期刊
BIOMEDICAL CHROMATOGRAPHY
卷 28, 期 10, 页码 1371-1377出版社
WILEY
DOI: 10.1002/bmc.3178
关键词
indoxacarb enantiomers; semipreparative enantioseparation; Chiralpak IA column; enantioselective degradation; water
类别
资金
- National Natural Science Foundation of China [21367007]
- Special Fund for Agro-scientific Research in the Public Interest [201203022]
Direct semipreparative enantioseparation of indoxacarb was performed on a semipreparative Chiralpak IA column using normal-phase high-performance liquid chromatography (HPLC) with n-hexane-isopropanol-ethyl acetate (70:20:10) mixture as mobile phase. Degradation of indoxacarb (2.33S+1R) and its two enantiopure isoforms in three aqueous buffer solutions and four water samples collected from natural water sources was then elucidated by HPLC analysis on Chiralpak IA column. Degradation of all three indoxacarbs complied with first-order kinetics and demonstrated linearity with regression coefficients R-2>0.88. Indoxacarb (2.33S+1R) underwent enantioselective degradation in river water, rain water, and buffer solution of pH7.0. Enantiopure S-(+)-indoxacarb and R-(-)-indoxacarb were both found to be configurationally stable in water. Copyright (c) 2014 John Wiley & Sons, Ltd.
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