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Simultaneous Determination of Plant Growth Regulators and Imidacloprid, Acetamiprid in Tea by Ultra Performance Liquid Chromatography-Tandem Mass Spectrometry

文献类型： 外文期刊

作者： Zhu Li 1 ; Wang Chen 1 ; Chen Hong-Ping 1 ; Zhang Ying-Bin 1 ; Zhou Su-Juan 1 ; Wang Guo-Qing 1 ; Liu Xin 1 ;

作者机构： 1.Chinese Acad Agr Sci, Lab Qual & Safety Risk Assessment Tea, Minist Agr, Tea Res Inst, Hangzhou 310008, Zhejiang, Peoples R China

关键词： Tea;Plant growth regulator;Imidacloprid;Acetamiprid;Ultra performance liquid chromatography-tandem mass spectrometry;Dispersive solid phase extraction

期刊名称：CHINESE JOURNAL OF ANALYTICAL CHEMISTRY （ 影响因子：1.134； 五年影响因子：0.909 ）

ISSN： 0253-3820

年卷期： 2017 年 45 卷 4 期

页码：

收录情况： SCI

摘要： An efficient method for the analysis of multiclass plant growth regulators and pesticide (imidacloprid, acetamiprid) residues in tea was developed based on ultra-performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS). The samples were extracted with acetonitrile/formic acid (99: 1, V/V) solution, cleaned up with four sorbents including C-18, strong anion exchanger (SAX), primary secondary amine (PSA) and anhydrous MgSO4. The compounds were separated on a HSS T3 column under positive/negative electrospray ionization mode, detected by scheduled multiple reaction monitoring (SMRM), and quantified by matrix-matched external standard curves. All pesticide residues showed good linearity in the concentration range of 1 - 200 mu g/L (6-benzylaminopurine, paclobutrazol, uniconazole, forchlorfenuron, mepiquat chloride, imidacloprid, acetamiprid) or 5 - 1000 mu g/L (2,4-dichlor-ophenoxyacetic acid, 4-chlorophenoxyacetic acid, indole-3-acetic acid, gibberellic acid, 1-naphthaleneacetic acid, indole-3-butyric acid), with correlation coefficient (R-2 >= 0. 99). Limits of detection (LOD, S/N = 3) and limits of quantitation (LOQ, S/N = 10) were 0. 18-9. 68 mu g/kg and 0. 61-32. 26 mu g/kg, respectively. In addition, the spiked recoveries of tea samples were 73. 1% - 108. 9%, and RSDs were 0. 6% - 8. 0%. This method was applied to commercial samples, and all the detections were confirmed by acquiring transitions for each pesticide in the samples.

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