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On the computational approach to immobilized pH gradients
Author(s) -
Celentano Fabrizio C.,
Gianazza Elisabetta,
Righetti Pier Giorgio
Publication year - 1991
Publication title -
electrophoresis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.666
H-Index - 158
eISSN - 1522-2683
pISSN - 0173-0835
DOI - 10.1002/elps.1150121003
Subject(s) - computer science , range (aeronautics) , function (biology) , biological system , power (physics) , chemistry , algorithm , materials science , physics , thermodynamics , evolutionary biology , composite material , biology
The unified treatment for computing the pH of complex mixtures of mono‐ and polyprotic buffers, including ampholytes, as utilized in the gradient simulation program PGS, is presented. Its ability to compute pH, buffering power and ionic strength is shown by discussing a few simulations. The problems arising in the automatic formulation of optimal mixtures are presented, as well as the merits and limits of several target functions utilized in such optimizations. It is shown that no universal target function exists and that a proper optimization method should account for the fact that more than one formulation is possible for a given pH range.