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Chemical effects ¡Isomeric transition /95m Tc / Retention / Hot chemistry SummaryThe chemical effects of the isomeric transition of ® sm Tc in a (NH 4 ) 1 "(® 5m^T cCl 6 solid matrix have been studied by solvent extraction and electrophoretic separation methods. A suitable method of calculation of the retention from the measured photopeak intensity of the ground and metastable states has been developed. The retention value found by the extraction method was close to 100% in contrast with that found by electrophoretic separation which was about 77%.

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Nuclear transformation / Isomeric transitions/Technetium/Hot chemistry SummaryThe chemical effects of the isomeric transition of ' 5m Tc have been investigated in potassium and ammonium hexachloro-technetate(IV) in solution and solid matrix. The retention of ,5g Tc in sulphuric solution was found to be close to zero. Change of the acid concentration had no effect. Nor was 3 Μ HQ solution much different. The retentions for the solid matrices were found to be higher than 70%. The unretained 9 5g Tc appeared as cationic, hydrated Tc0 2 , [TcQ 5 (H,0)]' and TcO; species. The last species only amounted to about 1 %.