Ứng dụng phương pháp điện di mao quản trong phân tích hàm lượng taurin, cholin, axit pantothenic, axit ascorbic và niacin nhằm kiểm soát chất lượng thực phẩm bổ sung

Abstract

This study presented the application of capillary electrophoresis (CE) for determination of taurine, choline, pantothenic acid (vitamin B5), ascorbic acid (vitamin C) and niacin (vitamin B3) in dietary supplements. The range of the calibration curves were 2.0 ÷ 50 mg/L, and the linearities were good (R2 ≥ 0.997). The methods had good accuracy with high recoveries (89.3 ÷ 98.0% with deionized water and 94.7% ÷ 108.7% with real samples) and the differences of less than 10% in reference analysis for taurine by high performance liquid chromatography (HPLC). Analytical results showed that the concentrations of taurine in most samples were consistent with the label (<8%, except for TP5 sample), while the concentrations of choline and vitamins were variable when the obtained results were quite different from the product information (up to 129.4%).