SILICA GEL H FOR TLC
The surface of silica gel with the highest concentration of geminal
and associated silanols is favored most for the chromatography of basic compounds because these silanols are less acidic
Silica gel is by far the most widely used adsorbent and remains the dominant stationary phase for TLC.The surface of silica gel with the highest concentration of geminal and associated silanols is favored most for the chromatography of basic compounds because these silanols are less acidic.
Silica and alumina are both polar adsorbents so the more polar components in the mixture to be separated are retained more strongly on the stationary phase and are therefore eluted from the column last.