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Multiresidue Method for Determination of 23 Pesticides in Refined Sugar

机译：多残渣法测定精制糖中的23种农药

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摘要

A rapid and cost effective multiresidue GLC method has been developed for the analysis of 23 pesticides comprising organochlorines (α-HCH, β-HCH, γ-HCH, δ-HCH, p,p-DDD, p,p-DDE, p,p'-DDT, α-endosulfan, β-endosulfan, endosulfan sulphate), synthetic pyrethroids (bifenthrin, fenpropathrin, λ-cyhalothrin, fluvalinate, α-methrin, fenvalerate, deltamethrin), organo-phosphates (dimethoate, parathion-methyl, chlorpyriphos, malathion, ethion) and fipronil for refined sugar. The representative samples were fortified at lower and higher levels ranging from 10.0-54.5 μg g~(-1) and 40-218 μg g~(-1), respectively. At lower and higher levels of fortification, the recoveries ranged from 82.6-100.8% and 90,7-114.1 %, respectively. Based on the lower level of fortification, the limit of quantitation (LOQ) ranged between 3.80-6.78 ng g~(-1) for organochlorines, 2.90-25.85 μg g~(-1) for organophosphates, 1.96-32.08 μg g~(-1) for synthetic pyrethroids and 3.95 μg g~(-1) for fipronil. The present method being cost-effective, simple, reproducible and giving recoveries more than 82 % for all the 23 pesticides, could be further tested for the inter laboratory validation for monitoring of refined sugar.
机译：已开发出一种快速且经济高效的多残留GLC方法，用于分析23种包含有机氯的农药（α-HCH，β-HCH，γ-HCH，δ-HCH，p，p-DDD，p，p-DDE，p， p'-DDT，α-硫丹，β-硫丹，硫丹硫酸盐，合成拟除虫菊酯（联苯菊酯，联苯菊酯，λ-氯氟氰菊酯，氟伐林酸酯，α-甲基苯丙酸，氰戊菊酯，溴氰菊酯），有机磷酸酯（二甲磺酸盐，对硫磷，甲基吡啶硫磷） ，马拉硫磷，乙硫磷）和氟虫腈制成精制糖。代表性样品的强化水平分别为10.0-54.5μgg〜（-1）和40-218μgg〜（-1）。在较低和较高的设防水平下，回收率分别为82.6-100.8％和90,7-114.1％。根据较低的设防水平，有机氯的定量限（LOQ）为3.80-6.78 ng g〜（-1），有机磷酸盐的定量限为2.90-25.85μgg〜（-1），1.96-32.08μgg〜（合成拟除虫菊酯为-1），氟虫腈为3.95μgg〜（-1）。本方法经济高效，简单，可重现，并且对所有23种农药的回收率均超过82％，可以进一步测试以用于实验室间验证以监测精制糖。

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