What are the applications of adsorption in chemical analysis?

Explanation

There are various applications of adsorption in chemical analysis.
Some of which are as follows
(i) In thin layer chromatography The lower adsorbing particles comes out readily while another having higher adsorbing tendency somes out later. On this basis compounds are separated to analysed.
(ii) In adsorption indicators Surface of certain precipitate has an ability to adsorb some dyes to produce a characteristic colour e.g., Agx adsorbs eosin dye and thereby producing a characteristic colour at the end point.
(iii) In qualitative qnalysis Specific adsorption tendency so particular ion can be identified very easily.
(iv) In the separation of inert gases Different inert gases are adsorbed to different extents at different temperatures on coconut charcoal. This forms the basis of their separation from a mixture.