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%.
出处
《环境化学》
CAS
CSCD
北大核心
2003年第3期267-270,共4页
Environmental Chemistry
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
solid phase extraction element,absorption dynamic range,polydimethylsiloxane,thermal desorption GC/MS,pesticide analysis.
