The radioactive kryptonate of silver has been prepared by ion bombardment. Some possibilities of its uses in analytical chemistry are reported. The influence of different solutions on Ag(85Kr) has been studied with respect to the use of kryptonate in the role of an end-point indicator in volumetric determination (determination of Ba2+ with the titrant K2Cr2O7) and in the technique of calibration curves [determination of HCl, Cr2O 72− and V(OH) 4+ ].