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Determination of Organophosphorus Pesticides in Rice by TLC

机译:薄层色谱法测定水稻中的有机磷农药

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摘要

Multi-residue analysis of organophosphorus pesticides (OPs) in rice was studied. Semi-automatic gel permeation chromatography was used to clean-up the extracts. The organophosphorus pesticides were analyzed by TLC-cholinesterase inhibition method and GC-FPD methods. The minimum detectable quantities (MDQ), R_f and RR_f values of pesticides by TLC were determined. The average recoveries of organophosphorus pesticides from fortified rice samples at three different levels were 75-88 % by TLC and 82-93 % by GC. Comparison of the results with GC showed that TLC method was less sensitive than GC, but it could be used by monitoring laboratories to carry out the preliminary screening of samples in order to supplement instrumental analyses.
机译:研究了水稻中有机磷农药(OPs)的多残留分析。使用半自动凝胶渗透色谱法纯化提取物。用TLC-胆碱酯酶抑制法和GC-FPD法分析有机磷农药。薄层色谱法测定了农药的最小可检测量(MDQ),R_f和RR_f值。强化大米样品中三种不同水平的有机磷农药的平均回收率(TLC)为75-88%,气相色谱为82-93%。与气相色谱法的结果比较表明,薄层色谱法比气相色谱法灵敏度低,但可用于监测实验室进行样品的初步筛选,以补充仪器分析。

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