001021171 001__ 1021171 001021171 005__ 20250204113751.0 001021171 0247_ $$2doi$$a10.1007/s10967-023-09270-z 001021171 0247_ $$2ISSN$$a0022-4081 001021171 0247_ $$2ISSN$$a0236-5731 001021171 0247_ $$2ISSN$$a0134-0719 001021171 0247_ $$2ISSN$$a1417-2097 001021171 0247_ $$2ISSN$$a1588-2780 001021171 0247_ $$2ISSN$$a2064-2857 001021171 0247_ $$2datacite_doi$$a10.34734/FZJ-2024-00617 001021171 0247_ $$2WOS$$aWOS:001136343800005 001021171 037__ $$aFZJ-2024-00617 001021171 082__ $$a540 001021171 1001_ $$0P:(DE-Juel1)186668$$aStrecker, J.$$b0$$eCorresponding author$$ufzj 001021171 245__ $$aRadiochemical isolation of 45Ti using ion chromatography 001021171 260__ $$aDordrecht [u.a.]$$bSpringer Science + Business Media B.V.$$c2024 001021171 3367_ $$2DRIVER$$aarticle 001021171 3367_ $$2DataCite$$aOutput Types/Journal article 001021171 3367_ $$0PUB:(DE-HGF)16$$2PUB:(DE-HGF)$$aJournal Article$$bjournal$$mjournal$$s1724682812_6510 001021171 3367_ $$2BibTeX$$aARTICLE 001021171 3367_ $$2ORCID$$aJOURNAL_ARTICLE 001021171 3367_ $$00$$2EndNote$$aJournal Article 001021171 520__ $$a45Ti exhibits favorable decay properties for positron emission tomography (PET) imaging and can be easily produced bythe bombardment of natural scandium (Sc) by protons using the 45Sc(p,n)45Ti nuclear reaction. However, separation of45Ti from irradiated Sc targets is arduous due to the hydrolytic instability of Ti(IV) complexes, making it a significant bottleneckfor routine application of this radionuclide. In the present work, we describe the development and optimization ofan ion chromatographic separation method based on trapping of 45Ti on a hydroxamate-functionalized chelating resin andsubsequent elution with oxalic acid at pH = 2.8. Under optimized conditions, this method enabled 45Ti-recovery of 61 ± 8%within 7 min. Sc contamination in scaled-up experiments was found to be only 3.0 ± 1.8 μg/mL. The resulting 45Ti-solutionwas directly used for complexation with CDTA as a model chelator, affording the corresponding [45Ti]Ti(cdta) complex witha radiochemical conversion of 73 ± 3%. 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