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Title: Determining trace concentrations of copper in water by cathodic film stripping voltammetry with adsorptive collection

Abstract

Trace concentrations of copper (II) in natural water samples were determined by CSV of a film of copper-catechol complex ions adsorbed on a hanging mercury drop electrode (HMDE). Complexation with copper (II) is not selective for copper, but complexes with copper (II) are rather strong; additionally, the reduction potentials of various competing heavy metal ions such as lead (II) and cadmium (II) are well separated from that of copper (II). Addition of a large surplus of catechol (0.0001 to 0.001 M) further ensures that effectively 100% of all copper (II) ions is present in the catechol-complex ion form. After collection the current is measured for the reduction of copper (II) to copper (O) by CVS of the collected film using differential pulse modulation. The detection limit of the technique is below 10 to the minus 10th power M copper (II) for a collection time of 3 minutes, but the sensitivity can be further increased four-fold by collecting for 15 minutes. The sensitivity is reduced by high concentrations of competing trace metals and of surfactants. 10 references, 3 figures, 1 table.

Authors:
Publication Date:
Research Org.:
Liverpool Univ., England
OSTI Identifier:
6431330
Resource Type:
Journal Article
Journal Name:
Anal. Lett.; (United States)
Additional Journal Information:
Journal Volume: 17:A19
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; COPPER; MEASURING METHODS; WATER; QUANTITATIVE CHEMICAL ANALYSIS; CADMIUM; ELECTRODES; LEAD; MERCURY; PYROCATECHOL; VOLTAMETRY; AROMATICS; CHEMICAL ANALYSIS; DEVELOPERS; ELEMENTS; HYDROGEN COMPOUNDS; HYDROXY COMPOUNDS; METALS; ORGANIC COMPOUNDS; OXYGEN COMPOUNDS; PHENOLS; POLYPHENOLS; TRANSITION ELEMENTS; 520200* - Environment, Aquatic- Chemicals Monitoring & Transport- (-1989)

Citation Formats

van den Berg, C M.G. Determining trace concentrations of copper in water by cathodic film stripping voltammetry with adsorptive collection. United States: N. p., 1984. Web. doi:10.1080/00032718408065362.
van den Berg, C M.G. Determining trace concentrations of copper in water by cathodic film stripping voltammetry with adsorptive collection. United States. https://doi.org/10.1080/00032718408065362
van den Berg, C M.G. 1984. "Determining trace concentrations of copper in water by cathodic film stripping voltammetry with adsorptive collection". United States. https://doi.org/10.1080/00032718408065362.
@article{osti_6431330,
title = {Determining trace concentrations of copper in water by cathodic film stripping voltammetry with adsorptive collection},
author = {van den Berg, C M.G.},
abstractNote = {Trace concentrations of copper (II) in natural water samples were determined by CSV of a film of copper-catechol complex ions adsorbed on a hanging mercury drop electrode (HMDE). Complexation with copper (II) is not selective for copper, but complexes with copper (II) are rather strong; additionally, the reduction potentials of various competing heavy metal ions such as lead (II) and cadmium (II) are well separated from that of copper (II). Addition of a large surplus of catechol (0.0001 to 0.001 M) further ensures that effectively 100% of all copper (II) ions is present in the catechol-complex ion form. After collection the current is measured for the reduction of copper (II) to copper (O) by CVS of the collected film using differential pulse modulation. The detection limit of the technique is below 10 to the minus 10th power M copper (II) for a collection time of 3 minutes, but the sensitivity can be further increased four-fold by collecting for 15 minutes. The sensitivity is reduced by high concentrations of competing trace metals and of surfactants. 10 references, 3 figures, 1 table.},
doi = {10.1080/00032718408065362},
url = {https://www.osti.gov/biblio/6431330}, journal = {Anal. Lett.; (United States)},
number = ,
volume = 17:A19,
place = {United States},
year = {Sun Jan 01 00:00:00 EST 1984},
month = {Sun Jan 01 00:00:00 EST 1984}
}