固相微萃取-气质联用测定胶州湾海水中有机锡化合物  

Determination of organotin compounds in seawater of Jiaozhou Bay by GC-MS

作　　者：张丽笑[1] 苏荣国[1] 张传松[1] 石晓勇[1] 

机构地区：[1]中国海洋大学海洋化学理论与工程技术教育部重点实验室,青岛266100

出　　处：《中国科学：化学》2010年第8期1149-1155,共7页SCIENTIA SINICA Chimica

摘　　要：采用顶空固相微萃取-气质联用(HS-SPME-GC-MS)技术测定了胶州湾海水中有机锡的含量.样品用4%的四乙基硼化钠(NaBEt4)进行衍生,同时用PDMS纤维进行萃取,萃取富集后,用气质联用仪进行测定.通过分析,该方法中MBT的线性范围为10～1000ng/L,DBT和TBT的线性范围为50～1000ng/L,相对标准偏差低于14.0%,回收率在70.0%～125.0%之间,检出限低于12.5ng/L;通过所建立的方法对胶州湾海水中有机锡的污染现状进行了调查,发现胶州湾海水中存在不同程度的有机锡污染.This paper develops an analytical method using headspace solid-phase microextraction （HS-SPME） couplded with gas chromatography-mass spectrometry （GC-MS） to determine organotin compounds in seawater of Jiaozhou Bay. The organotins were derivatized in situ with sodium tetraethylborate and adsorbed on a poly（dimethysiloxane） （PDMS）-coated fused silica fiber. According to the analysis,the linearity range of MBT is from 10 to 1000 ng/L,DBT and TBT is 50 to 1000 ng/L,with RSD. below 14%,the recoveries of three organotin compounds is 70.0%-125.0% and the detection limits is below 12.5 ng/L. Based on the established analytical method,the pollution status of organotin compounds of Jiaozhou Bay were studied.

关 键 词：顶空固相微萃取 有机锡 GC-MS 胶州湾 

分 类 号：X834[环境科学与工程—环境工程]