| 维生素B12在玻碳电极上的电化学行为研究 |
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| 引用本文： | 包晓玉,陈欣,王立萍,解燕玲.维生素B12在玻碳电极上的电化学行为研究[J].南阳师范学院学报,2004,3(9):39-41. |
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| 作者姓名： | 包晓玉 陈欣 王立萍 解燕玲 |
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| 作者单位： | 南阳师范学院,化学系,河南,南阳,473061 |
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| 摘 要： | 在0．1mol／LHAc—NaAc缓冲溶液(pH=4．54)中，用循环伏安法可得到维生素B12的两个还原峰。峰电位EP1=-0．458V，EP2=-0．831V(vs．SCE)。实验表明，维生素B12在玻碳电极上的电极过程为一受吸附控制的不可逆过程。测得还原峰的电子转移系数为0．3，标准速率常数为ks=2．40s^-1。用该法测定了维生素B12针剂中维生素B12的含量，结果与标示含量相吻合。
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| 关 键 词： | 维生素B12 电化学行为 循环伏安法 |
| 文章编号： | 1671-6132(2004)09-0039-03 |
| 修稿时间： | 2004年4月20日 |
Electrochemical Behavior of Vitamin B12 on Glasscarbon Electrode |
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| BAO Xiao-yu,CHEN Xin,WANG Li-ping,XIE Yan-ling.Electrochemical Behavior of Vitamin B12 on Glasscarbon Electrode[J].Journal of Nanyang Teachers College,2004,3(9):39-41. |
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| Authors: | BAO Xiao-yu CHEN Xin WANG Li-ping XIE Yan-ling |
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| Abstract: | In 0.1 mol/L HAc-NaAc buffer solution at pH 4.54, reduction peak of Vitamin B_(12)(VB_(12))was obtained by cyclic voltammetry. The reduction peak potentials were at -0.458V and -0.831V(vs. SCE). The experimental results indicate that the electrode process of VB_(12) on the glass carbon electrode is a irreversible process with absorption. The number of electrode transfer coefficient of reduction peak was 0.30. The rate constant of the surface electrochemical reaction was determined as k_s=2.40s~(-1).It has been applied to determination of VB_(12 )in injection. |
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| Keywords: | Vitamin B_(12) electrochemical behavior cyclic voltammetry |
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