title: Determination of organically-associated trace metals in estuarine sea-water by solvent extraction and atomic-absorption spectrometry.
abstract: Chloroform extraction of trace metals (Ni, Cu, Mo, Mn, Cd and Pb) in estuarine sea-water was studied at pH 8 and pH 3, on the basis that the metals would be associated with dissolved organic matter (DOM), which has recently been characterized by reversed-phase liquid chromatography. Ni, Cu, Mo and Mn were extracted more at pH 8 than at pH 3. Cd and Pb were not associated with the DOM at either pH 8 or 3. The percentage of the total dissolved trace metals in sea-water associated with DOM varied from 0 to 14%. The metals extracted into chloroform at pH 8 were assumed to be associated with neutral or weakly basic DOM while at pH 3 they could be associated with either the neutral (or weakly basic) DOM or two types of acidic DOM.
authors.affiliation: Faculty of Integrated Arts and Sciences, Hiroshima University, Hiroshima 730, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Hayase
authors.forename: K
authors.initials: K
authors.lastname: Shitashima
authors.forename: H
authors.initials: H
authors.lastname: Tsubota