Voltammetric Study of Ascorbic Acid Using Polymelamine/Gold Nanoparticle Modified Carbon Paste Electrode

12th Congress of Indonesian Soc. for Biochemistry and Molecular Biology in Conjunction With The 2nd Int. Conf. "Collaboration Seminar of Chemistry and Industry

生物科学;化学

Farida, A.N.^1 ; Fitriany, E.^1 ; Baktir, A.^1 ; Kurniawan, F.^2 ; Harsini, M.^1

Department of Chemistry, Faculty of Science and Technology, Universitas Airlangga, Kampus C Mulyorejo, Surabaya

60115, Indonesia^1

Department of Chemistry, Faculty of Natural Science, Institut Teknologi Sepuluh Nopember, Jl. Raya ITS, Sukolilo, Surabaya

60111, Indonesia^2

关键词: Carbon paste electrode;    Cyclic potential;    Electrochemical behaviors;    Modified carbon paste electrode;    Negative potential;    Peak separations;    Phosphate buffers;    Voltammetric studies;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/217/1/012004/pdf
DOI  :  10.1088/1755-1315/217/1/012004

学科分类：生物科学（综合）

来源: IOP

【 摘 要 】

Polymelamine/gold nanoparticle modified carbon paste electrode (PM/AuNPs/CPE) has been developed for voltammetric study of ascorbic acid (AA). The PM/CPE was prepared onto carbon paste electrode surface via electropolymerization, then it has been deposited gold nanoparticle (AuNPs) via electrodeposition for PM/AuNPs/CPE. In pH 7.0 phosphate buffer, PM/AuNPs/CPE was oxidized during the cyclic potential sweep between 0.0 V and 1.5 V, forming polymer and gold nanoparticle at the carbon paste electrode (CPE) surface. The electrochemical behavior of ascorbic acid at the bare CPE, PM/CPE, AuNPs/CPE and PM/AuNPs/CPE were investigated. The oxidation peak potential of ascorbic acid shifts to more negative potential at PM/AuNPs/CPE Moreover, the oxidation peak current significantly increases at PM/AuNPs/CPE. The PM/AuNPs/CPE electrode exhibits a quasi-reversible electron with a peak separation 130 mV. These fenomena indicate that PM/AuNPs/CPE shows highly-efficient catalytic activity to the oxidation of ascorbic acid.