1. Place 120 mg (1.27 mmol) of phenol in a 5-mL conical bottom flask, Flask No.1.
: Phenol is toxic and will cause burns to skin.
2. Add 2.5 mL of dichloromethane and swirl the mixture gently to dissolve all solid.
: Dichloromethane is flammable and toxic. Keep flame away and avoid breathing fumes.
3. Gently add 0.87 g of nitrated silica gel (10.6% HNO3 w/w) and occasionally swirl
for total 5 minutes.
4. Filter the solution using a Pasteur filter-tip pipette method. (Wrap the Pasteur pipette tip
with a small piece of cotton wool. Immerse the pipette into the solution until the pipette tip reaches
the bottom of the flask while squeezing the rubber bulb. Draw the solution up into the pipette by