activated charcoal column chromatography的用法和样例：
- The canister is filled with activated charcoal.
- An adsorptive material, such as activated charcoal.
- Three fractions were obtained by partial hydrolysis of powdery chitin in concentrated hydrochloric acid, followed by chromatography on charcoal column eluted with different concentrations of alcohol.
- The orange skin, the activated charcoal have used, useless!