Eli Grushka1 and V.
Measurements of Gaseous Diffusion
Maynard
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SUNY at Buffalo Buffalo, New York 14214
Coefficients by Gas Chromatography
Gas chromatography, in addition to being a well-established separation tool, is increasingly being used to obtain thermodynamic (/), kinetic (2), and kinetic-molecular information (8). In this paper we would like to describe an instrumental analysis or physical chemistry experiment involving the measurement of the diffusion coefficient, D, of a binary gaseous mixture. This experiment is attractive since, in addition to the measurement of diffusion coefficients, it familiarizes the students with simple chromatographic theory and the nature of flow profiles. In chromatography, the width of the peak, as signified by its variance a2, relative to the distance migrated, L, is an important quantity, designated by II, since it describes the efficiency of the system (4). H
In practice H
=
