Ultra performance liquid chromatography (UPLC) and high-performance liquid chromatography (HPLC)
methods for determination of ascorbic acid (AA) and total AA (TAA) contents (as the sum of AA and dehy-droascorbic acid (DHAA) after its reduction to AA) in fruit beverages and in pharmaceutical preparations
were compared. Both methods are rapid: total time of analysis was 15 and 6 min for HPLC and UPLC
methods, respectively.