Determination of strychnine and brucine in traditional Chinese medicine preparations by capillary zone electrophoresis with micelle to solvent stacking

A novel micelle to solvent stacking on-line sample preconcentration technique in capillary zone electrophoresis(MSS-CZE) has been developed to determine the strychnine and brucine in traditional Chinese medicine preparations.The optimal running buffer was 30 mmol/L H_3PO_4 containing 20%acetonitrile at pH 4.0.The sample matrix was 8 mmol/L H_3PO_4 containing 5 mmol/L sodium dodecyl sulfate(SDS) at pH 3.0.The established MSS-CZE method afforded more than 50-fold improvements in concentration sensitivity comp...