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The effects of molecular collisions between the mobile phase and the solute in gas–solid chromatography
Author(s) -
Zhang Dali,
Ke Jiajun,
Lu Lizhu
Publication year - 2015
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.201500196
Subject(s) - chemistry , partition coefficient , kinetic energy , partition (number theory) , inlet , phase (matter) , gas chromatography , analytical chemistry (journal) , chromatography , symmetry (geometry) , thermodynamics , physics , organic chemistry , geometry , combinatorics , engineering , mechanical engineering , mathematics , quantum mechanics
In chromatographic processes, molecular collisions between the mobile phase and the solute result in the transfer of kinetic energy. Based on these interactions, the relationship between the gauge pressure of the carrier gas at the column inlet and the partition frequency of the solute is derived; consequently, the relationship between the column temperature and partition frequency can be obtained. These relationships have been experimentally validated. The change in the peak shape described herein has been successfully explained using this relationship: the partition frequency was calculated from the theoretical plate number of a tailing peak. We propose a new mechanism for peak tailing using plate theory, which states that as the number of plates increases, the symmetry of the peak increases.