Separation of 103Pd from a Rh target using an alloying pretreatment with bismuth
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Tomoyuki Ohya
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Kotaro Nagatsu
Abstract
Palladium-103 is one of the most attractive radionuclides for internal radiotherapy. It is not only used as a brachytherapy seed but is also a feasible candidate for Auger electron therapy and gold-nanoparticle therapy. In this study, we propose a new method for the separation of 103Pd from a rhodium target to obtain no-carrier-added 103Pd. Rhodium powder target was irradiated under the following conditions: proton, 50 MeV, 1–3 μA, 1–4 h for the separation study; and H2 +, 24 MeV, 5 μA, 1 h to produce 103Pd. The irradiated target was pretreated using an alloying reaction between Rh and Bi on a hotplate at 500 °C. Rhodium in the chemical form of a Bi–Rh compound could then be dissolved with nitric acid and 103Pd was extracted using dimethylglyoxime as an extractant. The target rhodium was recycled using sodium tetrahydroborate (NaBH4). We obtained 103Pd with a yield of 87%. The activity of the product was 26 ± 2 MBq at the end of bombardment (EOB), and the radionuclidic purity of 103Pd was greater than 99%. The decontamination factors of rhodium and bismuth in the 103Pd product were estimated to be greater than 104 and 105, respectively. The target rhodium was recycled with a yield of 91% with a trace of bismuth (9 μg/50 mg Rh). The total separation time for 103Pd was within 3.5 h.
Acknowledgments
We would like to thank our cyclotron staff for their excellent operation of the NIRS-AVF-930 cyclotron and the technical support. We also acknowledge the speedy and kindly support of the QST librarians. We thank Sarah Dodds, PhD, from Edanz (https://jp.edanz.com/ac), for editing a draft of this manuscript.
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Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
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Research funding: None declared.
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Conflict of interest statement: The authors declare no conflicts of interest regarding this article.
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© 2022 Walter de Gruyter GmbH, Berlin/Boston
Artikel in diesem Heft
- Frontmatter
- Original Papers
- Unique transport behaviour of Am(III)/Eu(III) ions across a supported liquid membrane containing a TREN-based diglycolamide dendrimer ligand
- A novel CPE procedure by oil-in-water microemulsion for preconcentrating and analyzing thorium and uranium
- Separation of 103Pd from a Rh target using an alloying pretreatment with bismuth
- Experimental and computational study of rafoxanide radioiodination via isotopic exchange reaction
- Preparation, biological evaluation and radiolabeling of [99mTc]-technetium tricarbonyl procainamide as a tracer for heart imaging in mice
- Gamma radiation shielding performance and physico-chemical properties of poly (vinyl alcohol)/Cd(NO3)2 composite films
Artikel in diesem Heft
- Frontmatter
- Original Papers
- Unique transport behaviour of Am(III)/Eu(III) ions across a supported liquid membrane containing a TREN-based diglycolamide dendrimer ligand
- A novel CPE procedure by oil-in-water microemulsion for preconcentrating and analyzing thorium and uranium
- Separation of 103Pd from a Rh target using an alloying pretreatment with bismuth
- Experimental and computational study of rafoxanide radioiodination via isotopic exchange reaction
- Preparation, biological evaluation and radiolabeling of [99mTc]-technetium tricarbonyl procainamide as a tracer for heart imaging in mice
- Gamma radiation shielding performance and physico-chemical properties of poly (vinyl alcohol)/Cd(NO3)2 composite films
