分析与检测

高效液相色谱-四级杆-飞行时间质谱法测定荔枝果实中29种农药多残留

  • 王思威 ,
  • 刘艳萍 ,
  • 丁晓波 ,
  • 李景明
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  • 1(广东省农业科学院 植物保护研究所, 农业农村部华南果蔬绿色防控重点实验室, 广东省植物保护新技术重点实验室,广东 广州,510640)
    2(泸州市农业科学研究院,四川 泸州,646000)
第一作者:博士,副研究员(丁晓波高级农艺师和李景明高级农艺师为共同通信作者,E-mail:dingxiaobo9@163.com;ljmljm126@126.com)

收稿日期: 2024-01-24

  修回日期: 2024-04-10

  网络出版日期: 2024-08-02

基金资助

国家荔枝龙眼产业技术体系项目(CARS-32);2021年省级乡村振兴战略专项省级项目(粤农农函[2021]21号);广东省农业科学院科技创新战略专项资金青年导师制(R2018QD-065);乡村振兴战略专项资金(农业科技能力提升)(2023TS-2-5,2023TS-2-3);广州市科技计划项目(2024E04J0596);广东省基础和应用基础研究基金(2022A1515110473)

High-performance liquid chromatography-tandem quadrupole-time of flight-mass spectrometry for determination of 29 pesticides in litchi

  • WANG Siwei ,
  • LIU Yanping ,
  • DING Xiaobo ,
  • LI Jingming
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  • 1(Institute of Plant Protection, Guangdong Academy of Agricultural Sciences, Key Laboratory of Green Prevention and Control on Fruits and Vegetables in South China Ministry of Agriculture and Rural Affairs, Guangdong Provincial Key Laboratory of High Technology for Plant Protection, Guangzhou 510640, China)
    2(Luzhou Academy of Agricultural Sciences, Luzhou 646000, China)

Received date: 2024-01-24

  Revised date: 2024-04-10

  Online published: 2024-08-02

摘要

采用高效液相色谱-四极杆-飞行时间质谱技术结合优化的QuEChERS方法,建立了荔枝全果中29种农药的多残留检测分析方法。样品经乙腈提取,利用无水硫酸镁吸水和氯化钠盐析作用,进行离心分层后,取部分乙腈上清液进行净化,净化剂为无水MgSO4、N-丙基乙二胺吸附剂、石墨化碳黑吸附剂,采用电喷雾离子源正负离子交换扫描方式对29种农药数据信息进行采集。29种农药在质量浓度0.001~0.2 mg/L内具有较好线性相关性(相关系数R2均大于0.99), 在3个添加水平(0.01、0.1、0.5 mg/kg)下,29种农药的回收率均值为70.2%~102.4%,相对标准偏差为2.4%~6.2%。方法检出限为0.1~3 μg/kg,定量限为0.3~10 μg/kg。该方法具有操作便捷、回收率高和灵敏度高等特点,可用于同时快速测定荔枝中29种农药的多残留。

本文引用格式

王思威 , 刘艳萍 , 丁晓波 , 李景明 . 高效液相色谱-四级杆-飞行时间质谱法测定荔枝果实中29种农药多残留[J]. 食品与发酵工业, 2024 , 50(14) : 270 -278 . DOI: 10.13995/j.cnki.11-1802/ts.038678

Abstract

An analytical method was established for the simultaneous determination of 29 pesticides in litchi by a high-performance liquid chromatography-tandem quadrupole-time of flight-mass spectrometry (HPLC-Q-TOF/MS) technique combined with an optimized QuEChERS procedure.The samples were extracted by acetonitrile and the acetonitrile supernatant was collected for purification after salting-out (magnesium sulfate anhydrous and sodium chloride) and centrifugation.Under the optimized chromatographic and mass spectrometric conditions, the data were collected by electrospray ionization (ESI) sources in positive and negative ion modes.The calibration curves of 29 pesticides showed good linearity in a concentration range of 0.001-0.2 mg/L (R2>0.99).The average recoveries were 70.2%-102.4% at three spiked levels (0.01, 0.1, 0.50 mg/kg), while the relative standard deviations (RSD) were 2.4%-6.2%.The limits of detection and limits of quantification ranged from 0.1 μg/kg to 3 μg/kg and 0.3 μg/kg to 10 μg/kg, respectively.This method was a simple and efficient method with high sensitivity and precision and had practical value for the rapid detection of residues of 29 pesticides in litchi.

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