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目的建立饮用水中有机磷农药残留的膜萃取-气相色谱快速测定方法。方法将1000ml水样置入活化了的C18固相圆盘膜萃取装置,抽滤萃取,用10ml乙酸乙酯洗脱,无水硫酸钠脱水,氮吹至少于1ml,定容至1ml,进样2μl,气相色谱仪测定。结果本法加标回收率在81.8%～123%之间,方法精密度(RSD)在2.67%～24.0%之间,不同有机磷农药检出限在0.006～0.35μg/L之间,定量下限在0.022～1.2μg/L之间。结论本法简单、准确、灵敏、结果重现性好、定性结果可靠、适用于水中痕量有机磷农药的测定。
Objective To establish a rapid method for the determination of organophosphorus pesticide residues in drinking water by membrane extraction and gas chromatography. Methods 1000ml water sample was put into the activated C18 solid-phase disk membrane extraction device, extracted by suction filtration, eluted with 10ml ethyl acetate, dehydrated with anhydrous sodium sulfate, nitrogen was blown to less than 1ml, volume to 1ml, 2μl, gas chromatograph. Results The recoveries of this method were in the range of 81.8% ~ 123% with RSDs of 2.67% ~ 24.0%. The detection limits of different organophosphorus pesticides ranged from 0.006 ~ 0.35 μg / L. The lower limit of quantification 0.022 ~ 1.2μg / L between. Conclusion The method is simple, accurate, sensitive and reproducible. It has good qualitative results and is suitable for the determination of trace organophosphorus pesticides in water.