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首页> 外文期刊>Journal of environmental science and health >Evaluation of pressurized liquid extraction for determination of organophosphorus and pyrethroid pesticides in soybean
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Evaluation of pressurized liquid extraction for determination of organophosphorus and pyrethroid pesticides in soybean

机译：加压液体萃取法测定大豆中有机磷和拟除虫菊酯农药的评价

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摘要

The purpose of this study was to develop an analytical method for the determination of organophosphorus and pyrethroid pesticides in soybean by pressurized liquid extraction (PLE). Two organic solvents, acetone and acetonitrile, were evaluated as extraction solvents. In both cases, the amount of extract was enhanced with increasing extraction temperature. The extracts obtained using acetonitrile were measured by gas chromatography/mass spectrometry after a cleanup process based on the analytical method for the Japanese Positive List System for Agricultural Chemicals Remaining in Foods. The effect of extraction temperature (range: 40-130℃) on extraction efficiency was evaluated by a recovery study using 21 organophosphorus pesticides and 10 pyrethroid pesticides as target analytes and acetonitrile as the solvent. The results indicated that at 130℃, some organophosphorus pesticides might be degraded, whereas extraction temperatures between 70℃ and 100℃ were optimal. Next, a prepared sample containing fenitrothion and permethrin was analyzed. Although the sample was not soaked in water prior to analysis, PLE provided analytical results comparable to those obtained by solvent extraction with homogenization. Therefore, PLE is considered a simple and alternative technique for the extraction of organophosphorus and pyrethroid pesticides in soybean.
机译：这项研究的目的是开发一种通过加压液体萃取（PLE）测定大豆中有机磷和拟除虫菊酯农药的分析方法。评价了两种有机溶剂，丙酮和乙腈作为萃取溶剂。在两种情况下，提取物的量均随着提取温度的升高而增加。根据日本食品残留农药肯定清单系统的分析方法，在净化过程后，通过气相色谱/质谱法测量使用乙腈获得的提取物。以21种有机磷农药和10种拟除虫菊酯类农药为目标分析物，以乙腈为溶剂进行回收率研究，评价了萃取温度（40-130℃）对萃取效率的影响。结果表明，在130℃时，某些有机磷农药可能会降解，而提取温度在70℃至100℃之间是最佳的。接下来，分析了制备的含有杀nitro硫酮和苄氯菊酯的样品。尽管分析之前样品未浸泡在水中，但PLE提供的分析结果与通过均质溶剂萃取获得的结果相当。因此，PLE被认为是一种提取大豆中有机磷和拟除虫菊酯农药的简单且可替代的技术。

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