ABSTRACT
The simplest conceivable case of reversed-flow gas chromatography (RFGC) is to have the sections 1' and 1 shown in Fig. 3.1 entirely empty of any chromatographic material, the rate process at x = 1' being the slow diffusion of a gaseous solute A into the 114carrier gas B from the diffusion column L connected perpendicularly to column 1' + 1 at x = 1'. It permits the measurement of the mutual diffusion coefficient of A and B, this being an appropriate rate coefficient for the process (1). The component B enters at D2 and meets the detector at D1, or vice versa, flowing continuously through the sampling column 1' + 1, and filling also the diffusion column L, At the closed end of the latter the solute A is introduced (by means of a syringe) as a gas or vapor in the form of a small volume pulse or a bigger volume so that it fills a considerable part or even the entire length, L.
