Surface Termination Effect of Boron-Doped Diamond on the Electrochemical Oxidation of Adenosine Phosphate

被引:31
作者
Asai, Kai [1 ]
Ivandini, Tribidasari A. [2 ]
Falah, Muhammad M. [2 ]
Einaga, Yasuaki [1 ,3 ]
机构
[1] Keio Univ, Fac Sci & Technol, Dept Chem, Hiyoshi 3-14-1, Yokohama, Kanagawa 2238522, Japan
[2] Univ Indonesia, Fac Math & Sci, Dept Chem, Kampus UI Depok, Jakarta 16424, Indonesia
[3] JST ACCEL, Hiyoshi 3-14-1, Yokohama, Kanagawa 2238522, Japan
关键词
adenosine phosphate; electrochemical oxidation; boron-doped diamond; effect of surface termination; WAVE VOLTAMMETRIC DETERMINATION; PYROLYTIC-GRAPHITE ELECTRODE; CARBON ELECTRODE; ATP; ADENINE; ADENOSINE-5'-TRIPHOSPHATE; MICROELECTRODES; NUCLEOSIDES; ADSORPTION; PYRIMIDINE;
D O I
10.1002/elan.201500505
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
Electrochemical oxidation of adenosine phosphates, including adenosine 5-monophosphate (AMP), adenosine 5-diphosphate (ADP), and adenosine 5-triphosphate (ATP), have been studied using boron-doped diamond (BDD) electrodes. Cyclic voltammograms in phosphate buffer solution pH7.4 showed a typical oxidation peak at the potential of around +1.3V (vs. Ag/AgCl) attributable to the oxidation of adenine base moiety. This peak appears at both cathodically and anodically treated BDD. However, investigation at low pH showed, whereas the oxidation peak could be well observed for the oxidation of each AMP, ADP, and ATP at cathodically treated BDD, it was only found for the oxidation of AMP at anodically-treted BDD electrodes. Linear calibration curve can be achieved in the concentration range of 20 to 200M with an average detection limit of 2M (S/N=3). Furthermore, cathodic treatment has demonstrated its ability to maintain the electrode surface from biofouling, resulting in the excellent stability of current responses.
引用
收藏
页码:177 / 182
页数:6
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