✦ LIBER ✦

A modified Poisson-Boltzmann treatment of ionic activity in the presence of biopolyelectrolytes

✍ Scribed by Alfred Delville

Book ID: 103023135
Publisher: Elsevier Science
Year: 1984
Tongue: English
Weight: 261 KB
Volume: 105
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(84)80418-2

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✦ Synopsis

Ionic activities (hl'* = Zn2+, CL*+) are calculated for cumplex mixtures of salrs (Nail and MCIz) and pulyelectrolytes (sodium deytmn sulfate) from ;L numerical solution of a modified Poisson-Boltzmann equation accordinK to a cell model. These results compare very well with ehperimental spectrophotometric dererminalions usinng tetramethylmurexide a_~ a dye indicator 1_ The model Kwak et al. [I -31 have measured ionic actlvitres for complex mixtures of salts in the presence of a _ Ei(r) = ei[U(r) -*k(R)] + JCTIIl ri(r), polyelectrolyte by using a spectrophotometric method. Thus, they are able to study interactions of ions with biopolyelectrolytes under phyG.olag%al conditions [3], i.e. at concentratrons where classical electrochem-

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