Enantioselective degradation of indoxacarb in cabbage and soil under field conditions

文献类型： 外文期刊

第一作者： Sun, Dali

作者： Sun, Dali;Wu, Yijun;Liang, Hongwu;Li, Li;Qiu, Jing;Sun, Dali;Liu, Chenglan

作者机构：

关键词： cabbage;degradation;enantioselective;indoxacarb;soil

期刊名称：CHIRALITY （ 影响因子：2.437； 五年影响因子：2.204 ）

ISSN：

年卷期：

页码：

收录情况： SCI

摘要： The enantioselective degradation of indoxacarb in cabbage and soil has been investigated in Beijing and Anhui under open conditions. Indoxacarb enantiomers in samples were extracted with acetonitrile, cleaned up by florisil SPE column, separated on high performance liquid chromatography with a cellulose-tris-(3, 5-dimethylphenylcarbamate)-based chiral stationary phase (CDMPC-CSP), and determined by a photodiode array detector. The validation of the developed method by fortification rac-indoxcarb in cabbage and soil showed good accuracy and precision. The results of field trials indicated that the dissipation of indoxacarb enantiomers followed pseudo-first-order kinetics or first-order kinetics in cabbage and soil at two locations. The half-lives of two enantiomers in cabbage ranged from 2.8 to 4.6d which were shorter than those in soil ranging from 23 to 35d. The changes of enantiomeric fraction values proved that enantioselective degradation of indoxacarb happened in cabbage and soil. The (-)-indoxacarb showed faster degradation in the Beijing cabbage, whereas in the Anhui cabbage, (+)-indoxacarb preferentially degraded. In soil, preferential degradation of (+)-indoxacarb was observed at two locations. Chirality 24:628-633, 2012.

分类号： O641

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