕集条件和色谱条件进行优化,采用吹扫捕……
