Simultaneous Quantitative Determination of Residues of Pyriproxyfen and Its Metabolites in Tea and Tea Infusion Using Ultra-Performance Liquid Chromatography-Tandem Mass Spectrometry

文献类型： 外文期刊

第一作者： Li, Hongxia

作者： Li, Hongxia;Zhong, Qing;Wang, Xinru;Luo, Fengjian;Zhou, Li;Chen, Zongmao;Zhang, Xinzhong;Li, Hongxia;Zhong, Qing

作者机构：

关键词： tea; pyriproxyfen; metabolite; residue analysis; UPLC-MS/MS

期刊名称：AGRONOMY-BASEL （ 影响因子：3.949； 五年影响因子：4.117 ）

ISSN：

年卷期： 2022 年 12 卷 8 期

页码：

收录情况： SCI

摘要： A reliable, simultaneous residue-analysis method for pyriproxyfen and its five metabolites in fresh tea leaves, green tea, black tea, green-tea infusion and black-tea infusion was developed and validated. The samples were extracted with acetonitrile, purified using a modified QuEChERs (quick, easy, cheap, effective, rugged and safe) method and determined using ultra-performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS). The method was successfully calibrated in the range of 0.005-2.50 mg/L with correlation coefficients (r) equal to or above 0.9957. The limits of detection (LODs) were less than 0.002 mg/L. The average spiked recoveries of pyriproxyfen and its metabolites at four levels were 71.2 similar to 102.9% with relative standard deviations (RSDs) of 0.3 similar to 14.4%. The limits of quantification (LOQs) in fresh tea leaves, tea and tea infusion were 0.002 mg/kg, 0.005 mg/kg and 0.0002 mg/L, respectively. This proposed method was feasible and was applied to analyze the residues of pyriproxyfen and its five metabolites on real fresh tea leaf samples. The results indicated that the half-life (t(1/2)) of pyriproxyfen on fresh tea leaves was 2.48 d, and the five metabolites were detected on fresh tea leaves during field growth after application.

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