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首页> 外文期刊>Chromatographia >Solid-Phase Microextraction Gas Chromatography for Determination of Some Organophosphorus Pesticides
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Solid-Phase Microextraction Gas Chromatography for Determination of Some Organophosphorus Pesticides

机译：固相微萃取气相色谱法测定某些有机磷农药

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摘要

A simple and rapid solid-phase microextraction (SPME) method is presented based on activated charcoal–PVC fiber for determination of some organophosphorus pesticides from aqueous samples in direct mode SPME. After optimization of the experimental variables affecting SPME of the target compounds from aqueous solutions, the proposed method was applied to determine pesticides in fruit juice. The analytes in this procedure were preconcentrated for 15 min on the SPME fiber and subsequently desorbed by heating the fiber at 200 °C for 5 min in the GC injection port. Separation was on a capillary column GC followed by flame ionization detection. Recoveries of the pesticides studied in aqueous samples ranged 42%–63% and repeatability for all analytes was < 9% for a single fiber. Fiber-to-fiber reproducibility was < 18%.
机译：提出了一种基于活性炭-PVC纤维的简单，快速的固相微萃取（SPME）方法，用于以直接模式SPME测定含水样品中的某些有机磷农药。优化影响水溶液中目标化合物SPME的实验变量后，将该方法用于果汁中农药的测定。将此过程中的分析物在SPME纤维上预浓缩15分钟，然后通过在GC进样口中将纤维在200°C加热5分钟来解吸。在毛细管柱GC上进行分离，然后进行火焰离子化检测。在含水样品中研究的农药的回收率在42％–63％之间，单根纤维的所有分析物的重复性均<9％。光纤到光纤的重现性<18％。

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