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Citation: HAN Xiao-Qian, WEN Xiao-Guang, GUAN Yong-Hong, CHEN Li-Ren. Influences of Mobile Phase Composition and Temperature on Chiral Separation of Some Triazole Pesticides[J]. Chinese Journal of Applied Chemistry, ;2004, 21(2): 140-143. shu

Influences of Mobile Phase Composition and Temperature on Chiral Separation of Some Triazole Pesticides

1.
a The College of Chemical Engineering, Lanzhou Railway University, Lanzhou 730070;
2.
b Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou

Corresponding author: HAN Xiao-Qian,
Received Date: 22 May 2003
Available Online: 5 September 2003
Fund Project:

The chiral separation of the racemic triadimefon, penconazole, hexaconazole and diniconazole was carried out on HPLC column using cellulose (3,5-dimethylphenylcarbamate) as a chiral stationary phase. The influences of the mobile phase composition and temperature on chiral separation were investigated and the chromatographic conditions were optimized. The results showed that the structure and concentration of alcohol in mobile phase strikingly affect the enantiomeric separation and retention. The ln α-1/T plot for racemic triadimefon is linear at 15~40℃. The ln α-1/T plots for racemic hexaconazole and diniconazole are broken lines. At 15~25℃ the chiral separation is controlled by enthalpy and at 25~40℃, it is enthopy controlled.
- triazole pesticide,
- chiral separation,
- cellulose(dimethylphenylcarbamate),
- mobile phase composition,
- HPLC,
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