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A gravimetric and an X-ray fluorescence method for the determination of rubidium in Rb2U(SO4)3

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Abstract

Chemical characterization of rubidium uranium(IV) trisulfate, Rb2U(SO4)3, a new chemical assay standard for uranium requires accurate analysis of rubidium. A gravimetric and an X-ray fluorescence method (XRF) for the determination of rubidium in this compound are described. In the gravimetric method, rubidium is determined as Rb2Na[Co(NO2)6].H2O without separating uranium with a precision of the order of ±0.5%. In the XRF method, the concentration ratio of rubidium to uranium, CRb/CU, is determined in the solid samples by the binary ratio method using calibration between intensity ratios (IRb/IU) and concentration ratios (CRb/CU). The concentration of rubidium is derived using the uranium value which is known with a precision better than ±0.05%. The XRF method has a precision better than ±0.8% for rubidium determination.

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References

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Authors and Affiliations

  1. Fuel Chemistry Division, Bhabha Atomic Research Centre, Trombay, 400 085, Bombay, India

    K. D. Singh Mudher, K. Krishnan & N. C. Jayadevan

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  1. K. D. Singh Mudher
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  2. K. Krishnan
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  3. N. C. Jayadevan
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Singh Mudher, K.D., Krishnan, K. & Jayadevan, N.C. A gravimetric and an X-ray fluorescence method for the determination of rubidium in Rb2U(SO4)3 . Journal of Radioanalytical and Nuclear Chemistry Letters 176, 175–184 (1993). https://doi.org/10.1007/BF02163198

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  • DOI: https://doi.org/10.1007/BF02163198

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