Fig. 2From: Gamma counting protocols for the accurate quantification of 225Ac and 213Bi without the need for a secular equilibrium between parent and gamma-emitting daughterSchematic representation of the migration of radiolabeled compounds in the iTLC strip. Upon exposure of the strip to the mobile phase, unbound radionuclides will remain in the spotting site, whereas bound radionuclides will move with the solvent front to the upper part of the iTLC stripBack to article page