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Voltammetric study of some macromolecule ‐ metal complexes
Author(s) -
Esteban M.,
DíazCruz J. M.,
Ariño C.,
Casassas E.
Publication year - 1992
Publication title -
makromolekulare chemie. macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 0258-0322
DOI - 10.1002/masy.19920590124
Subject(s) - polarography , chemistry , voltammetry , macromolecule , metal , diffusion , anodic stripping voltammetry , polyacrylic acid , stripping (fiber) , metal ions in aqueous solution , pulse (music) , analytical chemistry (journal) , inorganic chemistry , electrochemistry , polymer , electrode , materials science , chromatography , thermodynamics , organic chemistry , biochemistry , physics , electrical engineering , composite material , detector , engineering
The usefulness of a voltammetric model for studying macromolecule ‐ metal complex systems is verified. Complexes formed by a metal ion (Zn(II), Cd(II), Pb(II) or Cu(II)) and a macromolecule (polymethacrylic (PMA), polyacrylic (PAA), alginic (AA) or polygalacturonic (PGA) acids) are investigated. Several voltammetric techniques have been used: sampled direct current polarography (DCP), normal pulse polarography (NPP), differential pulse polarography (DPP), reverse pulse polarography (RPP), cyclic voltammetry (CV) and differential pulse anodic stripping voltammetry (DPASV). Results confirm the validity of the model, in determining not only formation constants but also diffusion coefficients of the complexes. The behaviour of some systems agrees with that predicted by the model. Nonetheless, other systems only partially fulfil the predictions for different reasons, which are discussed.