Method for the determination of Fe-55 and Ni-63 in solid and liquid samples

摘要

The invention relates to a method for the determination of Fe-55 and Ni-63. In step a) the addition of HCl to the sample takes place, whereby chloro complexes are formed. In step b), extraction takes place in a polar organic solvent. In step c) there is thus obtained an aqueous phase containing Ni-63 and an organic Fe-55-containing phase. According to step d), a back-extraction with a mineral acid (eg HNO 3, H 2 SO 4) is carried out. Here is any common mineral acid suitable, except for HCl. After addition according to step e) of scintillator cocktail to the product of the treated aqueous or organic phase e) described according to a) to d), the determination of the activity of the beta emitter in the liquid scintillation spectrometer (LSC) is carried out in step f).