An α-spectrometric method for the rapid determination of radium isotopes ( 2 2 3 Ra, 2 2 4 Ra and 2 2 6 Ra) in environmental samples is presented. Using Empore T M Radium Rad Disks complete separation of the target radionuclides is achieved. The high selectivity of these Rad Disks allows the straightforward use of 2 2 5 Ra as yield tracer. Chemical yield is up to 92+/-9%. The chemical procedure can be accomplished within 5h. α-Sources show energy resolution in the range of typically 26-40keV (FWHM). Despite minimal thickness of the sources no significant radon (Rn) losses can be observed.