Simultaneous voltammetric determination of guanine and adenine by using a glassy carbon electrode modified with a composite consisting of carbon quantum dots and overoxidized poly(2-aminopyridine)

被引：0
作者：
Shaoying He
Ping He
Xiaojuan Zhang
Xingquan Zhang
Faqin Dong
Lingpu Jia
Licheng Du
Hong Lei
机构：
[1] Southwest University of Science and Technology,School of Materials Science and Engineering
[2] Mianyang Kingtiger New Energy Technology Co. Ltd.,Center of Analysis and Test
[3] Southwest University of Science and Technology,Key Laboratory of Solid Waste Treatment and Resource Recycle of Ministry of Education
[4] Southwest University of Science and Technology,undefined
来源：
Microchimica Acta | 2018年 / 185卷
关键词：
Electrochemical polymerizantion; Nanomaterials; Electrocatalysis; Cyclic voltammetry; Differential pulse voltammetry;
D O I：
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学科分类号：
摘要：
A composite consisting of carbon quantum dots (CQDs) and overoxidized poly(2-aminopyridine) (PAPox) was deposited on a glassy carbon electrode (GCE) through electrochemical polymerization and electrochemical oxidation. The modified GCE was used for the simultaneous determination of guanine and adenine. Electrochemical responses to guanine and adenine were investigated by cyclic voltammetry and differential pulse voltammetry. Owing to the synergistic effect of CQDs and PAPox, two oxidation peaks can be observed, with peaks at 0.81 and 1.13 V (vs. SCE) for guanine and adenine, respectively. The current at the respective peaks has a linear dependence on the concentrations of guanine in the range from 1.0 to 65 μM, and of adenine in the range from 2.0 to 70 μM. The respective detection limits are 0.51 and 0.39 μM (at an S/N ratio of 3). The modified GCE is selective, reproducible and stable.
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