| 纳米金修饰玻碳电极对鸟嘌呤的催化氧化 |
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| 引用本文： | 张敏,程发良,蔡志泉.纳米金修饰玻碳电极对鸟嘌呤的催化氧化[J].分析测试学报,2010,29(7). |
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| 作者姓名： | 张敏 程发良 蔡志泉 |
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| 作者单位： | 1. 东莞理工学院,生物传感器研究中心,广东,东莞,523106;中山大学化学与化学工程学院,广东,广州,510275
2. 东莞理工学院,生物传感器研究中心,广东,东莞,523106 |
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| 基金项目： | 国家自然科学基金资助项目，广东省科技攻关资助项目，广东省自然科学基金资助项目，东莞市科技计划资助项目 |
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| 摘 要： | 采用电化学沉积法制备了纳米金修饰玻碳电极,并用循环伏安法和电化学阻抗法进行了表征,以此建立了一种直接测定鸟嘌呤的电分析方法。在磷酸盐缓冲溶液(pH 6.0)中,研究了鸟嘌呤在纳米金修饰电极上的电化学行为,实验结果表明,纳米金修饰电极可以增强鸟嘌呤在电极表面的吸附,并加快鸟嘌呤在电极表面的电子传输,使其电化学信号明显增大,检测灵敏度大大提高,该修饰电极对鸟嘌呤表现出良好的电催化性能。在优化实验条件下对鸟嘌呤进行测定,方法的线性范围为8.0×10-7~6.0×10-5mol/L,检出限为1.0×10-8mol/L,在鸟嘌呤浓度为1.0×10-5mol/L时测得RSD(n=10)为2.5%。
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| 关 键 词： | 纳米金修饰电极 鸟嘌呤 电催化氧化 |
Electrochemical Study of Guanine at Nano-gold Modified Glassy Carbon Electrode |
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| ZHANG Min,CHENG Fa-liang,CAI Zhi-quan.Electrochemical Study of Guanine at Nano-gold Modified Glassy Carbon Electrode[J].Journal of Instrumental Analysis,2010,29(7). |
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| Authors: | ZHANG Min CHENG Fa-liang CAI Zhi-quan |
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| Institution: | ZHANG Min1,2,CHENG Fa-liang1,CAI Zhi-quan1 (1.Biosensor Research Center,Dongguan University of Technology,Dongguan 523106,China,2.School of Chemistry and Chemical Engineering,Sun Yat-sen University,Guangzhou 510275,China) |
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| Abstract: | A direct electrochemical method for the determination of guanine was established.A nano-gold modified glassy carbon electrode(NG/GCE)was prepared by electrodepositon and characterized by cyclic voltammetry(CV)and electrochemical impedance spectrum(EIS).In the phosphate buffer solution of pH 6.0,the electrochemical behavior of guanine at the NG/GCE was studied.Results indicated that the oxidation process of guanine at the NG/GCE was an irreversible process.Compared with that of bare glassy carbon electrode,t... |
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| Keywords: | nano-gold modified glassy carbon electrode(NG/GCE) guanine electrocatalytic oxidation |
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