阳极扫描极化反向催化伏安法测定α-生育酚

doi:10.3969/j.issn.0253-2778.2018.03.002

中国科学技术大学学报 ›› 2018, Vol. 48 ›› Issue (3): 184-190.DOI: 10.3969/j.issn.0253-2778.2018.03.002

阳极扫描极化反向催化伏安法测定α-生育酚

史天洋，吴守国，魏巍

中国科学技术大学化学系，安徽合肥 230026

收稿日期:2017-04-18 修回日期:2017-06-20 出版日期:2018-03-31 发布日期:2018-03-31
通讯作者: 吴守国
作者简介:史天洋，女， 1991年生，硕士生.研究方向: 电分析化学. E-mail: tyshi@mail.ustc.edu.cn
基金资助:
国家重点基础研究发展（973）计划(2013CB933900)资助.

Determination of α-tocopherol using positive scan polarization reverse catalytic voltammetry

SHI Tianyang, WU Shouguo, WEI Wei

Department of Chemistry, University of Science and Technology of China, Hefei230026, China）

Received:2017-04-18 Revised:2017-06-20 Online:2018-03-31 Published:2018-03-31

摘要/Abstract

摘要： 用阳极极化的方式在银电极表面形成氧化银纳米粒子，继而以循环电位扫描方法将羧基化石墨烯沉积到该电极表面，成功制备了石墨烯/纳米氧化银/银电极，并应用于碱性溶液中α-生育酚的检测.采用循环伏安法分别对修饰电极和α-生育酚在修饰电极上的催化氧化行为进行了研究.并使用该修饰电极，利用阳极扫描极化反向催化伏安法检测了α-生育酚.实验结果表明，该修饰电极性能稳定，方法灵敏度高，差值峰电流与α-生育酚浓度分别在0.02~0.32 μmol/L 和0.32~4.0 μmol/L范围内存在线性关系，方法检测限达到0.01 μmol/L.

关键词: 电化学催化氧化, 羧基化石墨烯, 生育酚, 氧化银, 阳极扫描极化反向催化伏安法

Abstract: Silver oxide nanoparticles were formed at the surface of a silver electrode with anodic polarization, then the carboxyl graphene-nanosheets were electrodeposited on the silver oxide with cyclic potential scanning, and the graphene/silver oxide/silver electrode was successfully prepared and applied in detection of α-tocopherol in the alkaline medium. The electrochemical behavior and the electrocatalytic activity of the modified electrode were investigated using cyclic voltammetry. The α-tocopherol was detected by means of this modified electrode and the positive scan polarization reverse catalytic voltammetry. The experimental results demonstrate that the thus-prepared modified electrode is stable and has high sensitivity. Two linear relationships between the difference value peak current and the α-tocopherol concentration are obtained in the range of 0.02~0.32 μmol/L and 0.32~4.0 μmol/L respectively, with a limit of detection reaching 0.01 μmol/L.

Key words: electrocatalytic oxidation, carboxyl graphene, tocopherol, silver oxide, positive scan polarization reverse catalytic voltammetry

中图分类号:

O657.1

史天洋，吴守国，魏巍. 阳极扫描极化反向催化伏安法测定α-生育酚[J]. 中国科学技术大学学报, 2018, 48(3): 184-190.

SHI Tianyang, WU Shouguo, WEI Wei. Determination of α-tocopherol using positive scan polarization reverse catalytic voltammetry[J]. Journal of University of Science and Technology of China, 2018, 48(3): 184-190.

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阳极扫描极化反向催化伏安法测定α-生育酚

Determination of α-tocopherol using positive scan polarization reverse catalytic voltammetry

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