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

被引：23
作者：
Çaykara, T
Inam, R
Öztürk, Z
Güven, O
机构：
[1] Gazi Univ, Fac Art & Sci, Dept Chem, TR-06500 Ankara, Turkey
[2] Hacettepe Univ, Dept Chem, TR-06532 Ankara, Turkey
来源：
COLLOID AND POLYMER SCIENCE | 2004年 / 282卷 / 11期
关键词：
trivalent metal ions; water-soluble polymers; complex formation constant; differential pulse polarography;
D O I：
10.1007/s00396-004-1108-1
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
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(-)reversible arrowM(2+)+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 (K-f) 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：4
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