Is longitudinal diffusion of the solute a more serious problem in gas or in liquid chromatography?

gas chromatography

Explanation:

Not all molecules of the same solute flow in the same way at the same time, that is, they do not exhibit an ideal behavior. This non-ideal behavior is due to three factors:

1. swirl diffusion.

2. longitudinal diffusion.

3. Resistance to the transfer of matter.

Longitudinal diffusion

This is a more important term in gas chromatography because the diffusion coefficient is much larger in gases than in liquids. The solute molecules move in different directions in the stationary phase due to the porosity of the particles that form it. This causes some solute molecules to leave the spine behind the majority.