Magnetic graphene oxide nanocomposite materials for magnetic dispersive solid-phase extraction and determination of pyrrolizidine alkaloids in tea beverages.
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2025
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Abstract
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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| Reference Key |
li2025magnetic
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|---|---|
| Authors | Li, Shiqi; Lu, Yuting; Ma, Guicen; Huang, Xuchen; Yi, Yuexing; Chen, Hongping; Li, Zuguang |
| Journal | Food chemistry |
| Year | 2025 |
| DOI |
10.1016/j.foodchem.2025.144636
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