[en] Rapid chemical separations as a useful tool in the study of short-lived nuclides are discussed. Advantages of such techniques are: selectivity, sensitivity, confirmation of atomic number. Continuous or discontinuous performance of a separation procedure is considered. As long as a relatively small number of experiments give the desired information, discontinuous procedures are appropriate. When too many runs have to be summed up, a continuous system delivering ''on-line'' a study source of short-lived activity is superior. Group separations have been worked out based on the expected formation of strong complexes between bromide ions and superheavy elements which can be separated on ion exchange columns