Electrochemical Oxidation of 5-Hydroxytryptamine and 5- Hydroxyindoleacetic Acid at Ultrasmall Gold Ring Electrodes
Abstract
Ultrasmall gold ring electrodes have been constructed by electrodeposition of gold onto carbon ring electrodes. Electrodes thus formed show similar adsorption/desorption peaks for oxygen in H2SO4 solution compared to those obtained at conventional-sized electrodes. These electrodes have been used in conjunction with linear scan voltammetry and subsequent cleaning pulses to obtain repeatable quantitative results for the electro-chemical oxidation of 5-hydroxytryptamine and 5-hydroxyindoleacetic acid. This technique involves the use of a linearly scanned applied potential, followed by a large positive potential to clean the electrode oxidatively and negative potential for electrode activation. The result of the cleaning pulses is that the oxidation products of 5-hydroxytryptamine are cleaned off the electrode and reproducible voltammograms are obtained.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 12, 1991
- Accession Number
- ADA248133
Entities
People
- A. G. Ewing
- D. K. Wong
- G. Luo
- Y. Y. Lau
Organizations
- Pennsylvania State University