Premium
Chiral Separation and Enantioselective Degradation of Vinclozolin in Soils
Author(s) -
Liu Hui,
Liu Donghui,
Shen Zhigang,
Sun Mingjing,
Zhou Zhiqiang,
Wang Peng
Publication year - 2014
Publication title -
chirality
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.43
H-Index - 77
eISSN - 1520-636X
pISSN - 0899-0042
DOI - 10.1002/chir.22284
Subject(s) - chemistry , vinclozolin , enantiomer , enantioselective synthesis , chromatography , soil water , chirality (physics) , elution , high performance liquid chromatography , degradation (telecommunications) , environmental chemistry , organic chemistry , fungicide , botany , catalysis , telecommunications , environmental science , computer science , soil science , biology , chiral symmetry breaking , physics , quantum mechanics , nambu–jona lasinio model , quark
Vinclozolin is a chiral fungicide with potential environmental problems. The chiral separation of the enantiomers and enantioselective degradation in soil were investigated in this work. The enantiomers were separated by high‐performance liquid chromatography (HPLC) on Chiralpak IA, IB, and AZ‐H chiral columns under normal phase and the influence of the mobile phase composition on the separation was also studied. Complete resolutions were obtained on all three chiral columns under optimized conditions with the same elution order of (+)/(−). The residual analysis of the enantiomers in soil was conducted using accelerate solvent extraction followed by HPLC determination. The recoveries of the enantiomers ranged from 85.7–105.7% with relative standard deviation (SD) of 0.12–3.83%, and the limit of detection (LOD) of the method was 0.013 µg/g. The results showed that the degradations of vinclozolin enantiomers in the soils followed first‐order kinetics. Preferential degradation of the (−)‐enantiomer was observed only in one soil with the largest |ES| value of 0.047, and no obvious enantioselective degradation was observed in other soils. It was found that the persistence of vinclozolin in soil was related to pH values based on the half‐lives. The two enantiomers disappeared about 8 times faster in basic soils than that in neutral or acidic soils. Chirality 26:155–159, 2014 . © 2014 Wiley Periodicals, Inc.