Stripping potentiometry of indium in aqueous chloride solutions

Stripping potentiometry (SP) has been used effectively for the determinatio n of trace levels of several metal species in solution. Indium ion, which c an be readily reduced and has a high solubility in mercury, can be determin ed directly using SP. The reduction potential of indium is located between those of lead and cadmium, necessitating optimization of several experiment al parameters for successful quantitative analysis. A method for the SP of In(III) is presented which utilizes constant current stripping analysis (CC SA) at a mercury-film glassy carbon electrode in KCI solutions in the prese nce of Pb(II) and Cd(II). (C) 2001 Elsevier Science B.V. All rights reserve d.