STP698

    Collaborative Study of a Tentative Standard Method for the Determination of Uranium in Water

    Published: Jan 1980


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    Abstract

    A procedure for the determination of uranium isotopes in water has been developed at Mound Facility. The procedure consists of coprecipitation of uranium with ferrous hydroxide, a nitric-hydrofluoric acid dissolution if the sample contains sediment, separation of the uranium by anion exchange in hydrochloric acid, electrodeposition, and alpha pulse height analysis. After a single-laboratory evaluation at Mound, the present procedure was collaboratively tested by seven other laboratories. A copy of the procedure and four water samples, ranging from 1 to 2000 disintegrations per minute (dpm) of uranium per litre of water, were sent to the participating laboratories. Two of these samples were taken from actual effluents discharged to the environment and the third was a spiked “substitute ocean water” sample. The fourth sample contained “diluted pitchblende ore” of a known uranium concentration added to a litre of deionized water. Data from the seven collaborating laboratories have been evaluated. The average uranium concentrations determined by these laboratories agreed with the reference values to within 5 percent, and the average tracer recovery was 70 percent. The precision of the results approached counting statistics error for the three water samples which did not contain sediment.

    Keywords:

    radiation, environments, uranium isotopes, water, sediments, alpha particle spectroscopy, anion exchanging, electrodeposition


    Author Information:

    Casella, VR
    Senior analytical chemist, environmental evaluation supervisor, and analytical technician, Monsanto Research Corp., Miamisburg, Ohio

    Bishop, CT
    Senior analytical chemist, environmental evaluation supervisor, and analytical technician, Monsanto Research Corp., Miamisburg, Ohio

    Glosby, AA
    Senior analytical chemist, environmental evaluation supervisor, and analytical technician, Monsanto Research Corp., Miamisburg, Ohio


    Paper ID: STP35106S

    Committee/Subcommittee: D19.04

    DOI: 10.1520/STP35106S


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