What criterion is followed for the selectrion of the stationary phase in chromatography?

Explanation

In chromatography, particularly in adsorption chromatography, the stationary phase is the adsorbent. It should fulfil certain criteria for better results.
(i) It should have high but selective adsorption power.
(ii) The particles should be spherical in shape and of uniform size.
(iii) The adsorbent should not react chemically with the solvents used for elution or with the components of the mixture under ivestigation.
(iv) The adsorbent should contain as small amount of the soluble components as possible.
(v) The adsorbent should be catalytically inactive and must have a neutral surface.
(vi) The adsorbent should be easily available.
(vii) The adsorbent should be perfectly white.