File(s) not publicly available
Flow-injection potentiometric determination of free cadmium ions with a cadmium ion-selective electrode
journal contribution
posted on 2023-05-16, 11:20 authored by Trojanowicz, M, Alexander, PW, Hibbert, DBThe determination of free cadmium ions with solid-state cadmium ion-selective electrode can be performed in non-flow measurements in non-buffered solutions in a wide concentration range down to pCd 10. In cadmium ion buffered solutions linear Nernstian response was obtained even down to pCd 12, which is lower, that expected based on calculation of cadmium solubility from the conditional solubility product. Interferences of trace amounts of Fe(III), Cu(II) and Pb(II) commonly present in natural waters in larger concentrations than Cd(II) can be eliminated by reduction with hydroxylamine, complexation with Neocuproine and ion-exchange on anion-exchange resin in sulphate form, respectively. The developed procedure might be suitable for the determination of activity of free cadmium ions in natural water. A preliminary study on this subject is demonstrated for river water sample using stopped-flow flow-injection system. Copyright (C) 1998 Elsevier Science B.V.
History
Publication title
Analytica Chimica ActaVolume
370Issue
2-3Pagination
267-278ISSN
0003-2670Department/School
University CollegePublisher
Elsevier Science BvPlace of publication
Po Box 211, Amsterdam, Netherlands, 1000 AeRepository Status
- Restricted