Caffeine is a member of the class of natural products called Alkaloids. It is isolated by hot continuous extraction (Soxhlet extraction) . It is good method of extraction, doing complete extraction in minimum amount of solvent. After extraction the quntification of caffeine are done by either HPLC or electroanalytical methods i.e. UV/Visible spectrophotometer or now a days due to more advantages , prefer GC-MC.