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Position: Home > Articles > Determination of Pymetrozine Residues in Fruits and Vegetables by Dispersive Liquid-Liquid Microextraction and Fluorescence Spectrophotometry Agrochemicals 2017 (6) 434-436+449

分散液相微萃取荧光法测定果蔬中残留吡蚜酮

作  者：
齐畅;刘美欧;杨珊珊;常潇晨;李月秋;张爱霞
单  位：
河北大学预防医学与卫生事业管理系;国家谷子改良中心河北省杂粮重点实验室河北省农林科学院谷子研究所;河北大学医学综合实验中心
关键词：
吡蚜酮;分散液相微萃取;十二烷基硫酸钠(SDS);荧光分光光度法
摘  要：
[目的]利用分散液相微萃取和表面活性剂增敏,建立果蔬中吡蚜酮残留量的荧光分光光度快速测定法。[方法]用二氯甲烷作为萃取剂,丙酮作为分散剂对样品进行前处理。以水作溶剂,320μL十二烷基硫酸钠(SDS)(0.1 mol/L)作增敏剂,室温静置10 min。1 cm石英比色皿作吸收池,于激发波长(λ_(ex))312 nm、发射波长(λ_(em))349 nm处测定荧光强度。[结果]在0.02~1.00 mg/L范围内,吡蚜酮浓度与荧光强度线性关系良好,检出限为0.0196 mg/kg。加标回收率为87.73%~99.06%,RSD为2.93%~9.67%。[结论]新建方法可用于水果蔬菜中吡蚜酮残留测定。
译  名：
Determination of Pymetrozine Residues in Fruits and Vegetables by Dispersive Liquid-Liquid Microextraction and Fluorescence Spectrophotometry
作  者：
QI Chang;LIU Mei-ou;YANG Shan-shan;CHANG Xiao-chen;LI Yue-qiu;ZHANG Ai-xia;Hebei University,Department of Preventive Medicine and Management;Hebei University,Center of Medical Comprehensive Experimental;National Millet Improvement Center,Key Laboratory of Minor Cereal Crops of Hebei Province,Institute of Millet Crops,Hebei Academy of Agriculture and Forestry Sciences;
关键词：
pymetrozine;;dispersive liquid-liquid microextraction;;sodium dodecyl sulfate(SDS);;fluorescence spectrophotometry
摘  要：
[Aims] A rapid method for determination of pymetrozine residues in fruits and vegetables by fluorescence spectrophotometry combined with dispersive liquid-liquid microextraction was established. [Methods] The samples were pretreated with dichloromethane as the extractant and acetone as the dispersant. Then, water was used as solvent,320 μL of sodium dodecyl sulfate(SDS)(0.1 mol/L) was added in solution as sensitizer. The sample solution was kept at room temperature for 10 minutes. Quartz cuvette(1 cm) was used as absorption cell. The fluorometric analysis of the sample was performed at the excitation wavelength( λ_(ex)) of 312 nm and the emission wavelength(λ_(em)) of 349 nm.[Results] The linear correlation coefficient of the calibration curve was 0.9965 when the concentration was 0.02-1.00 mg/L. The limit of detection was 0.0196 mg/kg. The recovery rate was 87.73-99.06% with the relative standard deviation of 2.93-9.67%. [Conclusions] The method can be used to determine the pymetrozine residues in fruits and vegetables.

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