Abstract

A novel and very simple capillary electrophoretic method for analyzing aconitine components in Aconitum plants was developed using 1-butyl-3-methylimidazoium tetrafluoroborate (1B-3MI-TFB)-based ionic liquid as running electrolyte solution for the first time. The optimum conditions were 35 mM 1B-3MI-TFB solution (pH 8.50) and 15 kV applied voltage. The detection was performed at 254 nm. Aconitine, meaconitine and hypaconitine in Aconitum plants were separated and identified within 5 min. The recoveries were 91.0-103.0% for hypaconitine, 92.8-96.2% for aconitine and 96.0-106.6% for mesaconitine, respectively. Compared with other methods, the analytical time was decreased 4-8-fold and the effect of Joule heating was weaker because the current was smaller.

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