Direct determination of uranium in water by cathodic stripping voltammetry

Journal Article · Sun Mar 15 04:00:00 EST 1987 · Anal. Chem.; (United States)

DOI:https://doi.org/10.1021/ac00133a030· OSTI ID:6559840

van den Berg, C M.G.; Nimmo, M

Uranium was determined in fresh water and seawater by using 8-hydroxyquinoline(oxine) as the chelating agent in cathodic stripping voltammetry procedure. The peak height-uranium concentration relationship was linear up to about 30 nM U (at a peak current of 80 nA) when the scans were preceded by 1 min of stirred adsorption. The linear range is extended to higher uranium levels by reducing the sensitivity by adsorbing less complex ions on the electrode, i.e., by using a shorter adsorption time, or by adsorbing without stirring. The sensitivity for uranium in a synthetic electrolyte solution was about 10% greater than in seawater, presumably due to the absence of carbonate ions which compete with the oxine for uranyl ions and the major cations which partially saturate oxine in seawater. This similar sensitivity in fresh and seawater is in contrast to the poor sensitivity that was obtained by SCS when using catechol as the chelating compound in fresh water conditions, as its sensitivity was 10-20% of that in seawater.

• Research Organization: Univ. of Liverpool, England
• OSTI ID: 6559840
• Journal Information: Anal. Chem.; (United States), Journal Name: Anal. Chem.; (United States) Vol. 59:6; ISSN ANCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102* -- Chemical & Spectral Procedures
520200 -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ACTINIDES
CATHODES
CHEMICAL ANALYSIS
CHEMISTRY
DATA
ELECTROCHEMISTRY
ELECTRODES
ELEMENTS
EXPERIMENTAL DATA
HYDROGEN COMPOUNDS
INFORMATION
METALS
NUMERICAL DATA
OXYGEN COMPOUNDS
PH VALUE
QUANTITATIVE CHEMICAL ANALYSIS
SEAWATER
URANIUM
VOLTAMETRY
WATER