Enantioselectivity and residue analysis of cycloxaprid and its metabolite in the pile and fermentation processing of Puer tea by ultraperformance liquid chromatography-high-resolution mass spectrometry
文献类型： 外文期刊
作者： Liu, Hongcheng 1 ; Tian, Hen 1 ; Jiang, MingMing 3 ; Lin, Tao 1 ; Li, Ji 1 ; Huang, Xiangzhong 2 ;
作者机构： 1.Yunnan Acad Agr Sci, Inst Qual Standard & Testing Technol, Supervis & Testing Ctr Farm Product Qual, Minist Agr, Kunming, Yunnan, Peoples R China
2.Yunnan Minzu Univ, Key Lab Chem Ethn Med Resources, Kunming, Yunnan, Peoples R China
3.Kunming Med Univ, Sch Pharmaceut Sci, Kunming, Yunnan, Peoples R China
4.Kunming Med Univ, Yunnan Key Lab Pharmacol Nat Prod, Kunming, Yunnan, Peoples R China
关键词： cycloxaprid; enantioselectivity; metaboliteLC-HFMS; puer tea processing
期刊名称：FOOD SCIENCE & NUTRITION （ 2021影响因子：3.553； 五年影响因子：3.634 ）
ISSN： 2048-7177
收录情况： SCI
摘要： The residues of cycloxaprid enantiomers and metabolites are investigated by ultraperformance liquid chromatography-high-resolution mass spectrometry (UPLC-HRMS) during raw and ripen Puer tea processing. A Chiralpak AG column with chiral stationary phase of amylose tris (3-chloro-5-methylphenylcarbamate) is succeed to separate the 1R, 2S-cycloxaprid, 1S, 2R-cycloxaprid, and their metabolite, which is identified as nitrylene-imidazolidine. It is not conversed 1R, 2S -cycloxaprid into 1S,2R-cycloxaprid during Puer tea processing. The estimated half-lives of the 1R,2S-cycloxaprid and 1S,2R-cycloxaprid are 0.97 and 1.1 h, respectively, and 1R,2S-cycloxaprid decreases more quickly than the 1S,2R-cycloxaprid. During raw Puer tea processing, the half-lives of IR, 2S-cycloxaprid and 15, 2R-cycloxaprid are 1.68 h and 1.77 h, but the residue is still detected even if it is over 730 day. However, the half-lives of 1R,2S-cycloxaprid and 1.5,2R-cycloxaprid are 0.60 day and 0.63 day during ripen tea processing. The amounts of metabolite are more in raw tea than in ripen tea; the terminal residues are still detected until 730 days during raw tea. A significant enantioselectivity of 1R, 2S-cycloxaprid and 1S, 2R-cycloxaprid is observed during raw tea or ripen tea processing. The degration result shows the enantioselectivity of cycloxaprid in raw or ripen Puer tea processing.
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