to compare the extraction behaviour of hexane , toluene , chloroform , 1,2-dichloroethane , diethylether , ethyl acetate and acetone towards phenobarbital , phenytoin , primidone and carbamazepine , partition coefficients of these drugs between the above solvents and water ( saturated with ammonium sulphate when working with acetone ) were measured at different ph-conditions .
C0031412
phenobarbital
C0033148
primidone