Simultaneous Determination of Nickel and Cobalt Using a Solid Bismuth Vibrating Electrode by Adsorptive Cathodic Stripping Voltammetry

• Tipo: Artigo em Revista Científica Internacional
• Data: 2013

Autores

GMS Alves (Autor) Outra; JMCS Magalhães (Autor) Outra; Helena MVM Soares (Autor) FEUP

Revista

Título: Electroanalysis

Vol. 25

Páginas: 1247-1255

ISSN: 1040-0397

Editora: Wiley-Blackwell

Indexação

ISI Web of Knowledge - 22 Citações

ISI Web of Science

Scopus - 32 Citações

Classificação Científica

FOS: Ciências exactas e naturais

CORDIS: Ciências Físicas

Outras Informações

ID Authenticus: P-005-11D

DOI: 10.1002/elan.201200643

Abstract (EN): A simple, fast, sensitive and greener voltammetric procedure for simultaneous analysis of nickel (Ni) and cobalt (Co) by square wave adsorptive cathodic stripping voltammetry (SW-AdCSV) using a solid bismuth vibrating electrode is presented for the first time. The procedure enables to determine Ni together with Co, in ammonia buffer 0.1M (pH9.2) and in the presence of oxygen, and involves an adsorptive accumulation of metal-dimethylglyoxime (Ni-DMG and Co-DMG) complexes on the electrode surface. For Ni and Co, the detection limits, obtained with 30s of accumulation time, were 0.6 and 1.0 mu gL1, respectively. The method was free of metals (Cd2+, Cr3+, Cr6+, Cu2+, Fe3+ and Pb2+ up to 50 mu gL1, Al3+ and Mn2+ up to 500 mu gL1; Zn2+ up to 300 mu gL1) interferences up to the concentrations mentioned in brackets. The proposed method was validated for simultaneous determination of Ni and Co in a certified reference surface and river waters with good results.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 9