The Lower Sixth chemists spent an afternoon in the under-graduate laboratories at the University of Bristol extracting caffeine from tea. They started with tea bags boiling in water to make a strong cuppa and then extracted the caffeine into an organic solvent. The solvent was separated, dried and removed using a rotary evaporator leaving the caffeine as a white solid on the inside of the flask. An infra-red spectrum and melting point determination then confirmed that the product was indeed caffeine.
This annual trip gives an excellent insight into university study and broadens the students experience of practical chemistry.
Head of Science Faculty