茶叶中邻苯二甲酰亚胺残留气相色谱-串联质谱测定

doi:10.13305/j.cnki.jts.2018.04.010

Abstract

Abstract: As folpet residues, phthalimide (PI) and folpet were responsible for a high risk of false positive detection of folpet in tea, which became a major factor restricting the export of Chinese tea. A modified QuEChERS method for the determination of PI residue in tea using gas chromatography-tandem mass was developed and validated. The target analyte was extracted using acetonitrile and the crude extracts were purified using multiwalled carbon nanotubes, octadecyl silica and strong cation exchanger. At the spiked levels of 10, 20, 50 and 100βμg∙kg^-1, the average recoveries were from 73% to 104%, and the relative standard deviations were below 20%. The limit of quantification of PI in tea was 10.0βμg∙kg^-1. The method was simple, reliable, accurate, sensitive and appropriate for the determination of PI residue in tea.

Key words: tea, phthalimide, QuEChERS, gas chromatography-tandem mass

CLC Number:

TS272.5

GAO Guanwei, CHEN Hongping, CHAI Yunfeng, JIN Lili, LIU Xin, LU Chengyin. Determination of Phthalimide Residue in Tea Using Gas Chromatography-tandem Mass[J]. Journal of Tea Science, 2018, 38(4): 416-424.

References 14

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Determination of Phthalimide Residue in Tea Using Gas Chromatography-tandem Mass

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