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阳极溶出伏安法是在一适当的电位将痕量金属离子预电解富集在汞滴或汞膜电极之后,再以逆向扫描电压氧化被还原的金属,然后根据电流-电位曲线测定金属离子浓度的方法。Janger最近研究了预电解富集后化学氧化工作电极时的电位-时间特性,并将此技术称为电位溶出分析。这种技术引起了人们的注意并设计出一些专用仪器。今年美国Pit-tsburgh分析化学会也介绍了这种新仪器。原理在一含Hg(Ⅱ)和溶于汞的金属离子M(n)的除氧溶液中,用恒电位器加一适当负的电位于玻碳电极,反应
Anodic stripping voltammetry is the pre-electrolysis of trace amounts of metal ions at an appropriate potential to enrich the mercury droplet or mercury film electrode, and then counter-scan voltage oxidation reduction of metal, and then measured according to the current - potential curve of metal ion concentration Methods. Janger recently studied the potential-time characteristics of a chemisorbed working electrode after pre-electrolysis enrichment and referred to this technique as potential dissolution analysis. This technique has aroused people’s attention and designed some special instruments. This year the United States Pit-tsburgh Analytical Chemistry also introduced this new instrument. Principle In an oxygen-containing solution containing Hg (II) and mercury-soluble metal ions M (n), potentiostat plus a suitable negative potential at the glassy carbon electrode, the reaction