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Photomicroscopic measurement of the diffusion layer around mercury drop electrodes: Part I, description of the electrochemical system
Author(s) -
Tercier M.L.,
Bernard C.,
Bujard F.,
Rodak S.,
Buffle J.
Publication year - 1990
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.1140020203
Subject(s) - electrode , mercury (programming language) , drop (telecommunication) , diffusion layer , anode , capillary action , electrochemistry , analytical chemistry (journal) , dropping mercury electrode , materials science , chemistry , mechanics , composite material , chromatography , electrical engineering , physics , computer science , programming language , engineering
A special electrochemical system has been developed to determine the optimum conditions for the stirred deposition step of anodic stripping voltammetric techniques with the sessile mercury drop electrode (SMDE) in order to get a reproducible flux that is predictable on sound theoretical grounds. The sessile Hg drop is formed at the upper part of a vertical capillary, which is placed coaxially below a rotating disc electrode that serves as both an auxilliary electrode and a stirrer. This system permits the visualization of the hydrodynamic flux, diffusion layer, and screening effects of the capillary around the mercury drop.