固相微萃取-气相色谱-质谱法同时测定天然饮用水中39种有机污染物  

Simultaneous GC-MS Determination of 39 Organic Contaminants in Natural Drinking Water with Solid-Phase Micro-extraction

作　　者：罗美中[1] 李苑雯[1] 陈素娟[1] 郑彦婕[1] 

机构地区：[1]深圳市计量质量检测研究院食品及理化检测中心,深圳518131

出　　处：《理化检验（化学分册）》2013年第3期329-333,共5页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

基　　金：国家质检总局科技计划项目(2009QK326)

摘　　要：提出了固相微萃取-气相色谱-质谱法测定天然饮用水中39种有机污染物含量的方法。为使固相微萃取达到更高的效率,选用60μm PDMS/DVB作为固相萃取头的涂层,萃取温度及时间为90℃和30min,解析温度及时间为270℃和10min。用J&W DB-35 MS毛细管色谱柱分离,电子轰击离子源选择离子监测模式检测。39种有机污染物的质量浓度均在0.10～50.0μg.L-1范围内与其峰面积呈线性关系,方法的检出限(3S/N)在0.002～2μg.L-1之间。方法的回收率在82.0%～110%之间,测定值的相对标准偏差(n=6)在2.0%～13%之间。GC-MS with solid-phase micro-extraction（SPME） was applied to the determination of 39 organic contaminants in natural drinking water.To attain a higher efficiency in SPME,the 60 μm PDMS/DVB fiber was selected as coating for micro-extractor,the extraction was carried out at 90 ℃ for 30 min,and the dissolution was carried out at 270 ℃ for 10 min.The analyte were separated on JW DB-35 MS capillary column and detection was carried out by EI ion source with selecting ion monitoring mode.Linear relationships between values of peak area and mass concentration of 39 organic contaminants were kept in the same range of 0.10-50.0 μg·L-1,with detection limits（3S/N） in the range of 0.002-2 μg·L-1.Tests for recovery were performed by addition of mixed standard of the 39 organic contaminants for 6 parallel determinations,results of recovery found were in the range of 82.0%-110% with RSD′s（n=6） in the range of 2.0%-13%.

关 键 词：固相微萃取 气相色谱-质谱法 天然饮用水 有机污染物 

分 类 号：O657.63[理学—分析化学]