title: Sequential separation of Fe and Sr from liquid samples by using Sr resin and rapid determination of ⁵⁵Fe and (⁸⁹,⁹⁰)Sr.
abstract: The obtained results showed that the Sr resin can be used for the chromatographic separation of Fe (III) and Sr (II) ions by using a mixture of HCl and HNO3. It was shown that the binding strength of Fe (III) decreases with increasing concentration of HNO3 while the binding strength of Sr (II) increases. It was found that the optimal bonding strength is achieved in 6 mol/L HCl:3 mol/L HNO3 and varying concentrations of acid in the mixture allow their selective separation. On basis of these results, a method for the separation of (55)Fe and (89,90)Sr from liquid samples which consists of binding of Fe and Sr on Sr resin and separation from a number of elements by 6 mol/L HCl:3 mol/L HNO3 and their mutual separation by eluting of Sr with 4 mol/L HCl is established. The method enables efficient simultaneous separation (with high recovery) of (89,90)Sr and (55)Fe and in combination with Čerenkov counting rapid determination of (89,90)Sr.
authors.affiliation: Ruđer Bošković Institute, Bijenička 54, 10000 Zagreb, Croatia. zgrahek@irb.hr
authors.forename: Zeljko
authors.initials: Z
authors.lastname: Grahek
authors.forename: Ivana
authors.initials: I
authors.lastname: Milanović
authors.forename: Marijana
authors.initials: M
authors.lastname: Nodilo
authors.forename: Martina
authors.initials: M
authors.lastname: Rožmarić
mesh_terms: D000042:Absorption; D000180:Acrylic Resins / Q000737:chemistry; D005591:Chemical Fractionation / Q000379:methods*; D006851:Hydrochloric Acid / Q000737:chemistry; D007501:Iron / Q000302:isolation & purification; D007504:Iron Radioisotopes / Q000032:analysis*; D017942:Nitric Acid / Q000737:chemistry; D011829:Radiation Dosage; D011874:Radiometry / Q000379:methods*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D012996:Solutions / Q000737:chemistry*; D013048:Specimen Handling / Q000379:methods; D013324:Strontium / Q000302:isolation & purification; D013326:Strontium Radioisotopes / Q000032:analysis*; D014462:Ultrafiltration / Q000379:methods*
chemical_list: D000180:Acrylic Resins; D007504:Iron Radioisotopes; D012996:Solutions; D013326:Strontium Radioisotopes; D017942:Nitric Acid; D007501:Iron; D006851:Hydrochloric Acid; D013324:Strontium
keywords: (55)Fe; (55)Fe and (89,90)Sr determination; (89,90)Sr; Fe and Sr separation; Sr resin