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Thermodynamics of adsorption of gaseous species on the surface of a gas chromatography column is considered using the knowledge of the electronic structure of the adsorbate. Relevant equations based on a model of mobile adsorption are offered to predict the adsorption temperature,  T  ads , of a heavy-element (or its compound) with respect to  T  ads  of its lighter homolog (or the same type of compound). A case of adsorption of OsO 4  and HsO 4  on an inert (quartz or silicon nitride) surface of a chromatography column is taken, as an example. The influence of various properties of the adsorbate, such as molecular weight and size, on  T  ads  is analyzed to show that those factors should not be ignored in intentionally accurate predictions of  T  ads . A comparison of the desorption constants of OsO 4  and HsO 4  obtained with the use of the calculated spectroscopic properties shows that HsO 4  should be significantly more volatile than OsO 4 , mainly due to the entropy factor.

Predictions of adsorption behaviour of the heaviest elements in a comparative study from the electronic structure calculations