TY - JOUR
T1 - Determination of sub-μgl-1 concentrations of copper by anodic stripping voltammetry at the gold electrode
AU - Bonfil, Y.
AU - Brand, M.
AU - Kirowa-Eisner, E.
PY - 1999/4/16
Y1 - 1999/4/16
N2 - A rotating disc gold electrode is used for the determination of copper in μgl-1 and sub-μgl-1 concentrations without removal of oxygen by the method of subtractive anodic stripping voltammetry (SASV). The detection limit for a 90s electrodeposition is 0.2nM.The reduction and stripping of copper on gold under the SASV conditions are underpotential deposition/dissolution phenomena. A uniformly distributed submonolayer of copper, occupying 0.01-5% of the real surface of the electrode, is formed. Linearity in calibration plot is obtained up to 5% electrode coverage; in terms of the experimental parameters of the deposition step (rate of rotation and time of electrolysis), this condition for linearity is C(Cu2+)N(1/2)t(d)≤7x105nMrpm(1/2)s.The bulk and underpotential deposition of Cu2+ have been characterized in the supporting electrolyte used (10mM HNO3 and 10mM NaCl).The analysis of copper in drinking and in sea waters has been performed. Copyright (C) 1999 Elsevier Science B.V.
AB - A rotating disc gold electrode is used for the determination of copper in μgl-1 and sub-μgl-1 concentrations without removal of oxygen by the method of subtractive anodic stripping voltammetry (SASV). The detection limit for a 90s electrodeposition is 0.2nM.The reduction and stripping of copper on gold under the SASV conditions are underpotential deposition/dissolution phenomena. A uniformly distributed submonolayer of copper, occupying 0.01-5% of the real surface of the electrode, is formed. Linearity in calibration plot is obtained up to 5% electrode coverage; in terms of the experimental parameters of the deposition step (rate of rotation and time of electrolysis), this condition for linearity is C(Cu2+)N(1/2)t(d)≤7x105nMrpm(1/2)s.The bulk and underpotential deposition of Cu2+ have been characterized in the supporting electrolyte used (10mM HNO3 and 10mM NaCl).The analysis of copper in drinking and in sea waters has been performed. Copyright (C) 1999 Elsevier Science B.V.
KW - Anodic stripping voltammetry
KW - Copper
KW - Gold electrode
KW - Trace analysis
KW - Underpotential deposition
UR - http://www.scopus.com/inward/record.url?scp=0032998343&partnerID=8YFLogxK
U2 - 10.1016/S0003-2670(99)00066-5
DO - 10.1016/S0003-2670(99)00066-5
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AN - SCOPUS:0032998343
VL - 387
SP - 85
EP - 95
JO - Analytica Chimica Acta
JF - Analytica Chimica Acta
SN - 0003-2670
IS - 1
ER -