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当前位置: 首页 > 文章 > 茶叶中12种农药残留量的QuEChERS-液相色谱-串联质谱法测定 农药 2020 (6) 430-436
Position: Home > Articles > Determination of 12 Pesticide Residues in Tea by QuEChERS Coupled to Liquid Chromatography-Tandem Mass Spectrometry Agrochemicals 2020 (6) 430-436

茶叶中12种农药残留量的QuEChERS-液相色谱-串联质谱法测定

作  者：
武源;覃慧丽
单  位：
关键词：
QuEChERS;液相色谱-串联质谱(LC-MS/MS);茶叶;内标法;农药多残留
摘  要：
[目的]建立测定茶叶中12种农药残留量的液相色谱-串联质谱(LC-MS/MS)检测方法。[方法]茶叶样品经乙腈提取后,采用QuEChERS方法前处理,净化液经液相色谱-串联质谱测定,基质内标法定量。[结果]在0.001～0.1 mg/L范围内,12种农药的线性关系良好,相关系数r~2大于0.997,方法检出限为0.0003～0.01 mg/kg,定量限为0.001～0.04 mg/kg。阴性茶叶样品在低、中、高3个添加水平下的平均回收率为80.6%～106.6%,相对标准偏差为0.4%～8.2%。[结论]与传统的QuEChERS相比,该方法具有操作简单、快速、试剂用量少、回收率高、准确性强等特点,适合于茶叶中12种农药残留量的测定。
译  名：
Determination of 12 Pesticide Residues in Tea by QuEChERS Coupled to Liquid Chromatography-Tandem Mass Spectrometry
作  者：
WU Yuan;QIN Hui-li;Liuzhou Institute for Food and Drug Control;
关键词：
QuEChERS;;liquid chromatography-tandem mass spectrometry(LC-MS/MS);;tea;;internal standard method;;pesticide residues
摘  要：
[Aims] This study aims to develop a method for the determination of 12 pesticide residues in tea by Liquid Chromatography-Tandem Mass Spectrometry(LC-MS/MS). [Methods] The target pesticides in tea were extracted by a modified QuEChERS method with acetonitrile as the solvent. The quantification was performed by the matrix internal standard method. [Results] Good linearity was observed for all calibration curves with correlation coefficients(r~2) >0.997 in the range of 0.001-0.1 mg/L. The limits of detections(LODs) were 0.0003-0.01 mg/kg, and the limits of quantitation(LOQs)were 0.001-0.04 mg/kg. The recoveries at three spiked levels varied from 80.6 to 106.6%, with relative standard deviations(RSDs) of 0.4-8.2%. [Conclusions] Compared with the traditional QuEChERS method, this method is easy, fast and solvent saving with good recovery and accuracy. Thus, it is suitable for the determination of 12 pesticide residues in tea.

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