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Adsorption interaction parameter of polyethers in ternary mobile phases: The critical adsorption line
Author(s) -
Cuong Nguyen V.,
Trathnigg Bernd
Publication year - 2010
Publication title -
journal of separation science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.72
H-Index - 102
eISSN - 1615-9314
pISSN - 1615-9306
DOI - 10.1002/jssc.200900689
Subject(s) - ternary operation , adsorption , block (permutation group theory) , copolymer , critical point (mathematics) , polymer , chemical engineering , binary number , materials science , chemistry , line (geometry) , chromatography , thermodynamics , computer science , organic chemistry , physics , mathematics , geometry , arithmetic , engineering , programming language , mathematical analysis
It is shown that in LC of polymers, the interaction parameter in ternary mobile phases can be described by a plane, which is determined by the dependencies in binary mobile phases. Instead of a critical adsorption point, critical conditions are observed along a straight line of composition between the two critical points in binary mobile phases. Consequently, a separation of block copolymers under critical conditions for one block by an adsorption mechanism for the other block can be achieved in ternary mobile phases of different compositions, which allows an adjustment of the retention of the adsorbing block.