Determination of the complex formation constants for some water-soluble polymers with trivalent metal ions by differential pulse polarography

被引：0
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作者：
Tuncer Çaykara
Recai İnam
Zülfiye Öztürk
Olgun Güven
机构：
[1] Gazi University,Department of Chemistry, Faculty of Art and Science
[2] Hacettepe University,Department of Chemistry
来源：
Colloid and Polymer Science | 2004年 / 282卷
关键词：
Trivalent metal ions; Water-soluble polymers; Complex formation constant; Differential pulse polarography;
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摘要：
The formation of metal complexes between water-soluble polymers, poly(vinyl alcohol) [PVA], poly(N-vinylpyrrolidone) [PVP], poly(acrylamide) [PAAm] and poly(ethylene oxide) [PEO] with trivalent metal ions, Fe3+, Cr3+, and V3+ were studied by using differential pulse polarography (DPP). The general experimental observation is the shift of totally reversible reduction peaks (M3++Hg+e−⇌M2++Hg) towards more negative potentials when the complexing water-soluble polymers are added to the solution of trivalent metal ions. The negative shift in potential permitted the determination of complex formation constants (Kf) between trivalent metal ions and water soluble polymers. The complex formation constants for Fe3+, Cr3+, and V3+ ions with these polymers increased in the order of V3+>Cr3+>Fe3+.
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页码：1282 / 1285
页数：3
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