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Determination of the activity coefficient of a volatile component in a binary system by gas‐liquid chromatography
Author(s) -
Chueh Chun F.,
Ziegler Waldemar T.
Publication year - 1965
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690110327
Subject(s) - activity coefficient , chemistry , chromatography , dilution , diethylene glycol , benzene , binary number , volume (thermodynamics) , hexane , component (thermodynamics) , gas chromatography , partition coefficient , binary system , thermodynamics , analytical chemistry (journal) , ethylene glycol , organic chemistry , aqueous solution , arithmetic , mathematics , physics
Abstract The gas‐liquid chromatographic (GLC) method of measuring the activity coefficient of the solute in a binary system has been extended from infinite dilution to the finite concentration range. An equation is presented relating the retention volume of the injected solute sample to the equilibrium solute concentration present in the column. This relation permits determination of the activity coefficient of the solute. Based on the experimental results obtained from the study of the two binary systems, benzene in diethylene glycol at 50°, 70°, and 90°C. and n ‐hexane in 1,2,4‐trichlorobenzene at 30°C., the activity coefficients of the solute measured by the GLC method were found to agree within about ±5% with those obtained by the static equilibrium method.