고분해능 질량분석장치를 이용한 동시분석법 2. 수계의 피레스로이드계 농약 |
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학술지명 한국환경분석학회
저자 최재원,김윤석
발표일 2011-03-21
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A gas chromatography-high resolution mass spectrometry (GC-HRMS) method with solid-phase extraction has been developed for the quantification of pyrethroid pesticides for water sample. Target compounds in this study were permethrin, cypermethrin, fenpropathrin, cyhalothrin(-l, -g), cyfluthrin, tefluthrin, flucythrinate and bifenthrin. To improve sensitivities for pyrethroid pesticides, framgment ions were surveyed and selected as a quantification mass with the second prior mass or molecular mass as a qualificator. Deuterium poly aromatic hydrocarbons like phenanthrene-d10 and perylene-d12 were added as a internal standards. Prior to sample analysis, disk type solid-phase extraction was validated using RPS and C18 for raw and treated water. Higher average recoveries ranged from 80% to 87% were observed in C18 disk for raw and treated water. Performance test of SPE-GC-HRMS method for pyrethroid pesticides were done with spiking test for 5 ng/L. Method detection limits (MDLs) were 0.90~7.45 ng/L with available accuracy 71~98% and precision 7.2~10.4% exept for cypermethrin(21.8%). Preliminary method application was performed with river water (n=3), surface water from apple farm (n=2) and tap water samples (n=5). Target compounds were not detected from all samples, but interfering peaks by similar fragments with different retention times were observed. |