大学化学2026，Vol.41Issue(5)：275-284,10.DOI:10.12461/PKU.DXHX202511142
阳极溶出伏安法测定水中微量镉的无汞化改进
Mercury-free improvement of anodic stripping voltammetry for the determination of trace cadmium in water
摘要
Abstract
Anodic stripping voltammetry(ASV)employing mercury-film electrodes(MFEs)has been widely adopted as a standard technique for trace cadmium detection and incorporated into undergraduate laboratory programs.However,conventional MFEs present significant drawbacks including mercury contamination risks and poor reproducibility,along with excessive cadmium consumption during experiments.In this study,we developed an innovative mercury-free electrode utilizing a composite material of low-toxicity eutectic gallium-indium(EGaIn)alloy and electrochemically reduced graphene oxide(erGO).By implementing square-wave voltammetry instead of linear sweep voltammetry,an improved protocol for trace cadmium determination was established.Experimental results demonstrated substantial enhancements in signal stability and sensitivity.Notably,the modified method reduced cadmium consumption by over two orders of magnitude while decreasing experimental costs by approximately 50%,showcasing its environmental and economic advantages.This redesigned experiment integrates multidisciplinary concepts from analytical chemistry,materials science,and physical chemistry,addressing contemporary environmental concerns while providing a safer,cost-effective alternative.The approach not only enhances students'practical skills but also fosters research interest and innovative thinking in electroanalytical chemistry,making it highly suitable for undergraduate laboratory education.关键词
仪器分析/阳极溶出伏安法/镉离子检测/实验教学Key words
Instrumental analysis/Anodic stripping voltammetry/Cadmium ion detection/Laboratory teaching分类
社会科学引用本文复制引用
周浩彬,李昆,杜帅,郭雪松,王玥,钟琴,王童,王玉枝,宦双燕,颜海龙..阳极溶出伏安法测定水中微量镉的无汞化改进[J].大学化学,2026,41(5):275-284,10.基金项目
湖南省普通本科高校教学改革研究项目(202502000209) （202502000209）
湖南大学课程思政示范课程建设项目(基础分析化学实验) （基础分析化学实验）
