Published:Journal of Chromatographic Science,
ISSN 0021-9665 Volume 44,
Number 10, November/December 2006, pp.602-606
Chiral Separations of Pesticide Enantiomers by
High-Performance Liquid Chromatography Using Cellulose Triphenylcarbamate
Chiral Stationary Phase
Peng Wang[1], Shuren Jiang[1], Donghui Liu[1],
Weili Shan[2], Hongjun Zhang[2], and Zhiqiang Zhou[1],
[1]Department of Applied Chemistry, China Agricultural University,
Beijing 100094 and
[2]Institute for control of Agrichemicals Ministry of Agriculture,
Beijing 100026, China
The direct chiral separations of pesticide enantiomers
by high-performance liquid chromatography by applying self-prepared
cellulose triphenylcarbamate chiral stationary phase are performed.
The mobile phase is n-hexane modified by isopropanol as a polar
modifier. Nine chiral pesticides (benalaxyl, vinclozolin, diclofop-methyl,
tebuconazole, quizalofop-ethyl, hexaconazole, lactofen, isocarbophos,
and paclobutrazol) show enantioselectivity on the chiral stationary
phase. An online circular dichrorism detector is used for identifying
the pesticide enantiomers. The influences of the volume content
of isopropanol and column temperature on the separations are investigated.
The thermodynamic parameters related to the chiral distinguish
mechanisms are also calculated.
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