Adsorptive stripping voltammetry of nickel with 1-nitroso-2-napthol using a bismuth film electrode

Rodrigo Segura, Milenco Pradena, Deny Pinto, Fernando Godoy, Edgar Nagles, Verónica Arancibia

Research output: Contribution to journalArticlepeer-review

25 Scopus citations

Abstract

A sensitive procedure is presented for the voltammetric determination of nickel. The procedure involves an adsorptive accumulation of nickel 1-nitroso-2-napthol (NN) complex on a bismuth film electrode prepared ex situ by electrodeposition. The most suitable operating conditions and parameters such as pH, ligand concentration (CNN), adsorptive potential (E ads), adsorptive time (tads), scan rate and others were selected and the determination of nickel in aqueous solutions using the standard addition method was possible. The adsorbed Ni-NN complex gives a well defined cathodic stripping peak current at -0.70 V, which was used for the determination of nickel in the concentration range of 10.0-70.0 μg L-1 (pH 7.5; CNN 6.5 μmol L-1; Eads -0.30 V; t ads 60 s) with a detection limit of 0.1 μg L-1. The relative standard deviation for a solution containing 10.0 μg L-1 of Ni(II) was 3.5% (n = 4). The proposed method was validated determining Ni(II) in certified reference waste water (SPS-WW1) and Certified Reference Water for Trace Elements (TMDA 51.3) with satisfactory results. Then lake water samples were analyzed.

Original languageEnglish
Pages (from-to)2316-2319
Number of pages4
JournalTalanta
Volume85
Issue number5
DOIs
StatePublished - 15 Oct 2011

Bibliographical note

Funding Information:
Financial support by the “ Fondo de Desarrollo Científico y Tecnológico ” (FONDECYT), Chile, under project no. 11070046 is gratefully acknowledged.

Keywords

  • 1-Nitroso-2-napthol
  • Adsorptive stripping voltammetry
  • Bismuth film electrode
  • Nickel

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