FLOW-THROUGH TUBULAR IODIDE AND BROMIDE SELECTIVE ELECTRODES BASED ON EPOXY-RESIN HETEROGENEOUS MEMBRANES

• Tipo: Artigo em Revista Científica Internacional
• Data: 1989

Autores

alegret, s (Autor) Outra; florido, a (Autor) Outra; lima, jlfc (Autor) FFUP; machado, aasc (Autor) Outra

Revista

Título: Talanta

Vol. 36

Páginas: 825-829

ISSN: 0039-9140

Editora: Elsevier

Indexação

ISI Web of Knowledge - 20 Citações

Scopus - 21 Citações

Classificação Científica

FOS: Ciências exactas e naturais > Química

Outras Informações

ID Authenticus: P-001-SHF

DOI: 10.1016/0039-9140(89)80162-6

Abstract (EN): 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.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 5