Theory of Headspace: new approach and results

Chromatography Forum: GC Archives: Theory of Headspace: new approach and results
Top of pagePrevious messageNext messageBottom of pageLink to this message  By Yuriy K. Krasnov on Wednesday, October 31, 2001 - 08:49 am:

Dear colleague,
I like to invite all of you on www.physics4u.com to learn about exact solutions of the straight and reverse problems of Gas Chromatography. You will enjoy the new approach described in three articles in free journal "The Scientific Notes", vol. No.1.
With best regards,
Yuriy K. Krasnov, Ph. D.
yuriykrasnov@msn.com


Top of pagePrevious messageNext messageBottom of pageLink to this message  By Yuriy K. Krasnov on Wednesday, October 31, 2001 - 09:10 am:

Let me tell what you will get. There are three articles:
ON THE PHENOMENOLOGY OF EVAPORATION: THE STRAIGHT AND REVERSE PROBLEMS OF STATIC HEADSPACE ANALYSIS.
Yuriy K. Krasnov.
Abstract. The simple formulas describing the results of the usual static headspace analysis and the criteria of completeness of the data of such analysis are obtained. It is shown how the results of usual static headspace analysis can be used to reconstruct the mass, average moles' number, and volume of non-volatile components into the analyzed mixtures.

ON THE PHENOMENOLOGY OF EVAPORATION: KINETIC EQUATION.
Yuriy K. Krasnov.
Abstract. This work offers the approach that serves as an adequate base for the phenomenology of evaporation. The microscopic mechanisms of evaporation at the molecular level are discussed. The fluxes of physical properties from evaporating liquid are described. The basic microscopic quantity - height of surface energy barrier - is connected to experimental data for enthalpy of evaporation and specific internal energy at a constant temperature. The basic phenomenological equation of evaporation kinetics are obtained and solved for all major conditions of evaporation. The applicability of the developed approach to the real liquid systems is discussed.

HOW MUCH HEADSPACE CAN TELL US ABOUT LIQUID?-
Iddel Nehamah.
Abstract. The general expressions for the temperature dependencies of the partial pressures and partition coefficients are obtained on the base of the phenomenological approach to the phenomenon of evaporation described in previous article. Results are connected with well-known experimental data. It is shown that usual headspace analysis due to gas chromatography might be the best experimental method of investigation of molecules' interactions into liquids.
I hope, you will engoy all of them.
Yuriy K. Krasnov


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