Simultaneous separation and analysis of camptothecin alkaloids in real samples by large-volume sample stacking in capillary electrophoresis

Large-volume sample stacking (LVSS) is commonly used as an effective online preconcentration method in capillary zone electrophoresis (CZE). In this paper, the method LVSS combined with CZE has been proposed to analyze camptothecin alkaloids. Optimum separation can be achieved in the following conditions: pH 9.0; 25mm borate buffer containing 20 mm sulfobutylether-β-cyclodextrin and 20 mm ionic liquid 1-ethyl-3-methyllimidazole l-lactate;...