吹扫捕集-气质联用法测定天然饮用水中挥发性有机物  

Determination of volatile organic compounds in natural drinking water by purge and trap-gas chromatography/mass Spectrometry

作　　者：罗美中[1] 李苑雯[1] 郑彦婕[1] 陈素娟[1] 黎永乐[1] 

机构地区：[1]深圳市计量质量检测研究院,广东深圳518000

出　　处：《食品与发酵工业》2013年第3期171-175,共5页Food and Fermentation Industries

基　　金：国家质检总局科技项目<天然饮用水中有机污染物快速检测技术研究>(2009QK326)

摘　　要：采用吹扫捕集-气相色谱/质谱联用法,测定天然饮用水中35种挥发性有机化合物,包括三卤甲烷、卤代苯类、苯系物以及多环芳烃类等。方法检出限范围为0.05～0.17μg/L,35种有机物加标5μg/L测定回收率为86.5%～113%,RSD(n=6)为1.6%～6.1%。调研了市售的44个瓶装天然饮用水和5个水源水样品:瓶装天然饮用水中检出1,2-二氯乙烷、一氯二溴甲烷、二氯一溴甲烷、三溴甲烷、苯、三氯甲烷、1,2,4-三甲苯、甲苯共8个化合物,其中三氯甲烷的检出率达到49%,但检测结果均在相关标准的限量要求范围内;水源水样品中均未测得挥发性有机化合物。A purge and trap（P＆T） method coupled with gas chromatography/mass spectrometry has been devel- oped for the determination of 35 volatile organic compounds（VOCs） in natural drinking water, including Trihalometh- an, Halogenated benzene, Benzene, Toluene, Ethylbenzene, and Xylenes （BTEX） , Polycyclic aromatic hydrocar- bons. The threshold were ranged from 0.05 to 0.17 μg/L, the recoveries of the 35 compounds spiked at 5 μg/L were between 86.5% and 113% with RSD （n = 6） 1.6% -6.1%. There were 44 samples from markets and 5 samples from water source collected and analyzed. There were 8 compounds including 1,2-dichloroethane, chlorodibromometh- ane, bromodichloromethane, bromoform, benzene, chloroform, 1,2,4-trimethylbenzene, toluene detected from the water samples, the detectable rate of chloroform were 49%. All concentration results obtained were within the require- ments of relevant regulation value. None of VOCs was detected from the samples.

关 键 词：天然饮用水 挥发性有机化合物 吹扫捕集 三卤甲烷 

分 类 号：R123.1[医药卫生—环境卫生学] O657.63[医药卫生—公共卫生与预防医学]