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在纯溶液、药物制剂、食物、生物体液中抗坏血酸可用邻亚碘酰基苯甲酸盐滴定,以无色—2,6—二氯靛酚加碘化钾为指示剂,目视或分光计检定终点。半胱氨酸、谷胱甘肽干扰定量,可由氰乙化作用掩蔽。氰乙化产物和蛋氨酸可在酸化溴化钾存在下,以甲基红为指示剂,用邻亚碘酰基苯甲酸盐滴定。抗坏血酸与蛋氨酸,半胱氨酸或谷胱甘肽混合物的分析:第1份首先测定抗坏血酸与半胱氨酸或谷胱甘肽的总量:取原被测液一定体
Ascorbic acid can be titrated with o-iodosobenzoate in pure solution, pharmaceutical preparation, food and biological fluid, and colorless or 2,6-dichloroindophenol with potassium iodide as indicator to visualize or spectrophotometrically determine the end point. Cysteine, glutathione interference quantitative, can be masked by cyanogen acetylation. The cyanogenated product and methionine can be titrated with o-iodosobenzoate with methyl red as an indicator in the presence of acidified potassium bromide. Ascorbic acid and methionine, cysteine or glutathione mixture analysis: The first first determination of total ascorbic acid and cysteine or glutathione: Take the original test fluid fixed body