In this research for liquid–liquid extraction chloroform
and dichloromethane were used for comparison. However,
it had been observed that many interfering matrices were
extracted with chloroform than dichloromethane, due to
this dichloromethane was selected for the extraction. Literature
report also indicated that even if both solvents were
useful for decaffeinating caffeine from coffee beans according
to Clarke, (1980), Rofti (1971) the current most widely
used solvent for decaffeinating in coffee beans was dichloromethane. The efficiency of dichloromethane to extract
caffeine from coffee beans is 98–99%.