共查询到20条相似文献,搜索用时 46 毫秒
1.
H. El-Said A. A. El-Sadek M. I. Aydia K. M. El-Azony 《Journal of Radioanalytical and Nuclear Chemistry》2018,317(3):1341-1347
The zirconium silicotungstate (ZrSiW) was studied as an effective sorbent material to be used in the 113Sn/113mIn generator. The results elucidated that the distribution coefficient of 113Sn (3700 mL/g) is greater than 113mIn (275 mL/g) from 0.1 M HCl acid solution to the ZrSiW material. The maximum sorption capacity of Sn (IV) was found to be 33 mg per gram ZrSiW (~?0.3 mmol/g). The elution yield of 113mIn was found to be >?78?±?6.4% with an acceptable purity of radionuclidic and radiochemical (≥?99.99 and 96.8%, respectively). The rigorous separation of 113mIn from the 125Sb was carried out due to its long half-life (2.758 years) and beta emission that causes tissue damage. Zr, W and Si levels are below the permitted limit in the 113mIn eluate. 相似文献
2.
H. El-Said M. Mostafa M. A. El-Amir 《Journal of Radioanalytical and Nuclear Chemistry》2009,279(1):263-269
A procedure for separation of no-carrier-added 113mIn(III) radioisotope from a bulk of 110mAg has been developed. The sorption behavior of 113mIn(III) and 110mAg(I) ions in HNO3 acid solutions on different tungstocerate matrices showed high affinity of 110mAg(I) ions towards tungstocerate(IV) gel matrices compared with 113mIn(III) ions. No-carrier-added 113mIn radionuclide was separated from 110mAg on 12-tungstocerate(IV) column matrix. 11 mL 0.3M HNO3 acid solution was enough for eluting the 113mIn from the column bed. 110mAg was recovered from the column by eluting the column bed with 12 mL 2M HNO3 acid solution. 相似文献
3.
S. V. Ermolaev B. L. Zhuikov V. M. Kokhanyuk A. A. Abramov N. R. Togaeva S. V. Khamianov S. C. Srivastava 《Journal of Radioanalytical and Nuclear Chemistry》2009,280(2):319-324
A method for production of no-carrier-added 117mSn (NCA 117mSn) has been developed. It includes proton irradiation of thick antimony targets and chemical recovery of 117mSn by extraction of Sb with dibutyl ether and chromatographic purification on silica gel column. The method provides production
of curie amounts of 117mSn with specific activity about 1000 Ci/g and high radionuclidic purity. 相似文献
4.
Binita Dutta Moumita Maiti Susanta Lahiri 《Journal of Radioanalytical and Nuclear Chemistry》2009,281(3):663-667
natY foil was irradiated by 20 MeV proton to produce no-carrier-added 88,89Zr. A comparative evaluation on radioanalytical separation methods of 88,89Zr was carried out from irradiated target matrix by both liquid–liquid (LLX) and solid–liquid (SLX) extraction methods using
di-(2-ethylhexyl) phosphoric acid (HDEHP) dissolved in cyclohexane as liquid cation exchanger and Dowex 50W-X8 H+ form (20–50 mesh) as solid cation exchanger. Both the methods offer good separation and high yield of nca 88,89Zr but SLX offers much higher separation factor and better yield. 相似文献
5.
S. Ambe 《Journal of Radioanalytical and Nuclear Chemistry》1984,81(1):77-87
Adsorption behaviour of trace elements, In(III), Sn(IV), Sb(V) and Te(IV) on activated carbon and graphite powder was studied. Adsorption characteristics of the ions enabled the separation of In(III)–Sn(IV), Sn(IV)–Sb(V) and Sb(V)–Te(IV) pairs. Applications to practical separation, milking of113mIn from113Sn, removal of tin impurity from119Sb, and milking of119Sb from119mTe, are presented. 相似文献
6.
M. Liezers O. T. FarmerIII M. L. Thomas 《Journal of Radioanalytical and Nuclear Chemistry》2009,282(1):309-313
The measurement of fission product cesium isotopes 135Cs and 137Cs at low femtogram (fg) 10−15 levels in ground water by Inductively Coupled Plasma-Mass Spectrometry (ICP-MS) is reported. To eliminate the natural barium
isobaric interference on the cesium isotopes, in-line chromatographic separation of the cesium from barium was performed followed
by high sensitivity ICP-MS analysis. A high efficiency desolvating nebulizer system was employed to maximize ICP-MS sensitivity
~10 cps/fg. The three sigma detection limit for 135Cs was 2 fg/mL (0.1 μBq/mL) and for 137Cs 0.9 fg/mL (0.0027 Bq/mL) measured from the standard with analysis time of less than 30 min/sample. Cesium detection and
135/137 isotope ratio measurement at very low femtogram levels using this method in a spiked ground water matrix is also demonstrated. 相似文献
7.
Thin-layer chromatography is applied to the separation of 113mIn from 113Sn. Different factors influencing migration and separation of the ions are investigated. The method can be used for the examination of the purity of isolated 113mIn solutions. 相似文献
8.
Moumita Maiti Susanta Lahiri B. S. Tomar 《Journal of Radioanalytical and Nuclear Chemistry》2012,291(2):427-432
149Gd was produced from the 12C induced reaction on natural praseodymium target. No-carrier-added (nca) 149Gd was separated from the bulk target matrix by liquid–liquid extraction (LLX) using cation exchanger di-(2-ethylhexyl)phosphoric
acid (HDEHP) dissolved in cyclohexane. High separation factor of 2,450 was achieved at the optimal experimental condition
when 1% HDEHP and 0.1 M HCl were used as organic and aqueous phases respectively. The result was also compared with the previous
reports. 相似文献
9.
Methods are proposed for the determination of113Sn in the eluate of an113mIn generator as well as for the analysis of its chemical and radionuclidic purity. Two generators of different origin have been studied. The presence of the radioisotopes113Sn,125Sb,125mTe and the elements Zr, Si and Fe have been found in the eluate. Recommendations are given for the use of such generators. 相似文献
10.
Mahdi Sadeghi Milad Enferadi Mohammadreza Aboudzadeh Parvin Sarabadani 《Journal of Radioanalytical and Nuclear Chemistry》2011,287(2):585-589
This article presents, 122Sb (T
1/2 = 2.723 days, I
β- = 97.59%) was produced via the natSn(p,xn) nuclear process at the AMIRS (Cyclone-30, IBA, Belgium). The electrodeposition experiments were carried out by potassium
stannate trihydrate (K2Sn(OH)6) and potassium hydroxide. The optimum conditions of the electrodeposition of tin were as follows: 40 g/L natSn, 20 g/L KOH, 115 g/L K2Sn(OH)6, DC current density of 5 A/dm2 with a bath temperature of 75 °C. The electroplated Tin-target was irradiated with 26.5 MeV protons at current of 180 μA
for 20 min. Solvent extraction of no-carrier-added 122Sb from irradiated Tin-natural target hydrochloric solution was investigated using di-n-butyl ether (C8H18O). Yields of about 3.61 MBq/μAh were experimentally obtained. 相似文献
11.
D. K. Bhattacharyya N. C. Dutta A. De 《Journal of Radioanalytical and Nuclear Chemistry》1990,140(1):121-131
The uptake of 22 cations at tracer concentrations has been studied over hydrous tin dioxide exchanger material. A granular variety of tin dioxide was prepared from the reaction of tin(IV) chloride with NaOH solution, and the formula of the material was ascertained to be SnO2·1.7 H2O. Radiochemical separation of carrier-free234Th from238U and113mIn from113Sn was achieved over a tin dioxide column. The separated products were of high radionuclidic purity. The overall separation procedures are very simple and quick with quantitative yield. 相似文献
12.
H. M. Talaat A. A. El-Mohty M. T. El-Kolaly 《Journal of Radioanalytical and Nuclear Chemistry》2010,284(1):1-5
Improved radionuclide generator include a substantially insoluble salt of a radioactive parent which may be directly packed
in column for subsequent elution of the daughter radionuclide. An improved 188Re generator was prepared by reacting a radioactive tungsten (188W) as parent radionuclide incorporated with aluminum chloride to obtain an insoluble radioactive aluminum tungstate matrix.
The investigated matrix was characterized on the basis of the chemical composition, IR, thermal analysis and mechanical stabilities.
The factors affecting the elution performance were studied such as influence of pH, molar ratio and drying temperature. From
the obtained data, the molar ratio W:Al was 1.5:1 at pH = 4, the matrix dried at 105 °C for 2 h. Chromatographic and multichannel
analysis has been currently used to investigate the radiochemical and radionuclidic purity respectively on eluted 188Re. An elution yield more than 80%, with radiochemical purity <98% and radionuclidic purity <99% with a 188W break through >10−4% of the column. The Al+3 and W contents value were about 2 and 3 μg/mL eluate. The obtained data approved the stability of the prepared generator
and its suitability for medical application. 相似文献
13.
Preparation and preliminary evaluation of <Superscript>211</Superscript>At-labeled amidobisphophonates 总被引:1,自引:0,他引:1
Yuanyou Yang Ning Liu Jiali Liao Manfei Pu Yebin Liu Min Wei Jiannan Jin 《Journal of Radioanalytical and Nuclear Chemistry》2010,283(2):329-335
In this paper, 3-amino-1-hydroxypropylidene-1,1-bisphosphonate(APB), a amidobisphophonate was synthesized and labeled with
the α-emitter 211At by an indirect method using N-succinimidyl 5-(tributylstannyl)-3-pyridinecarboxylate (SPC) as a bi-functional linker, and
the conjugated amidobisphophonate (211At-SAPC-APB) was preliminarily evaluated in vitro and in vivo by comparison with free astatide (211At−) and 99mTc-MDP. 3-amino-1-hydroxypropylidene-1,1-bisphosphonate(APB) was prepared using β-alanine as the starting material. With SPC
bi-functional linker, APB was conjugated with 211At in a labeling yield of 80–90% with radiochemical purity of more than 99%. The conjugated amidobisphophonate (211At-SAPC-APB) exhibited considerable stability in vitro, in that the radiochemical purity of 211At-SAPC-APB was still more than 98% in 0.1 mol/L PBS (pH 7.6) or in fetal calf serum, even stayed for 24 h at room temperature
(RT). Biodistribution of 211At-SAPC-APB was investigated in NIH strain mice by I.V injection. The results showed that 211At-SAPC-APB could rapidly locate in shank, with the maximum uptake of 23.70 ± 2.29% I.D/g at 6 h, earlier than that of 99mTc-MDP at 12 h, and stayed in the bone for long time. Moreover, 211At-SAPC-APB uptake in some key organs or tissues, especially in thyriod, stomach, lung and spleen, was much less than that
of free astatide (211At−), implying that 211At-SAPC-APB was constantly stable in vivo as well as in vitro. These results indicated that 211At-SAPC-APB will be a suitable candidate for the targeted radiotherapy of bone metastases and should be further investigated. 相似文献
14.
A. Mushtaq M. S. Mansur Ali Muhammad 《Journal of Radioanalytical and Nuclear Chemistry》1996,212(2):107-115
Hydrated antimony pentoxide (HAP) as an absorbent for column operation has been prepared by hydrolysis of SbCl5 with deionized water. Sorption behavior of Sn, Cd, Sb and In was studied on HAP in HCl medium. Radiochemical separation of no-carrier added113mIn from113Sn/125Sb and115mIn from115Cd wa achieved over a HAPO column. The separated products were of high radionuclidic purity. 相似文献
15.
Rajesh Chakraborty Sanjoy Dhara Sukalyan Basu Pabitra Chattopadhyay 《Journal of Radioanalytical and Nuclear Chemistry》2011,287(1):55-59
An inorganic ion exchanger, quinolinephosphomolybdate has been synthesized and characterized by elemental analysis, infrared
(IR) and X-ray diffraction (XRD) spectroscopy. This compound is highly stable toward thermal, chemical and radiation dose.
This has been employed in the separation of carrier-free 90Y from its parent 90Sr from an equilibrium mixture. The absorbed daughter was recovered by using 0.0284 mol L−1 ascorbic acid solutions at pH 5.0 as eluting agent. 相似文献
16.
Hojjat Nadi Mahdi Sadeghi Milad Enferadi Parvin Sarabadani 《Journal of Radioanalytical and Nuclear Chemistry》2011,289(2):361-365
In the present study, ytterbium-169 was produced via the 169Tm(p, n)169Yb nuclear process at the AMIRS (Cyclone-30, IBA, Belgium) cyclotron, irradiating Tm2O3 with proton particles of 15 MeV primary energy and 20 μA current for 20 min. Deposition of Tm2O3 on Cu substrate was carried out via by the sedimentation method. The 543 mg of thulium(III)oxide with 108 mg of ethyl cellulose
and 8 mL of acetone were used to prepare a Tm2O3 layer of 11.69 cm2. Yields of about 0.643 MBq 169Yb per μAh were experimentally obtained. 169Yb was separated in 80 ± 5% radiochemical yield using liquid–liquid extraction. Solvent extraction of no-carrier-added 169Yb from irradiated thulium(III)oxide target hydrochloric solution was investigated using di-(2-ethylhexyl)phosphoric acid
(HDEHP). 相似文献
17.
L. Popov G. Mihailova I. Naidenov 《Journal of Radioanalytical and Nuclear Chemistry》2010,285(2):223-237
The origins of different artificial radionuclides found in soils from Northern and Southern Bulgaria was determined by measurements
of their actual concentrations and respective ratios. On the basis of the measured mobility and concentrations of the investigated
radionuclides in soils, it was estimated that after the Chernobyl accident the mean depositions of fresh 137Cs were 3.0 ± 2.5 kBq/m2 for Northern Bulgaria and 15 ± 7 kBq/m2 for Southern Bulgaria. As a result of global fallout following atmospheric nuclear weapon tests in the 1950s, mean depositions
(corrected to 1965) were calculated for Northern and Southern Bulgaria as follows: for 90Sr—1.0 ± 0.5 and 2.3 ± 1.3 kBq/m2, 238Pu—1.3 ± 0.8 and 2.8 ± 1.6 Bq/m2, 239+240Pu—15 ± 14 and 47 ± 38 Bq/m2, and 241Pu—520 ± 200 and 760 ± 260 Bq/m2. 相似文献
18.
Donald E. Dry Warren J. OldhamJr. Scott M. Bowen 《Journal of Radioanalytical and Nuclear Chemistry》2009,282(2):635-640
The long-lived rare earth isotopes 151Sm (90 years, β
max = 76.3 keV) and 147Pm (2.62 years, β
max = 224.6 keV) are low-yield fission products that generally require lengthy separation procedures to isolate and count by
their beta emissions. We will describe novel liquid scintillation counting techniques using radioactive tracers to determine
radiochemical yields from an environmental matrix. The recovery of 151Sm is determined from the alpha decay (2.25 MeV) of 147Sm in the natural Sm carrier and is in excellent agreement with the gravimetric recovery. The 147Pm recovery is determined by the use of 145Pm (17.7 years, EC) tracer, custom-produced at LANL using an isotopically enriched target of 144Sm. We have determined the 145Pm recovery both from the 37.4 keV kα1 X-ray, and the electron-capture emissions by LSC. A comparison of these recovery methods is presented. 相似文献
19.
Árpád Bihari Zoltán Szűcs Magdolna Mogyorósi Tamás Pintér 《Journal of Radioanalytical and Nuclear Chemistry》2010,286(3):759-763
The low- and intermediate-activity level liquid wastes produced by the Paks Nuclear Power Plant (NPP) contain routinely measureable
gamma-emitting (e.g., 54Mn, 60Co, 110mAg, and 137Cs) as well as many so-called “difficult-to-measure” radionuclides. Despite of their low specific activity compared to the
total, the reliable determination of these radionuclides is an important issue of nuclear waste management. The increasing
amount of waste samples to be qualified yearly by our laboratory put a pressure on revising the existing procedure of 99Tc separation applied. We have managed to halve the initial amount of the sample required to achieve the same level of detection
of technetium. Furthermore, one of the new purifying steps introduced have proved to be able to separate 108mAg (and 110mAg) better than 99% keeping the 99Tc content of the product almost intact. Means of separation of 99Tc from 106Ru and 124+125Sb have also been successfully investigated. As intended, this new procedure has a major impact on the chemical reagent as
well as the electricity requirement of the separation making it more cost-effective. 相似文献
20.
M. Amin M. A. El-Amir H. E. Ramadan H. El-Said 《Journal of Radioanalytical and Nuclear Chemistry》2018,318(2):915-922
A procedure for preparation of 99Mo/99mTc radioisotope generator based on low specific activity neutron activated 99Mo was developed. Aluminum molybdate(VI)-99Mo of high Mo(VI) content (~?364 mg/g Al99Mo) was prepared by mixing low specific activity molybdate(VI)-99Mo and aluminum mixture solution with isoamyl alcohol. Al99Mo gel matrix was precipitated when the pH of the mixture solution was raised to ~?5 by addition of NaOH to the mixture. Radiometric measurements indicate the strong fixation of Molybdate(VI)-99Mo species in the form of the sparingly insoluble Al99Mo gel matrix. The prepared AlMo gel matrix was physiochemically characterized. Al99Mo gel matrix was used as a base material for preparation of 99Mo/99mTc generator. The 99mTc eluted from 99Mo/99mTc radioisotope generator was found to have relatively high elution yield (84?±?2.3%), radionuclidic (≥?99.99%), radiochemical (98.1?±?0.9%) and chemical purity. 相似文献