固相萃取气相色谱法测定茶叶中5种有机磷农药残留

发布时间：2018-01-08 21:20

本文关键词：固相萃取气相色谱法测定茶叶中5种有机磷农药残留　出处：《吉林医药学院学报》2016年01期 　论文类型：期刊论文

【摘要】：目的建立固相萃取气相色谱法同时测定茶叶中敌敌畏、甲胺磷、乙酰甲胺磷等5种有机磷农药残留。方法样品用固相萃取法萃取,乙酸乙酯/丙酮混合液洗脱,旋转蒸发仪浓缩,丙酮溶解定容,气相色谱柱分离后检测。检测器温度260℃,进样口温度250℃。燃气为氢气,流速80 m L/min。载气为氮气,流速10 m L/min。助燃气为空气,流速为100 m L/min。结果该方法检出限为0.01~0.02 mg/kg。当加入标准溶液的浓度为0.25 mg/kg时,加标回收率为74.9%~88.9%,RSD在2.4%~10.3%范围之间;当加入标准溶液的浓度为1.0 mg/kg时,加标回收率为87.9%~100%,RSD在1.7%~5.0%范围内。结论固相萃取气相色谱法检测效率高,适合大量样品的筛选和检测。
[Abstract]:Objective to establish the determination of dichlorvos, solid phase extraction and gas chromatography of methamidophos, acephate and other 5 kinds of organophosphorus pesticide residues. Methods samples by solid phase extraction, ethyl acetate / acetone mixed eluent, rotary evaporator concentration, volume of acetone dissolved gas chromatography column separation detection. The detector temperature of 260 DEG C, the inlet temperature is 250 degrees centigrade. The gas flow rate of 80 m L/min. for hydrogen, nitrogen as the carrier gas, auxiliary gas flow rate of 10 m L/min. for the air flow rate is 100 m L/min. the detection limit was 0.01~0.02 mg/kg. when adding standard solution concentration was 0.25 mg/kg, and the recovery rate was 74.9%~88.9%, RSD in 2.4%~10.3% range; when the concentration of standard solution is added to 1 mg/kg, and the recovery rate was 87.9%~100%, RSD in the range of 1.7%~5.0%. Conclusion the solid phase extraction gas chromatography high detection efficiency, suitable for mass screening and testing samples. Test.

【作者单位】：吉林医药学院公共卫生学院;
【分类号】：R155.5;O657.71
【正文快照】： 我国是茶叶的故乡,是世界上最早发现茶树的国家,也是世界上最大的茶叶生产国和出口国。茶叶与可可和咖啡并称世界三大饮料,是人们日常生活的必需品。为了提高茶叶的产量,预防茶树病虫害的发生,茶农会使用农药来解决这些问题。由于农药的使用不当,导致茶叶中农药残留问题十分突

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