Oxidation reduction potential of ascorbic acid (Vitamin C)
Oxidation reduction potential of ascorbic acid (Vitamin C)
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DOI：
10.1073/pnas.19.9.875
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发表时间：
1933-01-01
影响因子：
11.1
通讯作者：
Keighley, G
中科院分区：
文献类型：
--
作者：
Borsook, H;Keighley, G
曲线为pKa= 4.17的理论值，pKo= 9.0 0为实验值，还原和氧化形式被视为一价酸。为了简单起见，我们忽略了第二离解常数。Birch和Harris4发现pKE的值约为4.17。通过比色滴定法，我们发现pKoC值约为9.0。取n值为2，这由碘滴定的结果表示，并由观察到的
Curve is theoretical for pKa= 4.17, pKo= 9.0 0 are experimental values the reduced and oxidized forms considered as monovalent acids. For simplicity we have ignored the second dissociation constants. Birch and Harris4 found the value of pKE to be about 4.17. By a colorimetric titration procedure we have found the value of pKoC to be approximately 9.0. The value of n was taken as 2, which was indicated by the results of the iodine titration, and corroborated by the agreement between the observed