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首页> 外文期刊>Electroanalysis >Voltammetric detection of NADH free from interference of ascorbic acid using a glassy carbon electrode modified with an electropolymerized porphyrin film
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Voltammetric detection of NADH free from interference of ascorbic acid using a glassy carbon electrode modified with an electropolymerized porphyrin film

机译：使用电聚合卟啉膜修饰的玻碳电极，伏安法检测NADH不受抗坏血酸的干扰

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摘要

Two square-wave voltammetric (SWV) peaks, at potentials of ca. 0 and 500 mV (vs. Ag/AgCl) are observed at a porphyrin polymer modified glassy carbon (GC) electrode in Tris buffer solution (DH 8.3),that correspond to the electrooxidation of ascorbic acid (AA) and NADH, respectively. Additionally the proposed electrode is free of fouling problems, that are notorious at other modified electrodes. An interesting observation was that the peak associated with the AA electrooxidation was attenuated as the concentration of NADH increased indicating a competition in the electron transfer reaction between the two analytes studied. The NADH peak current was directly related to its concentration below 5 mM with a proportionality constant of 92 muA cm(-2) mM and with the detection limit of 0.5 muM. [References: 26]
机译：两个方波伏安（SWV）峰，电势约为。在Tris缓冲溶液（DH 8.3）中，在卟啉聚合物修饰的玻碳（GC）电极上观察到0和500 mV（vs. Ag / AgCl），分别对应于抗坏血酸（AA）和NADH的电氧化。另外，提出的电极没有结垢问题，这在其他改进的电极上是臭名昭著的。有趣的观察是，随着NADH浓度的增加，与AA电氧化相关的峰被衰减，表明两种被分析物之间的电子转移反应竞争。 NADH峰值电流与浓度低于5 mM直接相关，比例常数为92μAcm（-2）mM，检测极限为0.5μM。 [参考：26]

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