Abstract
A micellar electrokinetic capillary chromatographic method for the separation of anthraquinone positional isomers was established. The running electrolytes used in this method were 0.03 M sodium dodecyl sulphate (SDS) in 0.03 M borate buffer (pH 9) containing 10% acetonitrile for dihydroxy- and dihydroxy-methoxy-methylanthraquinones, 0.08 M SDS in 0.03 M borate buffer (pH 9) containing 10% acetonitrile for dimethoxyanthraquinones, and 0.03 M SDS in 0.08 M borate buffer (pH 8) containing 10% acetonitrile for hydroxy-methoxy- and dihydroxy-methylanthraquinones, each with an applied voltage of 20 kV. This method is simple, rapid and reproducible. © 1997 John Wiley & Sons, Ltd.
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