the photometric determination of ascorbic acid and dehydroascorbic acid by preparing the 2,4-dinitrophenylhydrazone derivative of dehydroascorbic acid and purifying it by thinlayerchromatography was simplified and adapted to the microliter system of eppendorf geratebau , hamburg , germany .
C0003968
ascorbic acid
C0011177
dehydroascorbic acid