using a novel high performance liquid chromatography ( hplc ) determination of ascorbic acid and dehydroascorbic acid , we have measured the relative amounts of ascorbate and dehydroascorbate in 20 normal controls and in paired sera and synovial fluid from 13 patients with rheumatoid arthritis ( ra ) .
C0003968
ascorbic acid
C0011177
dehydroascorbic acid