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  Home > JCE Print > Journal of Chemical Education > Issues > 1996  > July  >
Laboratory Experiments
Determination of Trace Metal Ion Concentrations in Seawater
Michael N. Quigley
Department of Chemistry and Biochemistry, The Bayer School of Natural and Environmental Sciences, Duquesne University, Pittsburgh, PA 15282

Fredrick Vernon
Department of Chemistry and Applied Chemistry, University of Salford, Salford M5 4WT, UK

Cover
July 1996
Vol. 73 No. 7
p. 671
Abstract
An experimental procedure is described for the pre-concentration of trace metal ions from seawater. The procedure is suitable for senior students in analytical chemistry/instrumental analysis. Hydrated iron (III) oxide is recommended for the coprecipitation of trace transition metal ions from aqueous solution. Chelating ion-exchange with Chelex-100 is similarly recommended. Both techniques have been successfully used here. After leaching the precipitate or desorbing the resin with nitric acid solution, the trace metal ion content of the concentrate is determined using a suitably sensitive analytical technique such as graphite furnace atomic absorption spectrophotometry. The values obtained are used to calculate the concentration of trace metal ions in the seawater.
More Information
*  Citation
 Michael N. Quigley and Fredrick Vernon. J. Chem. Educ. 1996 73 671.
*  Keywords
*  History
 Created:
Last Updated:		 9/23/1999
5/22/2006
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