数字农科院2.0

Magnetic graphene oxide nanocomposite materials for magnetic dispersive solid-phase extraction and determination of pyrrolizidine alkaloids in tea beverages

文献类型： 外文期刊

作者： Shiqi Li;Yuting Lu;Guicen Ma;Xuchen Huang;Yuexing Yi;Hongping Chen;Zuguang Li

作者机构：

关键词： Adsorption efficiency;Camellia sinensis;Magnetic dispersive solid-phase extraction;Magnetic graphene oxide;Pyrrolizidine alkaloids;Tea beverages

期刊名称： Food Chemistry

ISSN： 0308-8146

年卷期： 2025 年 486 卷

页码：

收录情况： SCIE（2025版） ; ; EI（2025版）

摘要： Pyrrolizidine alkaloids (PAs) and their N-oxides (PANOs) are plant-derived toxins, and tea beverages represent one of the most important exposure pathways of PAs/PANOs for human being. Therefore, establishing a method for the sensitive determination of PAs/PANOs is of great significance. In this study, magnetic graphene oxide (MGO) nanocomposite materials were used as an adsorbent in magnetic dispersive solid-phase extraction (d-MSPE) for quantifying PAs/PANOs in tea beverages. MGO exhibited high adsorption efficiency of PAs/PANOs from 83 % to 99 %, with rapid adsorption occurring within 20 min and desorption taking only 6 min. Under optimized conditions, the method showed excellent linearity (1–500 μg/L), low detection limits (0.01–0.6 μg/L), and good precision (RSD < 9.4 %). These results demonstrate the d-MSPE is a simple, efficient, and rapid method for the sample pretreatment and determination of PAs/PANOs in tea beverages.

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