high-performance liquid chromatography on an asahipak gs-320 hydrophilic gel column with tartrate buffer ( 0.015 m , ph 3.0 ) containing 2 mm ethylenediaminetetraacetate and 0.05 % beta-thiodiglycol as the eluent allowed the separation of glucose , diketogulonic acid , dehydroascorbic acid and ascorbic acid within 30 min .
C0011177
dehydroascorbic acid
C0003968
ascorbic