Citation:
HUANG Bao-Mei, YAO Cheng-Wei, LI Song, MO Jin-Yuan. Separation of Metalaxyl Enantiomers by Capillary Electrophoresis with Conductive Detection[J]. Chinese Journal of Applied Chemistry,
;2007, 24(11): 1343-1345.
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A separation method for Metalaxyl enantiomers by capillary electrophoresis with conductive detection was developed. The effect of running buffer, pH, the concentration of the chiral selector β-CD, separation voltage and injection time were discussed in detail. Under the following separation conditions: uncoated fused silica capillary(45 cm×75 μm) as separation channel, 5 mmol/L Na2B4O7.H2O-2 mmol/L H3BO3-4 mmol/L β-CD(pH=9.0) as running buffer, and 15 kV separation voltage, linear correlation was found between the peak height(y) and the mass concentration of R-Metalaxyl(x) in the range of 5.0~120.0 mg/L, with the regression equation y=6.1+24.3xA, and the correlation coefficient was 0.998 2, and the determination limit was 1.5 mg/L; linear correlation was found between the peak height and the mass concentration of S-Metalaxyl(x) in the range of 10.0~150.0 mg/L, with the regression equation y=4.1+18.9x, and the correlation coefficient was 0.998 6, and the determination limit was 5.0 mg/L.
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