Adsorción y disolución simultánea de hidrocarburos en columnas de cromatografía gaseosa rellenas con diferentes cargas de 3-metilsydnona sobre Chromosorb P

dc.creatorCastells, Reynaldo César
dc.creatorRomero, Lílian Mónica
dc.creatorNardillo, Ángel Miguel
dc.date1997-08-01
dc.date2021-08-17T16:52:10Z
dc.date.accessioned2023-07-15T02:42:32Z
dc.date.available2023-07-15T02:42:32Z
dc.identifierhttp://sedici.unlp.edu.ar/handle/10915/122750
dc.identifierissn:0021-9797
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/7462977
dc.descriptionAbstract Thermodynamic properties of solution in 3-methylsydnone (3MS) and of adsorption at the nitrogen/3MS interface were gas chromatographically measured for a group of fifteen hydrocarbons at infinite dilution conditions. Retention volumes were measured at five temperatures within the range 37–52°C in six columns containing different loadings of 3MS on Chromosorb P AW. Partition and adsorption coefficients were calculated and from their temperature dependence the corresponding enthalpies were obtained, although with considerable error; infinite dilution activity coefficients of the hydrocarbons in the bulk and in the surface phases demonstrated a strong correlation. Bulk activity coefficients in 3MS were very much smaller than those previously measured for the same solutes in formamide (FA) and in ethyleneglycol (EG), and were also smaller than what could be predicted on account of 3MS cohesive energy density as estimated from the quotient σ/v<sup>1/3</sup>(σ, surface tension;v, molar volume). There was not such a large difference between the surface activity coefficients in the three solvents; furthermore, the quotients (surface activity coefficient/bulk activity coefficient) for a given solute in 3MS were twice as large as in FA and about three times larger than in EG. These results make evident the difficulties inherent in the prediction of surface phase properties from those in the bulk and cast doubts on the pertinency of employing the surface tension to compare cohesive energy densities of polar solvents with important chemical differences.
dc.descriptionFacultad de Ciencias Exactas
dc.formatapplication/pdf
dc.format119-130
dc.languageen
dc.rightshttp://creativecommons.org/licenses/by-nc-sa/4.0/
dc.rightsCreative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.subjectCiencias Exactas
dc.subject3-methylsydnone
dc.subjectadsorption
dc.subjectsolution activity coefficients
dc.subjectsurface activity coefficients
dc.subjectgas chromatography
dc.subjectchromatography thermodynamic
dc.titleConcurrent Solution and Adsorption of Hydrocarbons in Gas Chromatographic Columns Packed with Different Loadings of 3-Methylsydnone on Chromosorb P
dc.titleAdsorción y disolución simultánea de hidrocarburos en columnas de cromatografía gaseosa rellenas con diferentes cargas de 3-metilsydnona sobre Chromosorb P
dc.typeArticulo
dc.typeArticulo


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