数字农科院2.0

An Enhanced Sensitivity And Cleanup S.trategy For The Nontargeted S creening And Targeted Determination Of Pesticides In Tea Using Modified Dispersive Solid-Phase Extraction And Cold-Induced Acetonitrile Aqueous Two-Phase Systems Coupled

文献类型： 外文期刊

作者： Wang, FQ; Li, SH; Feng, H; Yang, YJ; Xiao, B; Chen, DW

作者机构：

关键词： Pesticides; Tea; Matrix effect; Dispersive solid-phase extraction; Aqueous two-phase systems; High resolution mass spectrometry

期刊名称： FOOD CHEMISTRY

ISSN： 0308-8146

年卷期： 2019 年 275 卷

页码：

收录情况： JCR（2021版） ; EI（2021版）

摘要： At present, matrix interferences in tea are still a great challenge for analysis of multi-pesticide residues. Herein, a simple sample preparation method was developed based on the modified dispersive solid-phase extraction (DSPE) procedure and cold-induced acetonitrile aqueous two-phase systems (ATPS). In modified DSPE procedure, polyvinylpolypyrrolidone (PVPP) was selected as the matrix dispersive adsorbent to remove polyphenols from the tea with the removal rate of > 98.3%. Using cold-induced acetonitrile ATPS, caffeine of the tea extract was sharply reduced by 81.2%, and a 0.798-3.167 of enrichment factor for the representative pesticides was achieved. In liquid chromatography-high resolution mass spectrometry analysis, a full scan/data independent acquisition approach was used for the nontargeted screening and targeted determination of pesticides. In data analysis, an in-house database of pesticides was constructed, and a simple accurate mass calibration method was used to correct the accurate mass variation, which was conducive to reduce the number of false detects.

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