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Phosphinimines as selective extractants for Tc-99 pertechnetate 磷亚胺作为高技术酸Tc-99的选择性萃取剂
rca - Radiochimica Acta Pub Date : 2008-03-01 DOI: 10.1524/ract.2008.1497
L. Arrigo, M. Galenas, R. Kannan, K. Katti, S. Jurisson
{"title":"Phosphinimines as selective extractants for Tc-99 pertechnetate","authors":"L. Arrigo, M. Galenas, R. Kannan, K. Katti, S. Jurisson","doi":"10.1524/ract.2008.1497","DOIUrl":"https://doi.org/10.1524/ract.2008.1497","url":null,"abstract":"Summary The triphenylphosphiniminium cation (Ph3P=NH2+) was evaluated for its selectivity for the pertechnetate anion (99TcO4−) using both solvent extraction and solid phase extraction methods. The solid phase extraction of TcO4− using trimethylsilyl-protected triphenylphosphinimine coated silica gel demonstrated the selectivity of the triphenylphosphiniminium cation for TcO4− over a variety of inorganic (NO3−, Cl−, H2PO4−, HSO4−/SO42−) and organic (fumarate) anions in aqueous solution (>98% extracted when at pM TcO4−vs. 0.15 M anion). Iodide, lactate, benzoate and acetate were able to compete with pertechnetate (only 11–83% extracted) when present in large excess (0.15 M anion vs. 10−12 M 99mTcO4−), but not when the anion was present in a 10-fold excess. The triphenylphosphiniminium cation was significantly selective for TcO4− over ReO4−, a commonly used non-radioactive analog for 99Tc, when tracer amounts of both competed with the anions iodide, lactate, benzoate and acetate.","PeriodicalId":125676,"journal":{"name":"rca - Radiochimica Acta","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117040215","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Preparation, quality control and biodistribution studies of [67Ga]-DOTA-anti-CD20 [67Ga]- dota抗cd20的制备、质量控制及生物分布研究
rca - Radiochimica Acta Pub Date : 2008-03-01 DOI: 10.1524/ract.2008.1494
A. Jalilian, L. Mirsadeghi, R. Haji-Hosseini, A. Khorrami
{"title":"Preparation, quality control and biodistribution studies of [67Ga]-DOTA-anti-CD20","authors":"A. Jalilian, L. Mirsadeghi, R. Haji-Hosseini, A. Khorrami","doi":"10.1524/ract.2008.1494","DOIUrl":"https://doi.org/10.1524/ract.2008.1494","url":null,"abstract":"Summary Rituximab was successively labeled with [67Ga]-gallium chloride. The macrocyclic bifunctional chelating agent, N-succinimidyl-1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid (DOTA-NHS) was prepared at 25 °C using DOTA, N-hydroxy succinimide (NHS) in CH2Cl2. DOTA-Rituximab was obtained by the addition of 1 mL of a Rituximab pharmaceutical solution (5 mg/mL, in phosphate buffer, pH=7.8) to a glass tube pre-coated with DOTA-NHS (0.01–0.1 mg) at 25 °C with continuous mild stirring for 15 h. Radiolabeling was performed at 37 °C in 3 h. Radio-thin layer chromatography showed an overall radiochemical purity of 90%–95% at optimized conditions (specific activity = 30 GBq/mg, labeling efficacy; 82%). The final isotonic 67Ga-DOTA-rituximab complex was checked by gel electrophoresis for radiolysis. Radio-TLC was performed to ensure that only one species was present after filtration through a 0.22 μm filter. Preliminary biodistribution studies in normal rat model performed to determine complex distribution of the radioimmunoconjugate up to 28 h.","PeriodicalId":125676,"journal":{"name":"rca - Radiochimica Acta","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115317350","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 11
Solvent extraction of americium and europium ions by amide-derivatized polyethers from picric acid aqueous solution 用酰胺衍生聚醚萃取苦味酸水溶液中的镅和铕离子
rca - Radiochimica Acta Pub Date : 2008-03-01 DOI: 10.1524/ract.2008.1495
F. Fan, F. Lei, H. Ding, J. Bai, Li-na Zhang, Mao-sheng Lin, Xiao-lei Wu, Zhi Qin
{"title":"Solvent extraction of americium and europium ions by amide-derivatized polyethers from picric acid aqueous solution","authors":"F. Fan, F. Lei, H. Ding, J. Bai, Li-na Zhang, Mao-sheng Lin, Xiao-lei Wu, Zhi Qin","doi":"10.1524/ract.2008.1495","DOIUrl":"https://doi.org/10.1524/ract.2008.1495","url":null,"abstract":"Summary The extraction of Am3+ and Eu3+ from picric acid aqueous solution by N,N-1,2-ethanediyl-bis[2-(N,N-diphenyl-carbamoyl-methoxy)-benzamide] was investigated by a radioactive tracer technique. The composition of the extracted species has been determined as ML(Pic)3 (M=Eu, Am). The effect of various parameters such as pH, organic diluents, different extractants, picric acid concentration and extractants concentration on the extraction of Am3+ and Eu3+ has been studied. The extraction equilibrium mechanism has been also evaluated and discussed.","PeriodicalId":125676,"journal":{"name":"rca - Radiochimica Acta","volume":"924 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131988796","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of humic acid, fulvic acid, pH and temperature on the sorption-desorption of Th(IV) on attapulgite 腐植酸、黄腐酸、pH和温度对凹凸棒石吸附-解吸Th(IV)的影响
rca - Radiochimica Acta Pub Date : 2008-03-01 DOI: 10.1524/ract.2008.1475
Q. Fan, W. S. Wu, X. P. Song, J. Z. Xu, J. Hu, Z. Niu
{"title":"Effect of humic acid, fulvic acid, pH and temperature on the sorption-desorption of Th(IV) on attapulgite","authors":"Q. Fan, W. S. Wu, X. P. Song, J. Z. Xu, J. Hu, Z. Niu","doi":"10.1524/ract.2008.1475","DOIUrl":"https://doi.org/10.1524/ract.2008.1475","url":null,"abstract":"Summary Sorption of Th(IV) on attapulgite as a function of pH and temperature in the presence and absence of humic acid and fulvic acid was studied under ambient conditions using batch technique. The results indicated that sorption of Th(IV) on attapulgite was strongly affected by pH values. The presence of humic acid and fulvic acid enhanced the sorption of Th(IV) at low pH values and no significant influence was observed at high pH values. Sorption of Th(IV) was mainly dominated by surface complexation. Sorption of Th(IV) increased with increasing temperature of the system. Enthalpy (ΔH0), entropy (ΔS0) and Gibbs free energy (ΔG0) were calculated from the temperature dependent sorption data, and the results indicated that the sorption of Th(IV) on attapulgite was a spontaneous process. The results of sorption and desorption of Th(IV) on HS bound attapulgite indicated that the sorption of Th(IV) on HS-attapulgite hybrids was reversible.","PeriodicalId":125676,"journal":{"name":"rca - Radiochimica Acta","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124509300","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 39
Hexafluoro complex of rutherfordium in mixed HF/HNO3 solutions 卢瑟福在HF/HNO3混合溶液中的六氟配合物
rca - Radiochimica Acta Pub Date : 2008-03-01 DOI: 10.1524/ract.2008.1474
A. Toyoshima, H. Haba, K. Tsukada, M. Asai, K. Akiyama, S. Goto, Y. Ishii, I. Nishinaka, T. Sato, Y. Nagame, W. Sato, Y. Tani, H. Hasegawa, K. Matsuo, D. Saika, Y. Kitamoto, A. Shinohara, M. Ito, J. Saito, H. Kudo, A. Yokoyama, M. Sakama, K. Sueki, Y. Oura, H. Nakahara, M. Schädel, W. Brüchle, J. Kratz
{"title":"Hexafluoro complex of rutherfordium in mixed HF/HNO3 solutions","authors":"A. Toyoshima, H. Haba, K. Tsukada, M. Asai, K. Akiyama, S. Goto, Y. Ishii, I. Nishinaka, T. Sato, Y. Nagame, W. Sato, Y. Tani, H. Hasegawa, K. Matsuo, D. Saika, Y. Kitamoto, A. Shinohara, M. Ito, J. Saito, H. Kudo, A. Yokoyama, M. Sakama, K. Sueki, Y. Oura, H. Nakahara, M. Schädel, W. Brüchle, J. Kratz","doi":"10.1524/ract.2008.1474","DOIUrl":"https://doi.org/10.1524/ract.2008.1474","url":null,"abstract":"Summary Formation of anionic fluoride-complexes of element 104, rutherfordium, produced in the 248Cm(18O,5n) 261Rf reaction was studied by anion-exchange on an atom-at-a-time scale. It was found that the hexafluoro complex of Rf, [RfF6]2−, was formed in the studied fluoride ion concentrations of 0.0005–0.013 M. Formation of [RfF6]2− was significantly different from that of the homologues Zr and Hf, [ZrF6]2− and [HfF6]2−; the evaluated formation constant of [RfF6]2− is at least one-order of magnitude smaller than those of [ZrF6]2− and [HfF6]2−.","PeriodicalId":125676,"journal":{"name":"rca - Radiochimica Acta","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132702653","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 33
Speciation of An(IV) (Pu, Np, U and Th) in citrate media 柠檬酸盐介质中An(IV) (Pu, Np, U和Th)的形态
rca - Radiochimica Acta Pub Date : 2008-03-01 DOI: 10.1524/ract.2008.1476
L. Bonin, G. Cote, P. Moisy
{"title":"Speciation of An(IV) (Pu, Np, U and Th) in citrate media","authors":"L. Bonin, G. Cote, P. Moisy","doi":"10.1524/ract.2008.1476","DOIUrl":"https://doi.org/10.1524/ract.2008.1476","url":null,"abstract":"Summary The acquisition of additional data concerning actinide decorporation is planned under the French nuclear and environmental toxicology program. Citric acid is a fundamental biological constituent found at relatively high concentrations in blood plasma and is involved in many biological processes. Spectrophotometry was the primary method used to determine the speciation of An(IV)-citrate systems (Th, U, Np, Pu). Complexation phenomena were identified, especially the formation of complexes with 1:1 and 1:2 stoichiometries. The corresponding conditional constants were calculated according to the experimental conditions. Depending on the acid-base form of the ligand (H2Cit−, HCit2− or Cit3−) the apparent stability constants were also calculated and compared for various tetravalent actinides.","PeriodicalId":125676,"journal":{"name":"rca - Radiochimica Acta","volume":"122 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132127348","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 12
About low oxidation states, hydration and covalence properties of f elements 关于f元素的低氧化态、水合和共价性质
rca - Radiochimica Acta Pub Date : 2008-03-01 DOI: 10.1524/ract.2008.1470
F. David
{"title":"About low oxidation states, hydration and covalence properties of f elements","authors":"F. David","doi":"10.1524/ract.2008.1470","DOIUrl":"https://doi.org/10.1524/ract.2008.1470","url":null,"abstract":"Summary The existence of low oxidation states of lanthanides and actinides in aqueous solution has been re-examined in the light of recent data. The retained redox data corresponding to the 3+/2+ couples are given, and earlier reports of the existence of monovalent mendelevium is not confirmed. By comparing divalent, trivalent and tetravalent ions, the effective charges of the lanthanide and actinide ions have been quantified. It is shown, based on experimental EXAFS data, and modelling of the aquo ions, that the covalent effect in these series increases with the oxidation state, is larger for actinides than for lanthanides and maximum for trivalent and tetravalent ions at the beginning of the series and, in each case, becoming negligible around the middle of the series. For divalent ions this covalent effect is small and constant through the series. Characteristics of the ions have been evaluated and hydration properties deduced.","PeriodicalId":125676,"journal":{"name":"rca - Radiochimica Acta","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131831096","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 17
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