What are the applications of adsorption in chemical analysis?

(N/A) $(i)$ Chromatography: Thin layer chromatography $(TLC)$ works on the principle of adsorption. It is used for the separation of coloured components.
$(ii)$ Adsorption indicators: Precipitates of silver halides $(AgX)$ act as adsorbents. They have the property to adsorb dyes such as eosin and fluorescein,thereby producing a characteristic colour at the end point of a titration.
$(iii)$ Separation of inert gases: Due to the difference in the degree of adsorption of gases by charcoal,a mixture of noble gases can be separated by adsorption on coconut charcoal at different temperatures.