Pair-wise interactions by gas chromatography

Dallos, András; Sisak, Attila; Kulcsár, Zita; Kováts, Ervin sz.

doi:10.1016/s0021-9673(00)00908-0

Cited by 17 publications

(3 citation statements)

References 39 publications

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“…This method is consistent with that of Kovµts et al, who suggested the determination of thermodynamic quantities from the molal Henry's law coefficient [6,14,15].…”

Section: Introductionsupporting

confidence: 89%

Solvation enthalpies and heat capacities ofn-alkanes in four polymer phases by capillary gas chromatography

Görgényi¹,

Héberger

2005

J. Sep. Science

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Molar solvation enthalpy (deltasol H(o)298) and molar heat capacity changes (deltasol C(o)p) were determined by gas chromatography for the C6-C12 n-alkanes on four preferred stationary phases (100% polydimethyl siloxane, 50% diphenyl-50% dimethyl polysiloxane, 50% trifluoropropyl methylsiloxane, and polyethylene glycol) in commercial FSOT. Statistical evaluation indicated the temperature independence of deltasol C(o)p in the range 303-393 K. Deltasol H(o)298 depends linearly on the number of carbon atoms in the n-alkanes, but no linearity could be established for deltasol C(o)p of higher homologues on polar columns, which may be due to a more ordered state on the liquid phase. The homologues for which a linear temperature dependence exists demonstrated that deltasol C(o)p is related linearly to the van der Waals volume and the temperature derivative of the density of the stationary phase. The results are consistent with a simple physical explanation at the molecular level.

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“…This method is consistent with that of Kovµts et al, who suggested the determination of thermodynamic quantities from the molal Henry's law coefficient [6,14,15].…”

Section: Introductionsupporting

confidence: 89%

Solvation enthalpies and heat capacities ofn-alkanes in four polymer phases by capillary gas chromatography

Görgényi¹,

Héberger

2005

J. Sep. Science

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“…A modified Packard (Delft, The Netherlands) model 439 gas chromatograph equipped by thermal conductivity detectors, using helium 5.0 as carrier gas, was applied for the determination of absolute retention data of fragrances on cotton. The cotton fibres were filled into the a column (Pyrex glass tube, 3 mm I.D., 6 mm O.D.…”

Section: Methodsmentioning

confidence: 99%

Surface characterization of standard cotton fibres and determination of adsorption isotherms of fragrances by IGC

Kondor

Quellet

Dallos

2015

Surface & Interface Analysis

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The surface characterizations of the WFK16000 standard cotton by dispersive, specific and total surface energy heterogeneity profiles with surface energy distributions and acid–base properties determined by surface energy analyser are presented in this work. The Dorris–Gray and Schultz methods for the determination of the dispersive surface energy component are compared, and their critical analysis is given. It is concluded that the Dorris–Gray method is more applicable at elevated temperature. Furthermore, Henry's coefficient, standard free enthalpy, enthalpy and entropy data at infinite dilution and adsorption isotherms for some fragrances (benzyl acetate, Cyclal C, diphenyl oxide, eucalyptol, linalool and viridine) measured on dry cotton fibres by inverse gas chromatography at various temperatures are given. The temperature‐dependent form of the Langmuir equation has been fitted to the multiple temperature adsorption isotherms with good agreement. Copyright © 2015 John Wiley & Sons, Ltd.

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“…of adamantane derivatives under the GLC conditions are scarce. [26][27][28][29] They are important for understanding of the mechanism of chromatographic retention and for studying the character of intermolecular sorbate-sorbent interactions. In addition, they can help to establish a relationship between the retention parame ters and specific features of the molecular structure and the physicochemical properties of sorbate molecules, which are manifested during adsorption.…”

mentioning

confidence: 99%

Equilibrium parameters of a liquid—vapor system and thermodynamic characteristics of adsorption of cyclic and cage hydrocarbons in squalane

Yashkin

2010

Russ Chem Bull

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The thermodynamic characteristics of adsorption of adamantane molecules and its alkyl derivatives, as well as some mono and bicyclic hydrocarbons С 10 H n , were studied by equilibri um gas liquid chromatography on a column packed with the stationary liquid phase squalane under the conditions of infinitely low concentrations of the sorbate in the gas phase. The influence of specific features of the molecular structure of sorbates on the regularities of their retention on the column with squalane was shown. For the first time we obtained the limiting activity coefficients and excess thermodynamic functions of mixing, which made it possible to study in detail the thermodynamics of dissolution of cage molecules in the nonpolar liquid bulk. The changes in the molar isobaric heat capacity of sorbates during adsorption were determined by the chromatographic method. For reference compounds, these values agree well with the results of direct calorimetric measurements of the change in the molar standard isobaric heat capacity during vaporization.Modern gas chromatography (GC) is a universal method for physicochemical investigation of various adsorption processes. Potentialities of the GC method make it possi ble to obtain reliable thermodynamic information on the parameters of the vapor-condensed phase equilibrium during both adsorption on various interfaces (gas adsorp tion (GAC) 1 and gas liquid solid phase chromatography (GLSC) 2 ) and formation of dilute solutions involving mol ecules of nonelectrolytes, mesogens, and ionic liquids (gas liquid chromatography (GLC)). 3-5 The theoretical inter pretation of thermodynamic values obtained by the GC method has been actively pursued 6 ; GC is used for studies of the thermodynamics of phase equilibria and intermo lecular interactions in adsorption systems and in solu tions, as well as in analysis of nano and supramolecular systems. 7 The main data on the limiting activity coeffi cients and liquid-vapor partition constant in dilute so lutions of nonelectrolytes were obtained by the GLC method 8 ; GLC is widely used for the determination of the saturation vapor pressure, boiling point, enthalpy of va porization, diffusion coefficients, and other physicochem ical characteristics. 3 Most of published works on the application of GL for studying the physicochemical properties of adamantane and its derivatives deal with the determination of normal boiling points 9-14 ; the GC method was used to determine the equilibrium values of the saturation vapor pressure 15,16 for molecules of unsubstituted adamantane and other that sublimate easily compounds (cubane, naphthalene, cam phor, etc.). The thermodynamic parameters of the solid state-vapor equilibrium for molecules of adamantane and some its oxygen containing derivatives were studied by GC. 15,17 Available data on chromatographic retention of adamantane and its derivatives mainly concern logarith mic retention indices of stationary liquid phases (SLP). 18-25 Data on the thermodynamic characteristics of adsorption (TCA) (adsorption eq...

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Pair-wise interactions by gas chromatography

Cited by 17 publications

References 39 publications

Solvation enthalpies and heat capacities ofn-alkanes in four polymer phases by capillary gas chromatography

Solvation enthalpies and heat capacities ofn-alkanes in four polymer phases by capillary gas chromatography

Surface characterization of standard cotton fibres and determination of adsorption isotherms of fragrances by IGC

Equilibrium parameters of a liquid—vapor system and thermodynamic characteristics of adsorption of cyclic and cage hydrocarbons in squalane

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