uranium thorium determination

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  • Determination of uranium, thorium and potassium DeepDyve

    Read "Determination of uranium, thorium and potassium activity concentrations in soil cores in Araba Valley, Jordan, Radiation Protection Dosimetry" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publiions available at your fingertips.

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  • Determination of Uranium and Thorium in Natural Waters by

    —An online solid phase extraction method, linked to inductively coupled plasma optical emission spectrometry (ICP–OES), has been examined using octadecylbonded silica cartridge for determination of low levels of uranium and thorium in aqueous samples. 2,3dihydro9,10dihydroxy1,4anthracenedion forms a

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  • Simultaneous Spectrophotometric Determination of Uranium

    Simultaneous determination of uranium and thorium using arsenazo III as a chromogenic reagent at pH 1.70 by Hpoint standard addition method (HPSAM)

    Published in: Journal of The Chinese Chemical Society · 2007Authors: Ali Niazi · Nahid Ghasemi · Mohammad Goodarzi · Ali EbadiAffiliation: Islamic Azad UniversityAbout: Uranium · ThoriumChat Online
  • Separation and determination of uranium and thorium in

    separate uranium and thorium from zircon sands. The two elements were de~ermined both by physicalchemical techniques /fluo rimetry and colorimetry/ and by radiometric techniques /alpha spectrometry/ afEer electro deposition: their respective contents agreed well furthermore, uranium and thorium iso

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  • Determination of Uranium, Thorium, Plutonium, Americium

    The determination of activities of thorium, uranium, plutonium, americium, and curium at very low levels has been performed by a new α liquid scintillation system (PERALS, name registered to

    Published in: Analytical Chemistry · 1997Authors: Nicolas Dacheux · Jean AupiaisAbout: Detection limit · Plutonium · Thorium · Liquid scintillation counting · Angular resolutionChat Online
  • Uranium Wikipedia

    Uranium234, which is a member of the uranium series (the decay chain of uranium238), decays to lead206 through a series of relatively shortlived isotopes. Uranium233 is made from thorium232 by neutron bombardment, usually in a nuclear reactor, and 233 U is also fissile.

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  • Characteristics of log responses and lithology

    Both the uranium and thorium contents show an increasing trend from basic igneous rocks to acid ones, but the rate of increase of uranium is lower than that of thorium. Therefore, the lithologies of the igneous rocks can be effectively determined from the uranium versus thorium crossplot.

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  • uranium thorium dating problems order of states to allow

    Uranium thorium dating, also called thorium230 dating, uraniumseries disequilibrium dating or uraniumseries dating, is a radiometric dating technique established in the 1960s which has been used since the 1970s to determine the age of calcium carbonate materials such as speleothem or coral.

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  • Determination of traces of uranium and thorium in titanium

    and online procedures developed for uranium and thorium prior to their analytical determination were recently reviewed in terms of enrichment factor, retention/sorption capacity, and validation using certified reference materials and appliion to complex real samples. 6. ICPMS was successfully used for the measurements of

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  • AN 79: Determination of Uranium and Thorium in Complex

    Figure 2 Determination 01 uranium and thorium by Ion chromatography using direct thorium, these elements can be concentrated from the sample injection matrix by chelation concentration. Using a 5mL sample, trace concentrations of uranium and thorium can be determined, as shown in Figure 4. Note that the concentration ratio of uranium

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  • M. RAHMAN et al.: DETERMINATION OF URANIUM AND

    determination of uranium and thorium, instrumental neulron activation analysis (INAA) is. of particular interest. 5 The method is simple, fast and nondestructive

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  • Determination of Uranium, Thorium, Plutonium, Americium

    The determination of activities of thorium, uranium, plutonium, americium, and curium at very low levels has been performed by a new α liquid scintillation system (PERALS, name registered to

    Published in: Analytical Chemistry · 1997Authors: Nicolas Dacheux · Jean AupiaisAbout: Detection limit · Plutonium · Thorium · Liquid scintillation counting · Angular resolutionChat Online
  • Determination of Uranium and Thorium in the Industrial

    line Lα (Lα1 and Lα2) for the determination of uranium and thorium. The Xray fluorescence was used to determine traces of uranium and thorium in zircon, forming a tablet with 100 mg of zircon (Voldet, 1972), the author has determined the values in the range of 100 to 2000 ppm of uranium and 100 to 300 ppm of thorium in rocks zircon of

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  • Determination of thorium, uranium, and potassium elemental

    Determination of thorium, uranium, and potassium elemental concentrations in surface soils in Cyprus Michalis Tzortzis and Haralabos Tsertos* Department of Physics, University of Cyprus, P.O. Box 20537, 1678 Nicosia, Cyprus. (Revised version: 8/03/2004) Abstract A comprehensive study was conducted to determine thorium, uranium and potassium

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  • DETERMINATION FOR LEVELS OF RADIONUCLIDES OF

    the dry season while Uranium, Thorium and Potassium were beyond the limit of detection during the wet season The EDXRF technique showed that 31.40۪.14 ppm of Potassium was present in algae during dry the season. Uranium, Thorium and Potassium were beyond detection limit in the water samples using EDXRF.

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  • Radium, thorium and radioactive lead isotopes in

    Radium, thorium and radioactive lead isotopes in groundwaters: Appliion to the in situ determination of adsorption‐desorption rate constants and retardation factors S.

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  • Determination of uranium, thorium and plutonium isotopes

    Determination of uranium, thorium and plutonium isotopes by ICPMS showed that the thorium content in uranium was (59.3۪.1) μg∙g1, the expanded factor (k) was 2, and the confidence was

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  • DEVELOPING AN EFFICIENT METHOD FOR THE

    and/or radium from the same sample as uranium and thorium are. References Dacheux, N. Aupiais, J. "Determination of uranium, thorium, plutonium, americium, and curium ultratraces by photon electron rejecting Æ liquid scintillationAnal" . Chem. 1997, 69 (13), 22752282.

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  • Determination of uranium and thorium in zircon by energy

    An energy dispersive Xray fluorescence method has been developed for the determination of uranium and thorium in zircon, using synthetic powder standards containing uranium and thorium in

    Authors: V Natarajan · N K Porwal · S V GodboleAbout: Zircon · Uranium · ThoriumChat Online
  • Determination of uranium, thorium and potassium contents

    the vicinity of thoriumrich pegmatite and veins. The concentration in uranium and thorium can vary from 10 to 12 wt% but can be as high as 26.4% in uraniumand thorium rich monazite [2, 5–7]. There were many studies focusing on the exploration of radioactive anomalies in Yemen, which is mainly loed on the Southwest of the Arabian Peninsula.

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  • U.S. EPA URANIUM AND THORIUM MILL TAILINGS

    2 Background EPA is reviewing and potentially revising its regulations for uranium and thorium milling 40 CFR Part 192 issued under authority of Uranium Mill Tailings Radiation Control Act. Establishes health and environmental protection standards utilized by the NRC and its Agreement States,

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  • A titrimetric method for the sequential determination of

    determination of thorium and uranium can be carried out with a precision and accuracy of better than_ _+ 0.15% for thorium at 10 mg level and uranium ranging from 5 mg to 20 rag.

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  • A Rapid Method for Determination of Uranium, Americium

    A Rapid Method for Determination of Uranium, Americium, Plutonium and Thorium in Soils Samples Serdeiro, N.H. and Marabini, S. Presentado en: 11th International Congress on the International Radiation Protection Association. Madrid, España, 2328 mayo 2004

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  • (PDF) Determination of uranium and thorium using gamma

    uranium ore activit y in Brazil were ana lyzed. The efficiency curve determined in [5 ] was used for quantifying the amount of uranium, tho rium and potassium in both samples.

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  • Solvent extraction method for determination of thorium in

    BS>The analytical separation of trace amounts of uranium by solvent extraction has been investigated, with particular reference to the determination of U//sup 233/in irradiated thorium. The methods that have been evolved are applicable to the separation of uranium from many other elements under appropriate conditions.

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  • Determination of uranium235, uranium238 and thorium232

    Inductively coupled plasma mass spectrometry (ICPMS) is a very useful method for the determination of longlived isotopes of uranium, thorium and other elements.This study investigates parameters for measurement of isotopes of these elements in human urine using a magnetic sector ICPMS method and a previously established quadrupole ICPMS method. The investigation was performed by means of

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  • ASTM C1345 08 Standard Test Method for Analysis of Total

    This test method covered the measurement of total uranium (U) and thorium (Th) concentrations in soils, as well as the determination of the isotopic weight percentages of 234 U, 235 U, 236 U, and 238 U, thereby allowing for the calculation of individual isotopic uranium activity or total uranium activity.

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  • Uranium–thorium dating Wikipedia

    Uranium–thorium dating, also called thorium230 dating, uraniumseries disequilibrium dating or uraniumseries dating, is a radiometric dating technique established in the 1960s which has been used since the 1970s to determine the age of calcium carbonate materials such as speleothem or coral.

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  • Determination of Lanthanides, Thorium, Uranium and

    An HPLC method is presented for the separation and determination of lanthanides (Lns), thorium (Th), uranium (U) and plutonium (Pu) from irradiated (Th, Pu)O 2 . Individual separation of Lns, Th, U and Pu is a challenging task because of

    Authors: Pranaw Kumar · P G Jaison · Vijay M Telmore · Sumana Paul · Suresh K AggarwalAbout: Highperformance liquid chromatography · LanthanideChat Online
  • Determination of lead, uranium, thorium, and thallium in

    A set of four standard glasses has been prepared which have been doped with 61 different elements at the 500, 50, 1, and 0.02ppm level. The concentrations of lead, uranium, thorium, and thallium have been determined by isotope dilution mass spectrometry at a number of points in each of the glasses.

    Published in: Analytical Chemistry · 1973Authors: I L Barnes · E L Garner · J W Gramlich · L J Moore · T J Murphy · L A MachlanAbout: Mass spectrometry · Isotope dilutionChat Online
  • Standard Test Method for Analysis of Total and Isotopic

    1.1 This test method covers the measurement of total uranium (U) and thorium (Th) concentrations in soils, as well as the determination of the isotopic weight percentages of 234 U, 235 U, 236 U, and 238 U, thereby allowing for the calculation of individual isotopic uranium activity or total uranium

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  • 36: Uranium Thorium dating

    UraniumThorium clockwork UraniumThorium dating is an absolute dating technique which uses the properties of the radioactive halflife of the two alpha emitters 238U and 230Th. The halflife of 238U is T 1/2=4,470,000,000 y. The halflife of 230Th is comparably short, only T 1/2=75,380 y. When the amounts of uranium

    Authors: Andrea DuttonAffiliation: University of FloridaAbout: Uraniumthorium datingChat Online
  • Determination of uranium and thorium in solar salts by

    K. OGIWARA et al.: DETERMINATION OF URANIUM AND THORIUM Results and discussion The uranium and thorium of the solar salts determined in the present work are summarized in Table 3. For the Qingdao salt, the determined values in soluble and insoluble parts are also shown individually.

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  • 3.8. Uranium Thorium dating

    UraniumThorium clockwork UraniumThorium dating is an absolute dating technique which uses the properties of the radioactive halflife of the two alpha emitters 238U and 230Th. The halflife of 238U is T 1/2=4,470,000,000 y. The halflife of 230Th is comparably short, only T 1/2=75,380 y. When the amounts of uranium

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  • Quantitative Determination of Thorium and Uranium in

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    Published in: Analytical Chemistry · 1955Authors: George Pish · A A HuffmanAbout: Uranium · Organic compound · Chemistry · Spectrometer · Thorium · FluorescenceChat Online
  • Determination of uranium and thorium in semiconductor

    determination of uranium and thorium in the materials studied in the preset work in which over 170 samples have been analyzed. Uranium in many of the aluminumcopper alloys containing the higher leve] of uranium and thorium was determined by both delayedneutron counting and

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  • Uranium and Thorium Determination in Water Samples Taken

    Uranium and Thorium Determination in Water Samples Taken along River Kura 82 Uranium and thorium was determined at the mass numbers of 238 and 232 respectively using Bi209 as internal standard. The main purpose of the study is to measure the level of uranium and thorium in water samples taken along river Kura. 2. Materials and Methods

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  • Determination of 210Po and uranium in high salinity water

    A method for the determination of uranium and 210 Po in high salinity water samples has been elaborated. Both radionuclides are preconcentrated from 0.5 dm 3 saline media by coprecipitation with hydrated manganese dioxide, followed by dissolution of the precipitate in 200 mL of 1 M HCl.

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