TY - JOUR
T1 - Adsorptive stripping voltammetry of nickel with 1-nitroso-2-napthol using a bismuth film electrode
AU - Segura, Rodrigo
AU - Pradena, Milenco
AU - Pinto, Deny
AU - Godoy, Fernando
AU - Nagles, Edgar
AU - Arancibia, Verónica
N1 - Funding Information:
Financial support by the “ Fondo de Desarrollo Científico y Tecnológico ” (FONDECYT), Chile, under project no. 11070046 is gratefully acknowledged.
PY - 2011/10/15
Y1 - 2011/10/15
N2 - 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.
AB - 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.
KW - 1-Nitroso-2-napthol
KW - Adsorptive stripping voltammetry
KW - Bismuth film electrode
KW - Nickel
UR - http://www.scopus.com/inward/record.url?scp=80053570891&partnerID=8YFLogxK
U2 - 10.1016/j.talanta.2011.07.062
DO - 10.1016/j.talanta.2011.07.062
M3 - Artículo
AN - SCOPUS:80053570891
SN - 0039-9140
VL - 85
SP - 2316
EP - 2319
JO - Talanta
JF - Talanta
IS - 5
ER -