The distribution of ibuprofen enantiomers was examined in aqueous methanol solution and 1,2-dichloroethane organic solvent containing a chiral selector hydrophobic L-tartaric ester or D-tartaric ester.The influences of the length of alkyl chain of L-tartaric ester or D-tartaric ester, the concentration of L-tartaric ester,different organic solvents and the concentration of aqueous methanol solution on the partition coefficient(K) and separation factor(α) of ibuprofen, were investigated·L-tartaric ester form...