新型固相萃取器用于污染水样中痕量杀虫剂的浓缩及热解吸气相色谱-质谱分析(英文)  

ENRICHMENT OF TRACE AMOUNTS OF PESTICIDES IN POLLUTED WATER BY A NOVEL TYPE OF SOLID PHASE EXTRACTION ELEMENT FOR THEIR THERMAL DESORPTION GC/MS ANALYSIS

作　　者：WANGLi-Li HOSAKAAkihiko WATANABEChuichi 

机构地区：[1]浙江工业大学化学工程学院应用化学系，杭州310014 [2]尖端实验室，福岛963-8862，日本

出　　处：《环境化学》2003年第3期267-270,共4页Environmental Chemistry

摘　　要：A novel type of solid phase extraction element named“Magic Chemisorber” is developed for sorptive enrichment of dilute analytes from aqueous samples with high extraction efficiencies due to its capacious layer of sorbent polydimethylsiloxane.This extraction element combined with thermal desorption gas chromatography/mass spectrometry using a pyrolysis GC/MS system was applied to extract the pesticides from water samples over a concentration range of 10 -3 to 10 3 μg·l -1 .The method showed good li nearity for the tested concentration range with regression coefficients of 0 995 for over 5 decades.Limits of detection at a sub ng·l -1 (ppt)level were achieved and the reproducibility of the measurements was found to be fairly good,with relative standard deviation below 8%.A novel type of solid phase extraction element named“Magic Chemisorber” is developed for sorptive enrichment of dilute analytes from aqueous samples with high extraction efficiencies due to its capacious layer of sorbent polydimethylsiloxane.This extraction element combined with thermal desorption gas chromatography/mass spectrometry using a pyrolysis GC/MS system was applied to extract the pesticides from water samples over a concentration range of 10 -3 to 10 3 μg·l -1 .The method showed good li nearity for the tested concentration range with regression coefficients of 0 995 for over 5 decades.Limits of detection at a sub ng·l -1 (ppt)level were achieved and the reproducibility of the measurements was found to be fairly good,with relative standard deviation below 8%.

关 键 词：固相萃取器 污染水样 痕量分析 杀虫剂 浓缩 热解吸 气相色谱 质谱 

分 类 号：X132[环境科学与工程—环境科学] X832