Enantioselective Degradation of Indoxacarb From Different Commercial Formulations Applied to Tea
Enantioselective Degradation of Indoxacarb From Different Commercial Formulations Applied to Tea
复制标题
茶中不同商业配方中茚虫威的对映选择性降解
作者：
Zhang Yuping;Hu Deyu;Meng Xingang;Shi Qingcai;Li Pei;Jin Linhong;Zhang Kankan;Song Baoan
研究了富集（+）‐S‐茚虫威（S/R:70/30）的茚虫威在三种典型绿茶中的立体选择性降解。建立了一种简便、精确的测定绿茶中茚虫威对映体的手性方法。该方法基于高效液相色谱-串联质谱联用，使用Chiralpak IC色谱柱。茚虫威对映体的立体选择性降解表明，在所有三个典型茶园中，（+）‐S‐对映体比（−）‐R‐对映体消散得更快。然而，施用纯（+）‐S‐吲哚卡威后未观察到对映异构体化。悬浮液（SC）中活性成分（+）‐S‐茚虫威在茶树上的残留比乳化液（EC）中更持久。手性，2015。©2015 Wiley期刊公司
The stereoselective degradation of indoxacarb enriched with (+)‐S‐indoxacarb (S/R:70/30) was investigated in three typical green teas. A convenient and precise chiral method was developed and validated for measuring indoxacarb enantiomers in green tea. The developed method was based on high‐performance liquid chromatography coupled with tandem mass spectrometry using a Chiralpak IC column. The stereoselective degradation of indoxacarb enantiomers showed that the (+)‐S‐enantiomer dissipated faster than the (−)‐R‐enantiomer in all three typical tea farms. However, no enantiomerization was observed after applying pure (+)‐S‐indoxacarb. Residues on tea plant of the active ingredient (+)‐S‐indoxacarb from suspension concentrate (SC) was more persistent than that from emulsifiable concentrate (EC).Chirality 27:262–267, 2015. © 2015 Wiley Periodicals, Inc.