TY - JOUR
T1 - Headspace gas chromatographic measurements of limiting activity coefficients of eleven alkanes in organic solvents at 25°C. 1
AU - Castells, Cecilia B.
AU - Eikens, David I.
AU - Carr, Peter W.
PY - 2000/3
Y1 - 2000/3
N2 - In the present study we report the infinite dilution activity coefficients (γ∞) of 11 alkanes in 67 organic liquids at 25°C measured by fully automated headspace gas chromatography. This study is part of a more comprehensive one whose main objective is to compare the predictive ability of several semitheoretical models to estimate alkane γ∞ values. To do this it is obviously necessary to collect reliable experimental data spanning a wide range of chemical properties. The solutes include five linear (pentane to nonane), four branched (2-methylpentane, 2,4-dimethylpentane, 2,5-dimethylhexane, 2,3,4-trimethylpentane), and two cyclic (cyclohexane and ethylcyclohexane) alkanes. The solvents include several homologous series: n-alkanes, 1-alkenes, n-alcohols, 2-ketones, nitriles, acetates, and 34 other common volatile and nonvolatile solvents. Several modifications introduced to the previously reported instrumentation and to the quantitation method are discussed. The data presented are the average of at least two independent measurements with a precision better than 5%.
AB - In the present study we report the infinite dilution activity coefficients (γ∞) of 11 alkanes in 67 organic liquids at 25°C measured by fully automated headspace gas chromatography. This study is part of a more comprehensive one whose main objective is to compare the predictive ability of several semitheoretical models to estimate alkane γ∞ values. To do this it is obviously necessary to collect reliable experimental data spanning a wide range of chemical properties. The solutes include five linear (pentane to nonane), four branched (2-methylpentane, 2,4-dimethylpentane, 2,5-dimethylhexane, 2,3,4-trimethylpentane), and two cyclic (cyclohexane and ethylcyclohexane) alkanes. The solvents include several homologous series: n-alkanes, 1-alkenes, n-alcohols, 2-ketones, nitriles, acetates, and 34 other common volatile and nonvolatile solvents. Several modifications introduced to the previously reported instrumentation and to the quantitation method are discussed. The data presented are the average of at least two independent measurements with a precision better than 5%.
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U2 - 10.1021/je990146h
DO - 10.1021/je990146h
M3 - Article
AN - SCOPUS:0033887148
SN - 0021-9568
VL - 45
SP - 369
EP - 375
JO - Journal of Chemical and Engineering Data
JF - Journal of Chemical and Engineering Data
IS - 2
ER -