Determination of the isoelectric points of several metals by an adhesion method

An adhesion method for the determination of the isoelectric point (iep) of metals (including Mo, Pt, Te, Si, Sn, Cr, cobalt, and Ni) in aqueous media is described. The procedure consists of measuring the rate of the uptake of charged latex particles on metal beads as a function of the pH. The iep of...

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Bibliographic Details
Published in:Journal of physical chemistry (1952) 1991-09, Vol.95 (18), p.7028-7032
Main Authors: Kallay, N, Torbic, Z, Golic, M, Matijevic, Egon
Format: Article
Language:English
Subjects:
Chemistry
Exact sciences and technology
General and physical chemistry
Solid-liquid interface
Surface physical chemistry
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Summary:An adhesion method for the determination of the isoelectric point (iep) of metals (including Mo, Pt, Te, Si, Sn, Cr, cobalt, and Ni) in aqueous media is described. The procedure consists of measuring the rate of the uptake of charged latex particles on metal beads as a function of the pH. The iep of different metals are well correlated with those of corresponding metal (hydr)oxides but not with their points of zero charge or redox potentials. This result shows that the surface of different metals are coated with (hydrous) oxide layers, which are responsible for their surface charge. Graphs. 47 ref.--AA
ISSN:0022-3654
1541-5740
DOI:10.1021/j100171a056