as per my textbook

Paper chromatography is a kind of partiotion chromatography where stationery phase is water, and I think it should be , because in partiotion chromatography solid is not stationery phase. but as per Wikipedia and this site:http://www.chemguide.co.uk/analysis/chromatography/paper.html

Stationery phase in paper chromatography is paper(a solid) . So which one is correct? Is paper chromatography really a kind of partition chromatography or adsorption chromatography?

The picture is from my textbook: NCERT class 11 ,pg-353


It's a bit of both, actually, and also ion-exchange chromatography. The cellulose and other components of paper do exhibit adsorption and ion exchange properties with some analytes, but as paper chromatography is usually performed, partitioning between the flowing solvent and trapped water is the major mode of separation. Paper chromatography typically uses water-saturated solvents and enclosed chambers where water vapour can keep water trapped in the paper (the paper is equilibrated with this vapour before development). Since cellulose is very hydrophilic, immiscible or poorly miscible solvents are usually used, which keeps the water stuck to the cellulose as it has much higher affinity for water than the solvent.

This is an early paper showing the apparatus used for paper chromatography of amino acids and this book details the theory involved starting on page 4.


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