Flow-through tubular iodide and bromide selective electrodes based on epoxy resin heterogeneous membranes

S. Alegret, A. Florido, J. L.F.C. Lima, A. A.S.C. Machado

Research output: Contribution to journalArticleResearchpeer-review

23 Citations (Scopus)

Abstract

Tubular all-solid-state iodide and bromide selective electrodes with channels drilled through the crystalline heterogeneous membranes have been prepared for use in flow-injection analysis (FIA). The membranes, made with AgX/Ag2S powdered mixtures (X = I, Br) dispersed in a non-conductive epoxy resin, were assembled inside a hollow cylindrical support of conductive epoxy resin. The response characteristics of these detectors, in a low-dispersion FIA system, have been evaluated. Both show a Nernstian response over the range between 5 × 10-5 and O.1M X-, good reproducibility and fast response, which allows a sampling rate of 60/hr. Operational pH ranges from 2.5 to 11 and from 3 to 10 were obtained for the iodide and bromide electrodes respectively. Iodide must be absent in determinations with the bromide electrode. © 1989.
Original languageEnglish
Pages (from-to)825-829
JournalTalanta
Volume36
Issue number8
DOIs
Publication statusPublished - 1 Jan 1989

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