A quick method for the simultaneous determination of ascorbic acid and sorbic acid in fruit juices by capillary zone electrophoresis

摘要: Abstract A method of quickly determining ascorbic acid and sorbic by capillary zone electrophoresis with ultraviolet detection was developed. The choice background electrolyte, wavelength, injection time applied voltage were discussed. Ascorbic well separated in 80 mmol L−1 boric acid–5 mmol L−1borax (pH = 8.0) 5 min at the detecting wavelength 270 nm. Under optimum condition, has linear ranges 2.54–352.00 mg L−1 for 1.08–336.39 mg L−1 limit 1.70 mg L−1 0.54 mg L−1 acid, respectively. Other organic acids fruit juices have no effect on detection. This is very feasible simple can be used to detect juices.