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    Wyświetlanie 1-6 z 6
    Tytuł:
    Isotope effects of gallium and indium in cation exchange chromatography
    Autorzy:
    Dembiński, W.
    Herdzik, I.
    Skwara, W.
    Bulska, E.
    Wysocka, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/146163.pdf
    Data publikacji:
    2006
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    isotope separation
    chemical isotope effect
    ion-exchange chromatography
    Opis:
    The isotope effects of gallium (69/71Ga) and indium (113/115In) have been determined in the system: strong cation exchanger (Dowex 50-X8)/HCl. The sings of gallium and indium effects were opposite, i.e., the heavier isotope of gallium was fractionated into the resin phase, while the heavy isotope of indium was fractionated into the liquid phase. The values of unit separation gains were found to be +3.0 ´ 10-5 for gallium and –2.0 ´ 10-4 for indium. A possible explanation of the effects is proposed.
    Źródło:
    Nukleonika; 2006, 51, 4; 217-220
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dictyonema black shale and Triassic sandstones as potential sources of uranium
    Autorzy:
    Kiegiel, K.
    Zakrzewska-Kołtuniewicz, G.
    Gajda, D.
    Miśkiewicz, A.
    Abramowska, A.
    Biełuszka, P.
    Danko, B.
    Chajduk, E.
    Wołkowicz, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/147500.pdf
    Data publikacji:
    2015
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    uranium ores
    leaching
    extraction
    ion-exchange chromatography
    precipitation
    Opis:
    The main objective of the present study was an assessment of the possibility of uranium recovery from domestic resources in Poland. In the fi rst stage uranium was leached from the ground uranium ore by using acidic (sulfuric acid or hydrochloric acid) or alkaline (carbonate) solutions. The leaching efficiencies of uranium were dependent on the type of ore and it reached 81% for Dictyonemic shales and almost 100% for sandstones. The novel leaching routes, with the application of the helical membrane contactor equipped with rotating part were tested. The obtained postleaching solutions were concentrated and purifi ed using solvent extraction or ion exchange chromatography. New methods of solvent extraction, as well as hybrid processes for separation and purifi cation of the product, were studied. Extraction with the use of membrane capillary contactors that has many advantages above conventional methods was also proposed as an alternative purification method. The fi nal product U3O8 could be obtained by the precipitation of ‘yellow cake’, followed by calcination step. The results of precipitation of ammonium diuranate and uranium peroxide from diluted uranium solution were presented.
    Źródło:
    Nukleonika; 2015, 60, No. 3, part 2; 515-522
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Routine simultaneous production of no-carrier-added high purity 64Cu and 67Ga
    Autorzy:
    Al Rayyes, A. H.
    Ailouti, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/147595.pdf
    Data publikacji:
    2011
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    64Cu
    targetry
    radioisotope production
    ion-exchange chromatography
    Opis:
    A routine production method of no-carrier-added 64Cu was performed. A copper target support is electroplated by gold then an optimized thickness of enriched 68Zn layer is deposited. The 68Zn target was bombarded with a 23.5 MeV and 250 miA proton beam, generating the main nuclear reactions 68Zn(p,2n)67Ga and 68Zn(p,alfa n)64Cu. A semi-automated separation method using a chromatographic column system was developed for 64CuCl2 production. A 600 mCi batch of 64Cu is produced at the end of separation and purification chemistry. The radionuclidic purity of 64Cu was less than 98% as required by the United States and European Pharmacopoeias. Radiochemical purity and activity concentration is suitable for labeling different ligands to produce diagnostic and therapeutic radiopharmaceuticals.
    Źródło:
    Nukleonika; 2011, 56, 4; 259-262
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Production and separation of manganese-54 from alpha-irradiated V2O5 target
    Autorzy:
    Kłos, M.
    Bartyzel, M.
    Petelenz, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/146185.pdf
    Data publikacji:
    2006
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    ion-exchange chromatography
    sotope production
    54Mn
    48V
    cyclotron
    Opis:
    Our aim was to obtain and isolate the carrier-free gamma emitter, 54Mn. Manganese-54 was produced via cyclotron activation in the 51V(alfa,n)54Mn reaction, and separated from HCl solution on Dowex-50 . 8 resin. The effectiveness of chemical separation was checked using the internal tracer 48V, produced in a cyclotron via the natTi(p,xn)48V reaction. The microcomponent 54Mn was eluted from the column with 3 M HCl, and vanadium with a 0.1 M HCl/ethanol/H2O2 mixture. The pair Ti/48V was separated on Dowex-50 . 8, using 0.03 M HClO4 as the eluent for 48V and 1 M HClO4 for natTi. The carrier-free 54Mn was of 99.9% radionuclide purity. In separation of the carrierfree pair 54Mn/48V, the recovery yield was 98.7% for 54Mn and 96.4% for 48V.
    Źródło:
    Nukleonika; 2006, 51, 4; 221-224
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Two new separation schemes for the group isolation of rare earth elements (REE) from biological and other matrices and their determination by ICP-MS, NAA and chromatographic methods
    Autorzy:
    Dybczyński, R. S.
    Samczyński, Z.
    Bartosiewicz, I.
    Kulisa, K.
    Polkowska-Motrenko, H.
    Pyszynska, M.
    Zuba, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/147581.pdf
    Data publikacji:
    2017
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    rare earth elements
    REE
    lanthanides
    ion exchange chromatography
    NAA
    ICP-MS
    accuracy
    certified reference materials
    CRM
    Opis:
    Two new group separation schemes, based on ion exchange chromatography, for the selective and quantitative isolation of rare earth elements (REE) from accompanying elements, were devised. After checking their performance with the aid of radioactive tracers, the schemes were further used together with ICP-MS, NAA and ion exchange chromatography for the determination of Sc, Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu in two certified reference materials (CRMs). The results were compared with another series of analyses, where the REEs were determined directly, i.e. without pre-separation, by instrumental neutron activation analysis (INAA) and inductively coupled plasma mass spectrometry (ICP-MS). It was demonstrated that while direct INAA and ICP-MS in most instances provide reliable results for the majority of REEs, for some elements, notably Sc, Yb and Tm in the cases of ICP-MS and INAA, respectively, systematic errors occur or may potentially occur.
    Źródło:
    Nukleonika; 2017, 62, 3; 199-211
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    High pure, carrier free 85Sr and 83Rb tracers obtained with AIC-144 cyclotron
    Autorzy:
    Misiak, R.
    Gaca, P.
    Bartyzel, M.
    Mietelski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/148437.pdf
    Data publikacji:
    2003
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    AIC-144 cyclotron
    carrier free tracers
    environmental radioactivity
    ion-exchange chromatography
    rubidium-83
    strontium-82
    strontium-85
    Opis:
    The method of obtaining carrier free tracers, 85Sr and 83Rb from proton-irradiated natRbCl target is described. The separation of the radionuclides was done using Sr-Resin, the resin based on a crown ether. Current and some other possible applications of the tracers are discussed.
    Źródło:
    Nukleonika; 2003, 48, 3; 151-153
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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