Simultaneous determination of pyrethrins residues in teas by ultra-performance liquid chromatography/tandem mass spectrometry

文献类型： 外文期刊

第一作者： Liu, Xingang

作者： Liu, Xingang;Dong, Fengshou;Xu, Jun;Zhang, Changpeng;Li, Yuanbo;Zheng, Yongquan;Song, Wencheng

作者机构：

关键词： Tea;Pyrethrins;Ultra-performance liquid chromatography;coupled with tandem mass spectrometry;Multi-residue;Solid-phase extraction

期刊名称：ANALYTICA CHIMICA ACTA （ 影响因子：6.558； 五年影响因子：6.228 ）

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年卷期：

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收录情况： SCI

摘要： A sensitive and effective method for the simultaneous quantitative determination of pyrethrin residues in teas was developed and validated using ultra-performance liquid chromatography coupled with tandem mass spectrometry (UPLC-MS/MS). The six major constituents of the pyrethrins (pyrethrin I and II, jasmolin I and II, and cinerin I and II) were successfully separated and independently confirmed in a single run within approximately 5 min. The multi-residue analysis of pyrethrins in teas involved simply extraction with acetoftitrile, clean-up using a multilayer solid phase extraction cartridge, and subsequent separation by a hydrophilic end-capped Aquasil C18 columns with detection by tandem mass spectrometry using an electrospray ionization source in positive mode (ESI+). Recovery studies were carried out at three spiked levels (0.05,0.1,0.5 mgk g~(-1)). The overall average recoveries using this method in green teas and black teas at the three concentration levels ranged from 76.15% to 101.86% with relative standard deviations (RSDs) in the range of 2.71 -12.93% (n = 5) for all analytes. The limits of detections (LODs) were below 0.009mgkg~(-1), which were lower than the maximum residue limits (MRLs) of 0.5 mgkg~(-1) in tea samples established by the European Union legislations in 2008, while the limits of quantification (LOQ) did not exceed 0.03 mg kg~(-1). This study provides a theoretical basis for China to draw up MRLs for pyrethrins in teas.

分类号： O65

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