ABSTRACT

The applications of the reversed-flow gas chromatographic technique (RFGC) described in Chapters 4 and 5 were all with an empty sampling column. The latter was used for the mere creation of sample peaks by placing the carrier gas stream perpendicular to the diffusion stream in the column L (cf. Fig. 3.1), and reversing the direction of the carrier gas flow from time-to-time. In only one case (see Chapter 4, section II), the sampling column was filled with silica gel to act as a separation material for the components of a gas mixture (cf. Fig. 4.9). In the present chapter, applications with a sampling column containing a solid catalyst (1-6), or a chromatographic material (7-9), or both (9,10) will be examined. The diffusion column will be either absent, or empty of any solid, or partly filled with a catalyst near the junction with the sampling column.