... in different usages, such as for Column-layer Chromatography, thin-layer Chromatography,air drying, catalyst carrier, liquid drying,etc. ... for refining petroleum and pharmaceutical industry.11) Silica gel for thin layer Chromatography: Used for analysis and separation of various ... also applied to aluminum, glass, or plastic sheets for thin layer chromatography. c.Cat litterSilica gel is also used as ...