使用多孔电化学传感器通过阳极溶出伏安法测定单宁酸的详细研究。
A detailed investigation for determination of tannic acid by anodic stripping voltammetry using porous electrochemical sensor.
作者信息
Xu Lijian, He Nongyue, Du Jingjing, Deng Yan, Li Zhiyang, Wang Ting
机构信息
State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, PR China.
出版信息
Anal Chim Acta. 2009 Feb 16;634(1):49-53. doi: 10.1016/j.aca.2008.12.029. Epub 2008 Dec 25.
The electrochemical responses of tannic acid have been obtained at porous pseudo-carbon paste electrode (PPCPE), polypyrrole modified carbon paste electrode (PCPE), SBA-15 modified CPE (SBA-MCPE) and carbon paste electrode (CPE) under same conditions, respectively. The results show that the sensitivity of PPCPE is the highest among all the checked electrodes. The detection limit at PPCPE is 0.01 microM, which is about 10 times lower than that at CPE and is about 5 times lower than that at PCPE or SBA-MCPE. The developed electrode PPCPE possesses a few obvious advantages and no binding reagents are needed. The surface area of PPCPE is 59.26 m(2)g(-1) with pores ranging from 2 to 5 microm in diameter. The PPCPE is easy to preserve and has good reusability, which affords a nice electrochemical platform for detecting tannic acid.
在相同条件下，分别在多孔伪碳糊电极（PPCPE）、聚吡咯修饰碳糊电极（PCPE）、SBA - 15修饰碳糊电极（SBA - MCPE）和碳糊电极（CPE）上获得了单宁酸的电化学响应。结果表明，在所有检测电极中，PPCPE的灵敏度最高。PPCPE的检测限为0.01微摩尔，比CPE的检测限低约10倍，比PCPE或SBA - MCPE的检测限低约5倍。所制备的电极PPCPE具有一些明显的优点，且无需结合试剂。PPCPE的表面积为59.26 m²g⁻¹，孔径范围为2至5微米。PPCPE易于保存且具有良好的可重复使用性，为检测单宁酸提供了一个良好的电化学平台。
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