食品科学

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基质固相分散萃取-气相色谱-串联质谱法同时测定蔬菜中195 种农药残留

李 蓉1,卢俊文1,杨 芳1,张朋杰1,李拥军2,谢建军3,储大可4   

  1. 1.中山出入境检验检疫局,广东 中山 528403;2.中山市农产品质量监督检验所,广东 中山 528400;
    3.广东出入境检验检疫局,广东 广州 510623;4.广东药学院,广东 中山 528400
  • 出版日期:2014-12-25 发布日期:2014-12-29
  • 基金资助:

    中山市科技计划—农业科技攻关计划项目(20103A190);中山市科技发展专项(2013A3FC0251)

Simultaneous Determination of 195 Pesticide Residues in Vegetables Using Solid Phase Dispersive xtraction-Gas Chromatography-Tandem Mass Spectrometry

LI Rong1, LU Jun-wen1, YANG Fang1, ZHANG Peng-jie1, LI Yong-jun2, XIE Jian-jun3, CHU Da-ke4   

  1. 1. Zhongshan Entry-Exit Inspection and Quarantine Bureau, Zhongshan 528403, China;
    2. Zhongshan Quality Supervision and Inspection Institute of Agricultural Products, Zhongshan 528400, China;
    3. Guangdong Entry-Exit Inspection and Quarantine Bureau, Guangzhou 510623, China;
    4. Guangdong Pharmaceutical University, Zhongshan 528400, China
  • Online:2014-12-25 Published:2014-12-29

摘要:

目的:建立一种蔬菜中195 种农药的气相色谱-质谱检测方法。方法:样品用乙酸乙酯匀浆提取后,经基质固相分散萃取法净化,气相色谱-质谱仪的选择反应监测模式-进行测定,内标法定量。结果:在0.01~1.00 mg/L质量浓度范围内,所有农药的线性相关系数均大于0.99,方法的定量限范围为1.9~25.5 μg/kg。分别在菜心、生菜、黄瓜、芹菜、土豆等蔬菜中进行3 个添加水平(10、20、100 μg/kg)实验,平均回收率为37.6%~136.7%,相对标准偏差为0.2%~15.3%。结论:该方法快速、灵敏、准确、高通量,具有良好的回收率和稳定性,较好地解决了样品本底成分复杂带来的基质干扰,适用于蔬菜中195 种农药残留量的快速测定。

关键词: 基质固相分散萃取, 气相色谱-质谱, 农药残留, 蔬菜

Abstract:

Objective: To develop a method for the determination of 195 pesticide residues in vegetables using gas
chromatography with tandem mass spectrometry (GC-MS-MS) under a selected reaction monitoring (SRM) mode. Methods:
The target compounds were extracted from samples with ethyl acetate and the extract was cleaned up by off-line solid phase
dispersive extraction technique. The analytes were quantified by an internal standard method. Results: In the linear range
(0.01–1.00 mg/L), the correlation coefficient for each pesticide was higher than 0.99. The average recoveries at three spiked
levels (10, 20 and 100 μg/kg) varied from 37.6% to 136.7% with relative standard deviations (RSDs) between 0.2% and 15.3%.
The limits of quantification (LOQ) (signal/noise ratio = 10) were 1.9–25.5 μg/kg. Conclusion: The method is rapid, sensitive,
accurate and high throughput, without matrix interference and suitable for the analysis of 195 pesticide residues in vegetables.

Key words: solid phase dispersive extraction, gas chromatography-tandem mass spectrometry (GC-MS-MS), pesticide residues, vegetable

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