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ORIGINAL ARTICLE
Year : 2012  |  Volume : 35  |  Issue : 2  |  Page : 77-79

Estimation of uranium isotope in urine samples using extraction chromatography resin


1 Health Physics Laboratory, GSO Complex, Bhabha Atomic Research Centre, Tarapur, India
2 Internal Dosimetry Section, Health Physics Division BARC, Trombay, Mumbai, Maharashtra, India

Correspondence Address:
Devender Rao
Internal Dosimetry Section, Health Physics Division BARC, Trombay, Mumbai - 400 094
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/0972-0464.112345

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Introduction: Internal exposure monitoring for alpha emitting radionuclides is carried out by bioassay samples analysis. For occupational radiation workers who handle uranium in reprocessing or fuel fabrication facilities, there exist a possibility of internal exposure and urine assay is the preferred method for monitoring such exposure. Materials and Methods: Separation of Uranium is carried out by extraction chromatography using diamyl amyl phosphonate (U/TEVA) resin. This resin contains diamyl amyl phosphonate extractant supported on inert Amberlite XAD-7 (an acrylic ester) resin.The electrodeposited samples are counted using octet alpha spectrometery. Results and Discussion: The analysis time involved from sample loading to stripping is 2 h compared with the 3.5 h involved in conventional ion exchange method. The radiochemical yield was found in the range of 69-91%. Minimum detectable activity for uranium estimation for 3,60,000 s counting time at an average percentage recovery of 82 ΁ 8 works out to 0.21 mBq/d. Conclusion: The technique gives good and consistent radiochemical yield of 82% on repeated use of the chromatographic column when compared with ion exchange technique. Analysis time involved from sample loading to stripping using UTEVA is 2 h compared with the time involved of 3.5 h by the conventional ion exchange method.


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