BSA liposomes were prepared with approximately 100 nm mean particle size under rather gentle experiment conditions,and two-colorimetric coomassie brilliant blue protein was employed to measure the free drug in the entrapped efficiency(EE%) determination of BSA liposomes.Gel filtration was used to measure the EE%,and several Sephadex gels were examined by the separation of liposomes and free drug.To determine the free drug,three methods were compared on two-colorimetric UV spectrophotography,Bradford and two...