数字农科院2.0

Residue analysis and risk assessment of cyflumetofen and its three metabolites from fresh tea leaf to tea infusion through purification with new nano adsorbents and determination by ultra-performance liquid chromatography-tandem mass spectrometry

文献类型： 外文期刊

作者： Yating Ning;Yue Hu;Fengjian Luo;Xiangyun Wang;Li Zhou;Bingjun Han;Liezhong Chen;Xinzhong Zhang

作者机构：

关键词： Cyflumetofen;Metabolite;multi-walled carbon nanotubes (MWCNT);Residue analysis;Tea

期刊名称： Microchemical Journal

ISSN： 0026-265X

年卷期： 2025 年 208 卷

页码：

收录情况： SCIE（2025版）

摘要： Cyflumetofen is a potential new type acaricide for tea gardens. A simultaneous residue analysis method for cyflumetofen and its three metabolites (B-1, B-3, and AB-1) in fresh tea leaves, green tea, black tea, green tea infusion and black tea infusion was developed. Samples were extracted with acetonitrile containing 1 % of formic acid, followed by purification using multi-walled carbon nanotubes (MWCNT) and nano-ZrO2 absorbents in conjunction with low-temperature clean (LTC). The samples were then analyzed by ultra-performance liquid chromatography tandem mass spectrometry (UPLC-MS/MS). The calibration curves for cyflumetofen and its metabolites, ranging from 0.005 to 2.0 mg/L (excluding B-1, which is from 0.01 to 2.0 mg/L), demonstrated satisfactory correlation coefficients (R2) of at least 0.9931 across various tea matrix-matched conditions. The average recoveries for cyflumetofen and its three metabolites in different tea matrixes ranged from 71.9 % to 116.9 %, with relative standard deviations (RSDs) below 15.1 %. The limits of quantification (LOQs) were set at 0.005 mg/kg for fresh tea leaves, black tea, and green tea, and 0.5 µg/L for black and green tea infusion. For B-1, the LOQs were set at 0.01 mg/kg for black and green tea, and 1.0 µg/L for black and green tea infusion. After applying a 20 % cyflumetofen suspension concentrate to a tea plant field, real fresh tea leaf samples were found to contain cyflumetofen and its three metabolites B-1, B-3, and AB-1. The half-life (t1/2) of cyflumetofen in fresh tea leaves was found to be 1.18 days. During the tea processing, various processing steps had distinct impacts on compound residues, especially under high-temperature conditions. The total processing factors (TPFs) for cyflumetofen in green tea and black tea ranged from 0.75 to 1.16 and 1.31 to 2.78, respectively. The leaching rates (LRs) of cyflumetofen from tea to tea infusion were 2.6 % for green tea and 2.4 % for black tea. Based on risk assessment, the total dietary risk quotients for both cyflumetofen and B-1 were significantly below 100 %. This provides valuable guidance for the rational application of cyflumetofen in tea plantations.

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