Simultaneous determination of 15 pyrrolizidine alkaloids and their N-oxides in weeds, soil, fresh tea leaves, and tea: Exploring the pollution source of pyrrolizidine alkaloids in tea

文献类型： 外文期刊

第一作者： Jiao, Weiting

作者： Jiao, Weiting;Zhu, Lei;Wang, Luyao;Wu, Xiangwei;Hua, Rimao;Jiao, Weiting;Shen, Tingting;Zhu, Lei;Wang, Chen;Chen, Hongping;Li, Qing X.

作者机构：

关键词： Pyrrolizidine; Alkaloid; Tea; UPLC-MS/MS; Tea garden

期刊名称：FOOD CHEMISTRY （ 影响因子：8.5； 五年影响因子：8.2 ）

ISSN： 0308-8146

年卷期： 2024 年 434 卷

页码：

收录情况： SCI

摘要： Pyrrolizidine alkaloids (PAs) and their N-oxides (PANOs) are novel contaminants in tea. However, the source of PA/PANO contamination in tea remains unclear. In this study, 15 PAs/PANOs were extracted from plant samples (tea, fresh tea leaves, and weeds) with 0.1 M sulfuric acid and from soil with 0.1 M sulfuric acid methanol after adjusting soil acidity with 0.1 M trisodium citrate. Satisfactory recoveries of PAs/PANOs from four different matrices at 0.02, 0.1, and 0.5 mg kg- 1 was 72%-114% with relative standard deviations (RSD) of 0.03%-16%. Seven out of 15 PAs/PANOs were detected in tea purchased from the local market ranging from undetected to 96.2 mu g kg- 1 . Thirteen, three, and four PAs/PANOs were detected in weeds, fresh tea leaves, and soil, respectively. Based on the types of PAs/PANOs detected in the three matrices, it was preliminarily speculated that PAs/ PANOs in tea originated from weeds in the tea garden.

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