SQUARE-WAVE ANODIC-STRIPPING VOLTAMMETRY IN STATIONARY AND FLOWING SOLUTION - A COMPARATIVE-STUDY

• Tipo: Artigo em Revista Científica Internacional
• Data: 1994

Autores

BRETT, CMA (Autor) Outra; Lima, JLFC (Autor) FFUP; M. Beatriz Q. Garcia (Autor) FFUP

Revista

Título: The Analyst

Vol. 119

Páginas: 1229-1233

ISSN: 0003-2654

Editora: Royal Society of Chemistry

Indexação

ISI Web of Knowledge - 24 Citações

Scopus - 26 Citações

Outras Informações

ID Authenticus: P-001-JZ5

DOI: 10.1039/an9941901229

Abstract (EN): A comparison has been made between square-wave anodic stripping voltammetry (SWASV) at a stationary, mercury thin-film electrode and at a wall-jet mercury thin-film electrode in flowing solution using cadmium(II) and lead(II) as test species. Mercury thin films were prepared on glassy carbon electrode substrates. The effects of square wave amplitude and frequency on the peak current and peak potential in the determination step were studied, and these parameters optimized. Deposition time was varied, and the effect of flow rate in flowing solution investigated. Practical detection limits were found to be 10(-8) mol l(-1) at stationary electrodes and 2 x 10(-9) mol l(-1) at wall-jet electrodes. It was found that SWASV gives good results in the presence and absence of dissolved oxygen for both analysis modes, which augurs well for its future application in dow systems, and particularly at wall-jet electrodes.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 5