顶空固相微萃取-色谱质谱联用测定饮用水中二甲基异冰片和土味素  

2-Methylisoborneol and Geosmin Detection by Headspace Solid Phase Microextraction Procedure and Gas Chromatograph with Mass Spectrometry in Drinking Water

作　　者：白晓慧[1] 孟明群[2] 贾程慎[1] 

机构地区：[1]上海交通大学生命科学技术学院水质科学与工程实验室,上海200240 [2]上海市供水调度监测中心,上海200100

出　　处：《中国环境监测》2010年第3期14-16,共3页Environmental Monitoring in China

基　　金：水体污染控制与治理科技重大专项资助项目(2009ZX07421-005)

摘　　要：研究了顶空固相微萃取-气相色谱质谱联用测定饮用水中二甲基异冰片和土味素的方法。结果表明,当选用聚二甲基硅氧烷(PDMS)萃取纤维萃取头,萃取温度为60℃,萃取时间为40min时,得到二甲基异冰片标准曲线方程为y=122.59+157.76x,相关系数(R)0.9998;土味素的标准曲线方程为y=14.847+180.99x,相关系数(R)0.9999;检出限为0.1ng/L,相对标准偏差在0.99%～4.05%之间,加标回收率86.4%～109.5%。Trace amounts of geosmin（trans-1,10-dimethyl-trans-9-decalol） and MIB（2-methylisoborneol） in drinking water was identified and quantifed by using headspace solid phase microextraction procedure（HSPME） and gas chromatograph with mass spectrometry.Results showed that,after extracting geosmin and MIB for 40 minutes under the extraction condition of 65μm PDMS/DVB fibre,60℃ water bath,the standard curve equations of geosmin and MIB were y=122.59＋157.76x and y=14.847＋180.99x;the correlation coefficient of initial calibration curve of geosmin and MIB maintained above 0.999;the detection limit is 0.1ng /L;the spiked recovery and the relative standard deviation were 86.4%～109.5% and 0.99%～4.05% respectively.

关 键 词：饮用水 二甲基异冰片 土味素 顶空固相微萃取 气相质谱-色谱联用 

分 类 号：X832[环境科学与工程—环境工程]