The Use of Capillary Zone Electrophoresis for Analysis of Ephedrine and Pseudoephedrine in Food Supplements
AbstraktA simple method based on capillary zone electrophoresis was proposed for the analysis of ephedrine and pseudoephedrine in various commercial food supplements. The proposed method is suitable for a rapid identification and determination of ephedrine and pseudoephedrine in complex matrix of analyzed samples. The described extraction into 5 mM aqueous HCl proved right for a complete release of ephedrine and pseudoephedrine from the analyzed substance. An acidic carrier electrolyte (pH 3.6) containing b-alanine, aspartic acid and heptakis(2,6-di-O-methyl)-ß-cyclodextrin) is the method of choice for complete resolution of both alkaloids.