Ionic Liquid-Modified Copper Phosphate Electrodes for the Detection of alpha-Amino Acids in a Weakly Alkaline Solution

作者：Lee Ming Yuan; Chang Jeng Kuei; Wu Ching Chou; Peng Jinchyau

来源：Journal of the Electrochemical Society, 2016, 163(14): B768-B774.

DOI：10.1149/2.1381614jes

The effect of ionic liquid (IL) coating on the electrochemical properties of preoxidized Cu-3(PO4)(2) (ox-Cu-3(PO4)(2)) electrodes was explored in pH-varied Na2HPO4 solutions. The IL of N-propyl-N-methylpyrrolidinium bis(trifluoromethanesulfonyl)imide (PMPy-TFSI) was found to stabilize the redox properties of ox-Cu-3(PO4)(2) electrodes in weakly acid and alkaline solutions. Furthermore, the amperometric response of the PMPy-TFSI/ox-Cu-3(PO4)(2) electrodes presented good linearity in the range of 91-500 mu M for most a-amino acids (AAs). The PMPy-TFSI/ox-Cu-3(PO4)(2) electrodes are equipped with a high performance liquid chromatography system to perform the good selectively and specific detection of AAs. The PMPy-TFSI coating shows promise for the wider application of ox-Cu-3(PO4)(2) electrodes in acidic and alkaline solutions for the detection of electroactive and nonelectroacitve AAs.

• 出版日期2016
• 单位中央民族大学