METHOD FOR ISOLATION AND PURIFICATION OF YTTRIUM ISOTOPE Russian patent published in 2006 - IPC C01F17/00 G21G4/08 

FIELD: radiochemistry, medicine.

SUBSTANCE: invention relates to method for isolation and purification of multycurie amounts of Y⁹⁰ having satisfactory chemical and radiochemical purity without application of extraction chromatography columns selective to Sr⁹⁰ and with minimal losses of starting Sr⁹⁰ and exhaust flow. Claimed method includes utilization of starting Sr⁹⁰ solution wherein at least 80-90 % strontium represents stable Sr, dissolution of nitrate salt, containing in starting Sr⁹⁰ solution to obtain strontium nitrate solution; acidifying of strontium nitrate solution containing Y⁹⁰ with concentrated nitric acid; evaporation of strontium nitrate solution; followed by filtration or centrifugation of strontium nitrate solution to separate Sr⁹⁰ nitrate crystal salt from solution and to obtain yttrium-enriched supernatant; evaporation of said yttrium-enriched supernatant to dry state; dissolution of nitric acid-free yttrium-enriched supernatant in strong acid; solution passing through selective to yttrium extraction chromatography column in such a manner that essentially total amount of abovementioned yttrium isotope is retained in column, and other metal and admixture traces pass through column and recycled in starting strontium solution; washing of selective to yttrium extraction chromatography column with strong acid to remove total residual Sr⁹⁰ which is recycled in abovementioned starting Sr⁹⁰ solution; and isolation of yttrium isotope from selective to yttrium extraction chromatography column with strong acid. Method of present invention provides Sr⁹⁰ yield of more than 99.9 % and increased Y purity after each cycle. Method is useful in medicine.

EFFECT: method for isolation and purification of yttrium isotope with increased yield and purity.

11 cl, 2 tbl, 2 dwg