Poly(pyridine‐3‐boronic acid)/Multiwalled Carbon Nanotubes Modified Glassy Carbon Electrodes for Simultaneous Determination of Ascorbic Acid, 3,4‐Dihydroxyphenylacetic Acid and Uric Acid |
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Authors: | Zhijiao Wu Hong Zhao Ying Xue Yujian He Xiangjun Li Zhuobin Yuan |
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Institution: | 1. College of Chemistry and Chemical Engineering, Graduate University of Chinese Academy of Sciences, 19A YuQuan Road, Beijing 100049, P.?R. China tel.: +86‐10‐88256285;2. fax: +86‐10‐88256092 |
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Abstract: | Poly(pyridine‐3‐boronic acid) (PPBA)/multiwalled carbon nanotubes (MWCNTs) composite modified glassy carbon electrode (GCE) was used for the simultaneous determination of ascorbic acid (AA), 3,4‐dihydroxyphenylacetic acid (DOPAC) and uric acid (UA). The anodic peaks for AA, DOPAC and UA at the PPBA/MWCNTs/GCE were well resolved in phosphate buffer solution (pH 7.4). The electrooxidation of AA, DOPAC and UA in the mixture solution was investigated. The peak currents increase with their concentrations increasing. The detection limits (S/N=3) of AA, DOPAC and UA are 5 µM, 3 µM and 0.6 µM, respectively. |
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Keywords: | Poly(pyridine‐3‐boronic acid) Ascorbic acid 3 4‐Dihydroxyphenylacetic acid Uric Acid Simultaneous determination Nanotubes |
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