High performance thin layer chromatography has been used to separate all the platinum metal 8-hydroxyquinolinates on polar stationary phases. The dependence of Rf values on the composition of mobile phases prepared from chloroformtetrahydrofuran or chloroformalcohol mixtures has been investigated. Retention was found to be partially dependent on alcohol chain length in chloroformalcohol systems. The results obtained from TLC are dependent on the method of sample preparation used for the analyte.