线性扫描伏安法
化学
伏安法
分析化学(期刊)
烟酰胺腺嘌呤二核苷酸
电化学
循环伏安法
电极
催化作用
无机化学
物理化学
NAD+激酶
有机化学
酶
作者
Á. Molina,Joaquı́n González,Manuela López‐Tenés,Carmen M. Soto
标识
DOI:10.1002/elan.200804472
摘要
Abstract The homogeneous catalytic oxidation of coenzyme nicotinamide adenine dinucleotide (NADH) with dopamine at a thiolactic acid modified gold spherical electrode of radius 0.0128 cm has been studied in aqueous phosphate media (pH 7.0) using linear sweep voltammetry and chronopotentiometry with power time and exponential time currents. We have proved that, under the conditions of this study, the steady state is reached, in such a way that the expressions for the I − E and d I /d E − E responses are simplified and become independent of time and the electrochemical technique employed. Therefore, the experimental I − E and d I /d E − E curves obtained in chronopotentiometry and linear sweep voltammetry are practically superimposable and, from easy expressions for the peak parameters of the d I /d E − E curves deduced in this paper, values of the chemical and electrochemical rate constants have been obtained.
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