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Conformation of carboxymethyl amylose in aqueous solutions
Author(s) -
Patel J. R.,
Patel R. D.
Publication year - 1971
Publication title -
biopolymers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.556
H-Index - 125
eISSN - 1097-0282
pISSN - 0006-3525
DOI - 10.1002/bip.360100508
Subject(s) - chemistry , divalent , potentiometric titration , aqueous solution , polyelectrolyte , titration , intrinsic viscosity , random coil , sodium , optical rotation , amylose , inorganic chemistry , polymer , salt (chemistry) , ion , crystallography , organic chemistry , circular dichroism , starch
Intrinsic viscosity and specific optical rotation measurements have been carried out for Carboxymethyl amylose (CMA) solutions in 0.15 M sodium chloride at various pH values. Potentiometric titrations of CMA have been performed at various polymer concentrations as well as in presence of different divalent cations. The amount of divalent cation (Ni +2 ) bound to CMA has been determined by using a new method af analysis based on polyelectrolyte theory. Finally from the results it is shown that CMA may exist as a random coil in solution.