Abstract A new rapid method has been developed for the determination of Th, Pu, Np, U, Am and Cm isotopes in water samples about 1 L. Actinides are pre-concentrated by co-precipitation with Ca phosphate, sequentially separated on stacked TEVA TK221 cartridges measured alpha spectrometry. The extraction chromatographic resin contains i.e . CMPO DGA extractants. It characterized measuring weight ...