QuEChERS-气相色谱法检测苹果中的乐杀螨

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Detection of Binapacryl in Apples by QuEChERS-Gas Chromatography Method

FENGHuayi,DENG Xiaojie,LIUHuanqun,LING Antong,LIANG Fengzhen (China Certification & Inspection Group Guangxi Co., Ltd.,Fangchenggang , China)

Abstract: This paper establishes a method for the determination of binapacryl in apples by QuEChERS-gas chromatography. Apple samples were extracted with acetonitrile and QuEChERS.The supernatant was purified with purification powder,and after nitrogen blowing to replace the solvent, it was passed through the membrane and determined on the machine.The detection was carried out by gas chromatograph and DB17Ol column,and the quantification was done byexternal standard method.The results showed thatthis method had a good linear relationship with binapacryl, with a correlation coefficient of 0.997,a detection limit of 0.001mg⋅kg-1 ,and a quantification limit of 0.010mg.kg-1 . At the three spiked levels of low, medium and high, the average recovery rate was 95.2% to 105.8% ,and the relative standard deviation was 1.0% to 6.0% .This method meets the experimental requirements and is suitable for the quantitative detection of binapacryl in apples.

Keywords: QuEChERS pretreatment; binapacryl; gas chromatograph; apple

乐杀螨是非内吸性杀螨剂、杀菌剂，对于螨虫类有显著杀菌效果，且可作用于螨虫的各个阶段，如成虫阶段、幼虫阶段、卵阶段，用于苹果上多种害螨的防治工作，且防治后螨类不易产生抗体[1]。（剩余5671字）