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Krichevskii parameters of heavy n-alkanes in carbon dioxide: comparison of the results from solubility measurements and from supercritical fluid chromatography
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SYSNO ASEP 0162477 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Ostatní články Title Krichevskii parameters of heavy n-alkanes in carbon dioxide: comparison of the results from solubility measurements and from supercritical fluid chromatography Author(s) Roth, Michal (UIACH-O) RID, ORCID Source Title Fluid Phase Equilibria. - : Elsevier - ISSN 0378-3812
Roč. 212, 1-2 (2003), s. 1-9Number of pages 10 s. Language eng - English Country NL - Netherlands Keywords dilute solution in supercritical solvent ; partial molar volume ; cubic equation of state Subject RIV CF - Physical ; Theoretical Chemistry R&D Projects GA203/02/1093 GA ČR - Czech Science Foundation (CSF) GA203/02/0023 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z4031919 - UIACH-O Annotation Thermodynamic properties of dilute binary mixtures near the solventŽs critical point are largely governed by the Krichevskii parameter. In binary mixtures of components of comparable volatilities, the Krichevskii parameter can be determined from exact relationships connecting it to the initial slopes of the critical line. In highly asymmetric mixtures such as those encountered in supercritical fluid extraction, the exact procedure is usually not feasible, and the Krichevskii parameter has to be estimated from other properties employing a suitable thermodynamic model. In this contribution, the Krichevskii parameters of C21 to C40 n-alkanes in carbon dioxide are derived from retention data of the n-alkanes in supercritical fluid chromatography (SFC), and the results are compared to the literature values obtained from solubility data. Workplace Institute of Analytical Chemistry Contact Iveta Drobníková, drobnikova@iach.cz, Tel.: 532 290 234 Year of Publishing 2004
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