Abstract
Scintillation counting of tritiated ligands is widespread in receptor assays and has necessitated the use of scintillation cocktails containing environmentally damaging solvents that pose health hazards to their users. A safer mode of dry scintillation counting, based on the solid scintillator Xtalscint, was evaluated in whole-cell and membrane receptor assays. The results compared favorably with those obtained with glass-fiber filters and conventional liquid counting methods. It is concluded that solid scintillators may be used as an environmentally safer alternative to liquid scintillation in these assays.