This question goes to Paul B: Are you talking about chromatography's physical principle?

Question

This question goes to Paul B: Are you talking about chromatography's physical principle?

Answer 1

Yes. Adsorption (sticking) on a surface is usually considered a physical process. Sometimes weak chemical bonds are involved as well, but that does not alter the reasoning.

Actually, the boundary between physical and chemical processes is a little bit fuzzy wen you look real close.

Is that an answer?