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首页> 外文期刊>Journal of environmental science and health >A method for the analysis of organophosphorus pesticide residues in Mexican axolotl
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A method for the analysis of organophosphorus pesticide residues in Mexican axolotl

机译：墨西哥a中有机磷农药残留的分析方法

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摘要

A method based on matrix solid-phase dispersion (MSPD) was developed for quantitative extraction of three organophosphorus pesticides (OPPs) from the Mexican axolotl, Ambystoma mexicanum. The determination was carried out using high- performance liquid chromatography (HPLC) with diode array spectrophotometric UV detection (DAD). The MSPD extraction with octadecylsilyl (C18) sorbent combined with a silica gel clean-up and acetonitrile elution was optimised for chlorpyrifos, fenthion and methyl parathion. The method was validated, yielding recovery values higher than 90%. The precision, expressed as the relative standard deviation (RSD), was less than or equal to 6% in muscle samples at spiking levels of 10 and 5 ppm. Linearity was studied from 15 to 60 ppm for chlorpyrifos and fenthion, and from 7.5 to 30 ppm for methyl parathion. The limits of detection (LODs) were found to be less than or equal to 0.5 ppm.This method was applied to the analysis of samples from a chlorpyrifos-exposed axolotl, demonstrating its use as an analytical tool for toxicological studies.
机译：建立了一种基于基质固相分散体（MSPD）的方法，用于从墨西哥a（Ambystoma mexicanum）中定量提取三种有机磷农药（OPP）。使用高效液相色谱（HPLC）和二极管阵列分光光度紫外检测（DAD）进行测定。用十八烷基甲硅烷基（C18）吸附剂与硅胶净化和乙腈洗脱相结合的MSPD萃取对毒死rif，倍硫磷和甲基对硫磷进行了优化。该方法经过验证，回收率高于90％。在加标水平为10和5 ppm时，肌肉样品中的相对标准偏差（RSD）表示的精度小于或等于6％。毒死rif和倍硫磷的线性范围为15至60 ppm，甲基对硫磷的线性范围为7.5至30 ppm。检出限（LODs）小于或等于0.5 ppm，该方法适用于暴露于毒死a的a的样品分析，证明其可用作毒理学研究的分析工具。

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