Plate Theory and Extensions - Temperature Changes During the Passage of a Solute Through a Theoretical Plate in Gas Chromatography > Page 80

To derive the plate-temperature equation the following assumptions will be made.

1. The flow of gas through the plate is constant.

2. The temperature of the plate surroundings is constant.

3. The concentration of solute is maintained at levels where the

    adsorption isotherm is linear (i.e., Xl(n) = KXg(n)).

4. The heat capacity of the gas is small compared with those of the stationary phase and the support.

              

Figure 21. The Last Theoretical Plate in a GLC Column