Determination of Three Typical Metabolites of Pyrethroid Pesticides in Tea Using a Modified QuEChERS Sample Preparation by Ultra-High Performance Liquid Chromatography Tandem Mass Spectrometry

文献类型： 外文期刊

第一作者： Chen, Hongping

作者： Chen, Hongping;Wang, Xinlu;Liu, Pingxiang;Jia, Qi;Qiu, Jing;Chen, Hongping;Wang, Xinlu;Liu, Pingxiang;Han, Haolei;Jiang, Changling;Qiu, Jing;Chen, Hongping;Han, Haolei;Jiang, Changling

作者机构：

关键词： tea; pyrethroid pesticide metabolite; ultra-high performance liquid chromatography tandem mass spectrometry; modified QuEChERS

期刊名称：FOODS （ 影响因子：4.35； 五年影响因子：4.957 ）

ISSN：

年卷期： 2021 年 10 卷 1 期

页码：

收录情况： SCI

摘要： Pyrethroid pesticides are widely used on tea plants, and their residues of high frequency and concentration have received great attention. Until recently, the residues of typical metabolites of pyrethroid pesticides in tea were unknown. Herein, a modified "quick, easy, cheap, effective, rugged and safe" (QuEChERS) method for the determination of three typical metabolites of pyrethroid pesticides in tea, using ultra performance liquid chromatography tandem mass spectrometry, was developed. The mixture of florisil, octadecylsilane, and graphite carbon black was employed as modified QuEChERS adsorbents. A Kinetex C18 column achieved good separation and chromatographic peaks of all analytes. The calibration curves of 3-phenoxybenzoic acid (3-PBA) and 4-fluoro-3-phenoxybenzoic acid (4-F-3-PBA) were linear in the range of 0.1-50 ng mL(-1) (determination coefficient R-2 higher than 0.999), and that of cis-3-(2-chloro-3,3,3-trifluoroprop-1-en-1-yl)-2,2-dimethylcyclopropanecarboxylic acid (TFA) was in the range of 1-100 ng mL(-1) (R-2 higher than 0.998). The method was validated and recoveries ranged from 83.0% to 117.3%. Intra- and inter-day precisions were lower than or equal to 13.2%. The limits of quantification of 3-PBA, 4-F-3-PBA, and TFA were 5, 2, and 10 mu g kg(-1), respectively. A total of 22 tea samples were monitored using this method, and 3-PBA and TFA were found in two green tea samples.

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序