Carbohydrate determination with 4-hydroxybenzoic acid hydrazide (PAHBAH): Effect of bismuth on the reaction

摘要: Abstract Addition of sodium bismuth tartrate to a carbohydrate reagent consisting 4-hydroxybenzoic acid hydrazide in aqueous hydroxide enables the reaction be carried out more rapidly, at lower temperature, and with four- fivefold greater sensitivity. A catalytic effect is involved. Under optimum conditions, bismuth-catalyzed gives close theoretical maximum yields colored products. The specificity for different carbohydrates qualitatively but not quantitatively same without bismuth.