Abstrait

Modification on radiochemical procedure used for determination of uraniumisotopes by alpha spectrometry in some streamsediment samples

Gamal Eldin M.Attia, Osman A.Desouky, Hesham A.Elnahas, Eman M.Ibrahim, Nevin S.Elsayed

The present study aims to make modification on radiochemical procedure used for U-isotopes determination at Nuclear MaterialsAuthority (NMA). A radiochemical technique for analysis of U-isotopes was carried out for stream sediment sample collected fromWadi El-Reddah and also for reference soil sample of InternationalAtomic EnergyAgency (IAEA). The uranium was extracted from the matrix elements with trioctylphosphine oxide (TOPO) and Di-2-ethylhexylphosphoric acid (D2EHPA) and stripped with 0.75MNa2CO3 solution.Modificationswere performed for the procedure to give highest extraction. The obtained result ofmodified technique for a soil reference sample gave a greatly similar result to those obtained by the á- spectrometry method of IAEA for analysis of U-isotopes.