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Walther M, Preusche S, Bartel S, Wunderlich G, Freudenberg R, Steinbach J, Pietzsch HJ. Theranostic mercury: 197(m) Hg with high specific activity for imaging and therapy. Appl Radiat Isot 2015; 97:177-181. [DOI: 10.1016/j.apradiso.2015.01.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2014] [Revised: 11/12/2014] [Accepted: 01/04/2015] [Indexed: 10/24/2022]
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Dutta B, Maiti M, Lahiri S. Production and separation of no-carrier-added thallium isotopes from proton irradiated (nat)Hg₂Cl₂ matrix. Appl Radiat Isot 2011; 69:1337-42. [PMID: 21646027 DOI: 10.1016/j.apradiso.2011.05.016] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2010] [Revised: 04/04/2011] [Accepted: 05/11/2011] [Indexed: 10/18/2022]
Abstract
For the first time, (nat)Hg₂Cl₂ target has been used to produce no-carrier-added-NCA (197,198,198m,199,200,201)Tl radionuclides using (nat)Hg(p,xn) reaction. Liquid-liquid extraction technique was employed in order to separate radiothallium from the bulk mercury matrix using liquid anion exchanger trioctylamine (TOA) dissolved in cyclohexane. In order to verify the presence of stable Hg in Tl fraction, the entire process was repeated with stable salts of Hg and Tl and the extent of separation was examined by Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES). High separation factors were observed both by radiometric and ICP-OES technique when 0.1 M HNO³ and 0.1M TOA were used as aqueous and organic phase, respectively. The Hg contamination was less than 0.3 ppm in the aqueous phase containing Tl after three times of extraction at the optimal condition.
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Affiliation(s)
- Binita Dutta
- Chemical Sciences Division, Saha Institute of Nuclear Physics, 1/AF Bidhannagar, Kolkata 700064, India
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Thin-target excitation functions: a powerful tool for optimising yield, specific activity and radionuclidic purity of accelerator-produced radionuclides. ACTA ACUST UNITED AC 2003. [DOI: 10.1007/s10582-003-0051-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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4
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Bonardi M, Birattari C, Groppi F, Sabbioni E. Thin-target excitation functions, cross-sections and optimised thick-target yields for natMo(p,xn)(94g ,95m,95g,96(m + g))Tc nuclear reactions induced by protons from threshold up to 44 MeV. No Carrier Added radiochemical separation and quality control. Appl Radiat Isot 2002; 57:617-35. [PMID: 12433035 DOI: 10.1016/s0969-8043(02)00176-8] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
This work describes the method adopted in our laboratories, to produce 94gTc, 95gTc, 95mTc and 96gTc radionuclides via proton-cyclotron irradiation on molybdenum targets of natural isotopic composition. A new set of experimental thin-target excitation functions and "effective" cross-sections for direct natMo(p,xn)(A)Tc [with A = 94, 95, 95, 96] nuclear reactions, with incident proton energy in the range from threshold up to 44 MeV is presented. Some definitions of the equations used and nuclear data traceability are reported. Thick-target yield values were calculated and optimised, by numerical fitting and integration of the measured excitation functions. These values allow optimisation of production yield of one radionuclide, minimising at the same time the yield of the others. Radiochemical separation on NCA technetium radionuclides from both molybdenum target and niobium, zirconium and yttrium radioactive by-products is reported. Quality control tests of the radiotracers were developed for the applications envisaged in environmental metallo-biochemical toxicology.
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Affiliation(s)
- Mauro Bonardi
- Radiochemistry Laboratory, Accelerators and Applied Superconductivity Laboratory, Università degli Studi and National Institute of Nuclear Physics, INFN-Milano, Segrate, Italy.
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Bonardi M, Groppi F, Birattari C. A rapid improved method for gamma-spectrometric determination of 202Tl impurities in [201Tl]-labelled radiopharmaceuticals. Appl Radiat Isot 2002; 57:647-55. [PMID: 12433038 DOI: 10.1016/s0969-8043(02)00179-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Despite the cyclotron production method and the efficiency of the radiochemical procedures adopted, the long-lived radio-isotopic impurity 202Tl is always present in [201Tl]-labelled radio-pharmaceuticals, together with other short-lived impurities like, 200Tl. Rapid determination of the 202Tl impurity, can be achieved using HPGe gamma spectrometry and a detector shielded by a 5 mm thick envelope of lead. In this way, dead-time correction errors, Compton and X-ray background, are very efficiently avoided and suppressed. The same method could be applied routinely in nuclear medicine, to determine the radioisotopic purity of 201Tl by means of an ionisation chamber dose calibrator.
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Affiliation(s)
- Mauro Bonardi
- Radiochemistry Laboratory, Accelerators and Applied Superconductivity Laboratory, Università degli Studi and National Institute of Nuclear Physics, INFN-Milano, Segrate, Italy.
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Groppi F, Birattari C, Bonardi M, Gini L. High resolution γ-spectrometry by HPGe detector and β-spectrometry by liquid scintillation counting, hyphenated to elemental analysis techniques: applications of high specific activity radio-nuclides for ultra-trace metallo-toxicological and environmental studies. Microchem J 2002. [DOI: 10.1016/s0026-265x(02)00065-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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High specific activity radioactive tracers: a powerful tool for studying very low level and long term exposure to different chemical forms of both essential and toxic elements. Microchem J 2002. [DOI: 10.1016/s0026-265x(02)00060-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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8
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De Cremer K, Cornelis R, Strijckmans K, Dams R, Lameire N, Vanholder R. Behaviour of vanadate and vanadium-transferrin complex on different anion-exchange columns. Application to in vivo 48V-labelled rat serum. J Chromatogr B Analyt Technol Biomed Life Sci 2002; 775:143-52. [PMID: 12113980 DOI: 10.1016/s1570-0232(02)00278-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
The behaviour of free [48V]vanadate and [48V]vanadium-transferrin complex was investigated on five different anion-exchange columns (Mono Q 5/5 HR, Hitrap Q HP, Sepharose Q FF, Sepharose DEAE FF and Hitrap Q XL). The recovery of both V-compounds was quantitative. The peak shape and retention time of vanadate varied according to the type of column. The vanadium-transferrin complex also showed different elution patterns depending on the type of column. Especially in case of the Sepharose Q FF, Mono Q 5/5 HR and Hitrap Q XL columns the vanadium-transferrin binding was degraded during elution on the column. The results clearly prove that care should be taken as to the choice of column for speciation purposes of vanadium compounds in order to prevent various artefacts showing up in the chromatograms. A Hitrap Q HP column was used to fractionate different vanadium compounds in rat serum.
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Affiliation(s)
- Koen De Cremer
- Laboratory for Analytical Chemistry, Institute of Nuclear Sciences, Ghent University, Proeftuinstraat 86, B-9000 Ghent, Belgium.
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De Cremer K, Cornelis R, Strijckmans K, Dams R, Lameire N, Vanholder R. Fractionation of vanadium in urine of Wistar rats as a function of time after intraperitoneal injection. J Inorg Biochem 2002; 90:71-7. [PMID: 12009258 DOI: 10.1016/s0162-0134(02)00396-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
[(48)V]Vanadium was intraperitoneally injected into Wistar rats. Urine and feces were collected at regular intervals (n=19) between 1 and 144 h after injection. In case of urine, maximal excretion (V activity/ml urine) of vanadium was seen 3 h after injection. In case of feces, a maximum appeared 32 h after injection. Urine samples were fractionated on two types of gel filtration column (Superose 12 HR 10/30 and Superdex Peptide 10/30). We found that vanadium in urine exists as both high (protein-bound) and low molecular mass species and that the partition about these forms depends on the time elapsed after injection. After 1 h, respectively, four (one high molecular and three low molecular mass species) and five (one high molecular and four low molecular mass species) vanadium peaks were present in the chromatograms of the Superose 12 and the Superdex Peptide columns. Then 3 h after injection, a different high molecular species showed up in the chromatograms, while the first high molecular and some low molecular mass species disappeared. Vanadium in urine after 8 h occurred as one high (slightly different from the high molecular complex after 3 h) and one low molecular mass complex. However, after 48 h the pattern changed again and vanadium in urine was excreted largely as one low molecular mass species, presumably one of the species that also occurred 1 h after injection but was not present in the period 6-24 h.
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Affiliation(s)
- Koen De Cremer
- Laboratory for Analytical Chemistry, Institute for Nuclear Sciences, Ghent University, Proeftuinstraat 86, B-9000 Ghent, Belgium.
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De Cremer K, Cornelis R, Strijckmans K, Dams R, Lameire N, Vanholder R. Non-ideal behaviour of free vanadate on a Superose 12 size-exclusion column. Application to in vivo 48V-labelled rat spleen homogenate. JOURNAL OF CHROMATOGRAPHY. B, BIOMEDICAL SCIENCES AND APPLICATIONS 2001; 757:21-9. [PMID: 11419745 DOI: 10.1016/s0378-4347(01)00023-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Seven chromatographic columns were evaluated for the recovery of 48V-radiolabelled vanadate. Further, the behaviour of vanadate (H2VO4-) was studied on a size-exclusion column Superose 12 as a function of (a) buffer salt molarity, (b) different buffer salts, (c) different buffers and (d) organic solvents added to the buffer. As opposed to the unsatisfactory recovery of V-compounds on other columns, we recovered the vanadium quantitatively. We observed that in most cases vanadate eluted after the total volume of the Superose 12 column. This indicates a non-ideal behaviour of vanadate. However, through this non-ideal behaviour it was possible to separate low-molecular-mass bound (Mr<5000) and unbound vanadium which would not be possible under normal behaviour. A possible explanation for this non-ideal behaviour of vanadium is put forward. The method has been successfully applied for the fractionation of different vanadium species in rat spleen homogenate.
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Affiliation(s)
- K De Cremer
- Institute of Nuclear Sciences, Ghent University, Belgium.
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Production of carrier free192,193Hg and192,193Au in16O irradiated tantalum target and their separation by liquid-liquid extraction. J Radioanal Nucl Chem 1999. [DOI: 10.1007/bf02345583] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Das N, Banerjee S, Chatterjee K, Lahiri S. Separation of carrier-free 199Au as a β-decay product of 199Pt. Appl Radiat Isot 1999. [DOI: 10.1016/s0969-8043(98)00115-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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13
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Bujdosó E. Radiochemistry and radiochemical separations. J Radioanal Nucl Chem 1995. [DOI: 10.1007/bf02038060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Irradiation methods for production of high specific activity radionuclides in no carrier added form. J Radioanal Nucl Chem 1995. [DOI: 10.1007/bf02035961] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Gallorini M, Bonardi M, Birattari C, Groppi F, Saponaro S. Analytical and radioanalytical quality control in high specific activity radiotracer preparation. J Radioanal Nucl Chem 1995. [DOI: 10.1007/bf02041915] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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