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Study of electrochemical reduction of selenium (+4) using square wave voltammetry
Author(s) -
Zelić Marina,
Branica Marko
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.1140020607
Subject(s) - hanging mercury drop electrode , selenium , square wave , chemistry , electrochemistry , analytical chemistry (journal) , cathodic stripping voltammetry , dropping mercury electrode , electrode , detection limit , polarography , stripping (fiber) , voltammetry , inorganic chemistry , materials science , chromatography , organic chemistry , voltage , physics , quantum mechanics , composite material
The electrochemical reduction of selenium (+ 4) on hanging mercury drop electrode (HMDE) has been studied using square wave voltammetry (SWV). The product of the first, very complex electrode reaction can be further reduced in a process characterized by reactant and product adsorption. The height of the stripping peak increases up to four times with the addition of Cu 2+ ions, although the electrode reaction becomes less reversible. The square wave cathodic stripping peak currents are an order of magnitude higher than the corresponding differential pulse values, but the detection limit (3 × 10 −10 mol/L) is practically the same for both techniques. The concentration of selenium (+ 4) in rainwater samples has been determined.