Anodic Stripping Voltammetry of Arsenic(III) Using Gold Nanoparticle-Modified Electrodes

作者：Xuan Dai, Olga Nekrassova, Michael E. Hyde, Richard G. Compton · 发表于：Analytical Chemistry · 年份：2004 · DOI：10.1021/ac049232x · 被引用次数：489 · 研究领域：Electrochemical Analysis and Applications、Arsenic contamination and mitigation、Advanced biosensing and bioanalysis techniques

A novel method for the detection of arsenic(III) in 1 M HCl at a gold nanoparticle-modified glassy carbon electrode has been developed. The gold nanoparticles were electrodeposited onto the glassy carbon electrode via a potential step from +1.055 to -0.045 V vs SCE for 15 s from 0.5 M H2SO4 containing 0.1 mM HAuCl4. The resulting electrode surfaces were characterized with both AFM and cyclic voltammetry. Anodic stripping voltammetry of arsenic(III) on the modified electrode was performed. After optimization, a LOD of 0.0096 ppb was obtained with LSV.