The accurate analysis of trace element impurities in uranium materials has been identified as a high priority in the nuclear forensic community. Uranium impurity analyses are being conducted on a routine basis worldwide, however, the current methodologies lack precision. These methods typically employ matrix matched external calibration standards, which yield relative uncertainties of +/-10% or greater. In addition, the methods suffer from matrix effects, isobaric interferences and the lack of matrix specific reference standards certified for the comprehensive list of analytes being measured. By using high pressure liquid chromatography (HPLC) combined with isotope dilution mass spectrometry, the influence of the matrix and isobaric interferences can be significantly reduced while providing an accurate and precise concentration determination. The HPLC technique, together with ICPMS instrumentation allows for trace element analysis with low relative uncertainties, <1% for single detector mass spectrometers to as low as 0.1% for multi-detector mass spectrometers.

High precision determination of trace element impurities in a uranium matrix using high pressure liquid chromatography and isotope dilution mass spectrometry

245th National Meeting (2013)

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