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

• Type: Article in International Scientific Journal
• Date: 2013

Authors

GMS Alves (Author) Other; JMCS Magalhães (Author) Other; Helena MVM Soares (Author) FEUP

Journal

Title: Electroanalysis

Vol. 25

Pages: 1247-1255

ISSN: 1040-0397

Publisher: Wiley-Blackwell

Indexing

ISI Web of Knowledge - 22 Citations

ISI Web of Science

Scopus - 32 Citations

Scientific classification

FOS: Natural sciences

CORDIS: Physical sciences

Other information

Authenticus ID: 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 9