河川水中における内分泌攪乱作用が疑われる農薬類のガスクロマトグラフィー/質量分析法による定量 (<特集>環境ホルモンと分析化学)

概要

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A solid-phase extraction-gas chromatography/mass spectrometric method was applied to determine endocrine disrupting pesticides in river-water samples. The target compounds were seven pesticides (cypermethrin, ethylparathion, fenvalerate, metribuzin, nitrofen, permethrin and vinclozolin). A water sample of 500 ml was passed through a Sep-Pak PS-2 cartridge. The pesticides were eluted with 4 ml of acetone and 4 ml of hexane, and then 4ml of ethyl acetate. The eluate was concentrated to 1ml and determined by GC/MS. The overall recoveries from ground water were 80% to 107%, except for pyrethroids (cypermethrin, fenvalerate and permethrin). A membrane-extraction disk (SDB-XC) was also applied to determine these pesticides and another six pesticides (alachlor, atrazine, carbaryl, malathion, simazine and trifluralin). Pesticides in a water sample of 500 ml were extracted using a membrane disk, and then eluted by 20 ml of ethyl acetate. After dehydration, the eluate was concentrated and determined by GC/MS. Pyrethroids can be extracted relatively well by this method. The overall recoveries of all the target compounds from ground water and river water were 49% to 99% and 56% to 112%, respectively. The limits of quantification in water were 0.1μg 1^<-1> to 0.2μg1^<-1>.
社団法人日本分析化学会の論文
1999-06-05