Research Inst. of Subtropical Forestry, Chinese Academy of Forestry, Fuyang, 311400, PR China.
J Food Sci. 2013 Feb;78(2):T372-6. doi: 10.1111/1750-3841.12017. Epub 2013 Jan 14.
Due to the widespread use and potential toxicity of organophosphorous pesticides (OPs), multiresidue monitoring of OPs in camellia oil has become increasingly important. A simple, rapid, and effective matrix solid-phase dispersion extraction for the determination of 15 organophosphorous pesticides in camellia oil is described. Related important factors influencing the extraction efficiency, such as type of sorbent material, eluting solvent, and ratio of sample/sorbent were studied and optimized. The best results were obtained using 0.5 g of camellia oil, 1.5 g of white carbon black as dispersant sorbent, and 5 mL of acetonitrile: ethyl acetate (2:1, V/V) as eluting solvent. Method validation was performed in order to study sensitivity, linearity, precision, and accuracy. Average recoveries ranged between 76.7% and 102.9% with relative standard deviation values from 2.9% to 13.7% at 2 concentration levels (10 and 100 μg/kg). The method limit of detection at or below the regulatory maximum residue limits for the pesticides was achieved.
A simple, rapid, and effective method for multiresidue determination of organophosphorous pesticides in camellia oil was developed. The sample preparation could finish in 5 min.
由于有机磷农药（OPs）的广泛使用和潜在毒性，对茶籽油中 OPs 的多残留监测变得越来越重要。本文描述了一种简单、快速、有效的基质固相分散萃取法，用于测定茶籽油中的 15 种有机磷农药。研究并优化了影响萃取效率的相关重要因素，如吸附剂材料的类型、洗脱溶剂和样品/吸附剂的比例。使用 0.5 g 茶籽油、1.5 g 白炭黑作为分散吸附剂和 5 mL 乙腈：乙酸乙酯（2:1，V/V）作为洗脱溶剂，可获得最佳结果。为了研究灵敏度、线性、精密度和准确性，对方法进行了验证。在两个浓度水平（10 和 100 μg/kg）下，平均回收率在 76.7%至 102.9%之间，相对标准偏差值在 2.9%至 13.7%之间。该方法的检测限达到或低于农药的监管最大残留限量。
开发了一种简单、快速、有效的茶籽油中有机磷农药多残留测定方法。样品制备可在 5 分钟内完成。
