NDLI: Enantioselective Degradation and Chiral Stability of Profenophos in Soils

Content Provider	IEEE Xplore Digital Library
Author	Zhaoyang Li Ye Zhang Xiangnan Luo Fengning Cheng Jie Guo Weixiao Wang
Copyright Year	2010
Abstract	Profenophos, which has one chiral center and exists as two enantiomers, is a widely used organophosphorus insecticide. In this paper, the degradation of (±±)-profenophos and (+)-profenophos in five soils was investigated using enantioselective high-performance liquid chromatography (HPLC). Our results showed that profenophos was degraded fast in soils with half-lives ranging from 4.2 h to 495.1 h. Further chiral analysis demonstrated the occurrence of enantioselectivity during the degradation of (±±)-profenophos. Also, it was observed obviously that different enantioselectivities were showed in different soils. In Tianjin and Hubei alkaline soils, the (+)-enantiomer was degraded faster than the (-)-enantiomer. However, in Baoding alkaline soil both enantiomers were degraded at similar rates, and in Hubei and Guangdong acidic soils the enantioselectivity was reversed. In order to evaluate the effects of soil pH on the enantioselective degradation of profenophos, a Tianjin alkaline soil was acidified to pH 5.53 and the degradation of profenophos in this soil resulted in slower degradation rate and similar enantioselectivity. At last, during the degradation of enantiomer pure (+)-profenophos, no enantiomerization was observed in both nonsterilized and sterilized soils.
Starting Page	1
Ending Page	4
File Size	300322
Page Count	4
File Format	PDF
ISBN	9781424447121
ISSN	21517622
DOI	10.1109/ICBBE.2010.5518046
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-06-18
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Degradation Stability Chemical analysis Potential well Humans Soil Educational institutions Biochemistry Chemical technology Contamination
Content Type	Text
Resource Type	Article

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