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用选择性分光光度法测定药品和食品中的抗坏血酸埃及发展了一种测定抗坏血酸的新型分析方法。该法是基于抗坏血酸在０．２ＭＮａｏＨ存在下与４─氯─７─硝基苯并夫咱烷（ＮＢＤ─Ｃｌ）反应，用５０％（Ｖ／Ｖ）丙酮水溶液稀释后，显出蓝绿色（入＿（ｍａｘ）＝５５２ｎ...
Determination of Ascorbic Acid in Pharmaceuticals and Foods by Selective Spectrophotometry A novel analytical method for the determination of ascorbic acid has been developed. This method is based on the reaction of ascorbic acid with 4-chloro-7-nitrobenzofurazane (NBD-Cl) in the presence of 0.2 M NaOH and after dilution with 50% (v / Into _ (max) = 552n ...