NDLI: The fundamentals of vacuum thermochromatography

Content Provider	Springer Nature Link
Author	Zvara, I.
Copyright Year	2010
Abstract	Species of dissimilar volatility (adsorbability) can be separated by a technique, which resembles the common gas–solid thermochromatography but is performed in evacuated columns. The negative longitudinal temperature gradient gives rise to an effective convectionless molecular flow and the gradually slower migration of the analyte results in a deposit within individual temperature range. The technique can serve some specific needs of separation of very small amounts of radiolabeled molecular entities (even single atoms). It also allows evaluation of desorption energies of such molecules from surfaces on the basis of a proper theory of the separation processes. The paper provides correct prescriptions for the Monte Carlo simulations of the migration of molecules in columns and of the deposit profiles, which are yet lacking. Numerous performed simulations give better understanding of influence of various experimental parameters on the data. Possibility, as well as limitation, of using the diffusion ansatz of the random flights for evaluation of desorption energies is discussed.
Starting Page	597
Ending Page	602
Page Count	6
File Format	PDF
ISSN	02365731
Journal	Journal of Radioanalytical and Nuclear Chemistry
Volume Number	286
Issue Number	3
e-ISSN	15882780
Language	English
Publisher	Springer Netherlands
Publisher Date	2010-08-19
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Vacuum thermochromatography Heavy elements Adsorption Desorption energy Monte Carlo simulation Inorganic Chemistry Diagnostic Radiology Nuclear Physics, Heavy Ions, Hadrons Physical Chemistry Nuclear Chemistry
Content Type	Text
Resource Type	Article
Subject	Spectroscopy Pollution Health, Toxicology and Mutagenesis Radiology, Nuclear Medicine and Imaging Analytical Chemistry Public Health, Environmental and Occupational Health Nuclear Energy and Engineering

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