Determination of Total and Isotopic Uranium by Inductively Coupled Plasma-mass Spectrometry at the Fernald Environmental Management Project PDF Download
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Author: Publisher: ISBN: Category : Languages : en Pages : 13
Book Description
At the Fernald Environmental Management Project (FEMP) in southwestern Ohio, ICP-mass spectrometry (ICP-MS), with sample introduction by peristaltic pumping, is used to determine total and isotopic uranium (U-234, U-235, U-236 and U-238) in soil samples. These analyses are conducted in support of the environmental cleanup of the FEMP site. Various aspects of the sample preparation and instrumental analysis will be discussed. Initial sample preparation consists of oven drying to determine moisture content, and grinding and rolling to homogenize the sample. This is followed by a nitric/hydrofluoric acid digestion to bring the uranium in the sample into solution. Bismuth is added to the sample prior to digestion to monitor for losses. The total uranium (U-238) content of this solution and the U235/U238 ratio are measured on the first pass through the ICP-MS. To determine the concentration of the less abundant U234 and U236 isotopes, the digestate is further concentrated by using Eichrom TRU-Spec extraction columns before the second pass through the ICP-MS. Quality controls for both the sample preparation and instrumental protocols will also be discussed. Finally, an explanation of the calculations used to report the data in either weight percent or activity units will be given.
Author: Publisher: ISBN: Category : Languages : en Pages : 13
Book Description
At the Fernald Environmental Management Project (FEMP) in southwestern Ohio, ICP-mass spectrometry (ICP-MS), with sample introduction by peristaltic pumping, is used to determine total and isotopic uranium (U-234, U-235, U-236 and U-238) in soil samples. These analyses are conducted in support of the environmental cleanup of the FEMP site. Various aspects of the sample preparation and instrumental analysis will be discussed. Initial sample preparation consists of oven drying to determine moisture content, and grinding and rolling to homogenize the sample. This is followed by a nitric/hydrofluoric acid digestion to bring the uranium in the sample into solution. Bismuth is added to the sample prior to digestion to monitor for losses. The total uranium (U-238) content of this solution and the U235/U238 ratio are measured on the first pass through the ICP-MS. To determine the concentration of the less abundant U234 and U236 isotopes, the digestate is further concentrated by using Eichrom TRU-Spec extraction columns before the second pass through the ICP-MS. Quality controls for both the sample preparation and instrumental protocols will also be discussed. Finally, an explanation of the calculations used to report the data in either weight percent or activity units will be given.
Author: RN. Bolin Publisher: ISBN: Category : Inductively coupled plasma mass spectrometry Languages : en Pages : 12
Book Description
Inductively coupled plasma-mass spectrometry (ICP-MS), using standard sample introduction by peristaltic pumping, is presented as a method to determine total and isotopic uranium (234U, 235U, 236U, and 238U) and thorium (232Th) in soil samples. Initial sample preparation consists of oven drying to determine moisture content, and grinding and mixing the soil to make it homogenous. This is followed by a nitric/hydrofluoric acid digestion to bring the uranium into solution. Bismuth (209Bi) is added prior to digestion to monitor for losses due to sample preparation and analysis. An additional digestion, using nitric/perchloric acid is performed if the total thorium concentration is required on the sample. The uranium and thorium content of this solution and the 235U/238U ratio are measured on an initial pass through the ICP-MS. The total uranium measurement is based on the 238U isotope measurement with correction for the presence of the U isotopes. To determine the concentration of the less abundant 234U and 236U isotopes, the digestate is further concentrated by using a solid phase extraction column (TRUSpec by EiChrom Industries, Inc.) before a second pass through the ICP-MS.
Author: Publisher: ISBN: Category : Power resources Languages : en Pages : 758
Book Description
Semiannual, with semiannual and annual indexes. References to all scientific and technical literature coming from DOE, its laboratories, energy centers, and contractors. Includes all works deriving from DOE, other related government-sponsored information, and foreign nonnuclear information. Arranged under 39 categories, e.g., Biomedical sciences, basic studies; Biomedical sciences, applied studies; Health and safety; and Fusion energy. Entry gives bibliographical information and abstract. Corporate, author, subject, report number indexes.
Author: C. Miller Alexandra Publisher: CRC Press ISBN: 1420004565 Category : Medical Languages : en Pages : 289
Book Description
A compilation of published scientific information, including human, animal, cellular, and theoretical studies, Depleted Uranium: Properties, Uses and Health Consequences provides the most current and comprehensive collection of information on depleted uranium health hazards. The editor and her international panel of contributors are clinical and ba
Author: Zeev Karpas Publisher: CRC Press ISBN: 148222058X Category : Science Languages : en Pages : 328
Book Description
Accurate uranium analysis, and particularly for isotope measurements, is essential in many fields, including environmental studies, geology, hydrogeology, the nuclear industry, health physics, and homeland security. Nevertheless, only a few scientific books are dedicated to uranium in general and analytical chemistry aspects in particular. Analytical Chemistry of Uranium: Environmental, Forensic, Nuclear, and Toxicological Applications covers the fascinating advances in the field of analytical chemistry of uranium. Exploring a broad range of topics, the book focuses on the analytical aspects of industrial processes that involve uranium, its presence in the environment, health and biological implications of exposure to uranium compounds, and nuclear forensics. Topics include: Examples of procedures used to characterize uranium in environmental samples of soil, sediments, vegetation, water, and air Analytical methods used to examine the rigorous specifications of uranium and its compounds deployed in the nuclear fuel cycle Health aspects of exposure to uranium and the bioassays used for exposure assessment Up-to-date analytical techniques used in nuclear forensics for safeguards in support of non-proliferation, including single particle characterization Each chapter includes an overview of the topic and several examples to demonstrate the analytical procedures. This is followed by sample preparation, separation and purification techniques where necessary. The book supplies readers with a solid understanding of the analytical chemistry approach used today for characterizing the different facets of uranium, providing a good starting point for further investigation into this important element.
Author: R. Hearn Publisher: ISBN: Category : Environmental analysis Languages : en Pages : 9
Book Description
Actinide element isotope ratios have been determined in environmental samples using high resolution ICP-MS with ultrasonic nebulisation. Precisions as low as 0.1% RSD have been achieved using various methods of acquisition. The methodology has been used for environmental monitoring of uranium isotope ratios as an indicator of nuclear activity. Also, it has been applied to calcite dating studies as a measure of past geochemical disturbances.
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Author: RN. Bolin
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Author: D. E. Fornwalt
Author: C. Miller Alexandra
Author: Zeev Karpas
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Author: R. Hearn
Author: V. L. Warren