Automatic adsorptive stripping voltammetry at thin-mercury film electrodes (TMFE)

• DOI: 10.1007/bf00323478
• Publication Date: 2004-10-19T10:24:52Z
• Authors: Hans-Joachim Died...; Stefan Meyer; Fritz Scholz
• Keywords: Dimethylglyoxime; Adsorptive stripping voltammetry; Mercury; Anodic Stripping Voltammetry; Glassy carbon; Supporting electrolyte; Stripping (fiber)

A procedure for the automated on-line determination of nickel in aquatic samples was developed. It is based upon adsorptive stripping voltammetry of the dimethylglyoxime complex at a thin-mercury film electrode (TMFE) on glassy carbon substrate. The severe problem of reproducibly renewing the TMFE was solved by the choice of an appropriate electrolyte and a special potential program. With the developed procedure automatic on-line nickel determinations are possible over extended periods of time with standard deviations not higher than 5% and down to 1.3 ppb nickel.