Enantioselective degradation of indoxacarb in cabbage and soil under field conditions

Chirality
Dali SunLi Li

Abstract

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 4.6 d which were shorter than those in soil ranging from 23 to 35 d. 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.

References

Sep 5, 2002·Journal of Agricultural and Food Chemistry·C ZadraA Zazzerini
Mar 26, 2004·Ecotoxicology and Environmental Safety·Yei-Shung WangJui-Hung Yen
Jan 6, 2005·Proceedings of the National Academy of Sciences of the United States of America·Weiping LiuWilliam A Jury
Apr 10, 2010·Environmental Pollution·Jing YeWeiping Liu
Sep 15, 2008·Food Chemistry·Donghui LiuZhiqiang Zhou

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Citations

Oct 29, 2013·Journal of Agricultural and Food Chemistry·Dali SunBining Jiao
Nov 19, 2020·Journal of Analytical Methods in Chemistry·Ying-Hong LiHu Zhang
Nov 26, 2020·Environmental Toxicology and Chemistry·Yanhong LiLihong Qiu

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