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The use of a combined working(glassy carbon mercury film electrode)-counter-reference electrode and a rotating sample platform for the reliable determination of selenium in biological and environmental materials by cathodic stripping potentiometry is described. The optimum conditions for the determination of selenium by this method include an electrolyte consisting of 2 M HCl and 1 M CaCl 2 ...
The influence of a saturated Triton X-100 layer on glassy carbon based mercury film electrodes when used for stripping potentiometry determination of mono-, di- and trivalent ions has been investigated. By using an electrode assembly, permitting medium exchange at a controlled potential, it has been possible to study, separately, the influence of such a layer on the electrolysis step and on the stripping...
A novel glassy carbon electrode design, permitting medium exchange in batch mode without loss of electrode potential control, has been used for the study of copper(I) and copper(II) species formed during constant current stripping oxidation of copper in chloride media. It was found that copper(II) species dominated at chloride concentrations below about 1 mM and that soluble copper(I) species dominated...
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