Spectrophotometric determination of ascorbic acid and thiamine hydrochloride in pharmaceutical products using derivative spectrophotometry.
D001205:Ascorbic Acid / Q000032:analysis*; D055598:Chemical Phenomena; D002621:Chemistry; D013056:Spectrophotometry, Ultraviolet; D013831:Thiamine / Q000032:analysis*
D001205:Ascorbic Acid; D013831:Thiamine