抗坏血酸通常用2,6-二氯吲哚酚(DCPIP)法或药典法测其含量。这些方法虽可迅速得到分析结果,但不很专属,也不够灵敏。当用于饮料或果汁中抗坏血酸的测定时,带色物质可干扰滴定终点。本文研究了一种药物制剂和果汁中抗坏血酸的含量测定方法,其原理是基于抗坏血酸能将二价铜离子迅速还原成一价铜离子,然后与新亚铜试剂(neocuproine; Ascorbic acid is usually measured by 2,6-dichloroindolol (DCPIP) or pharmacopoeia. Although these methods can be quickly obtained the results of the analysis, but not very exclusive, not sensitive enough. When used in the determination of ascorbate in beverages or juices, the colored material can interfere with the titration end point. In this paper, we studied a method for the determination of ascorbic acid in pharmaceutical preparations and fruit juices based on the rapid reduction of divalent copper ions to monovalent copper ions by ascorbic acid and subsequent reaction with neocuproine