Enantioselective Degradation and Enantiomerization of Indoxacarb in Soil

文献类型： 外文期刊

第一作者： Sun, Dali

作者： Sun, Dali;Liu, Chenglan;Sun, Dali;Pang, Junxiao;Jiao, Bining;Qiu, Jing;Li, Li

作者机构：

关键词： enantioselective degradation;enantiomerization;enantiopure;indoxacarb

期刊名称：JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY （ 影响因子：5.279； 五年影响因子：5.269 ）

ISSN：

年卷期：

页码：

收录情况： SCI

摘要： In this study, the enantioselective degradation and enantiomerizaton of indoxacarb were investigated in two soils under nonsterilized and sterilized conditions using a chiral OD-RH column on a reversed-phase HPLC. Under nonsterilized conditions, the degradation of indoxacarb in two soils was enantioselective. In acidic soil, the half-lives of R-(—)- and S-(+)-indoxacarb were 10.43 and 14.00 days, respectively. Acidic soil was preferential to the degradation of R-(—)-indoxacarb. In alkaline soil, the half-lives of R-(—)- and S-(+)-indoxacarb were 12.14 and 4.88 days, respectively. S-(+)-Indoxacarb was preferentially degraded. Under sterilized conditions, approximately 5—10% of the initial concentration degraded after 75 days of incubation in acidic soil, whereas in alkaline soil, approximately half of the initial concentration degraded due to chemical hydrolysis under alkaline conditions. Enantiomerization was also discovered in acidic and alkaline soils. The results showed that mutual transformation existed between two enantiomers and that S-(+)-indoxacarb had a significantly higher inversion rate to R-(—)-indoxacarb than its antipode.

分类号： R15`S

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