The technique of sample handling for uranium in machine oil was introduced by burning, nitric acid and vitriol. The effects of separations were analyzed by isotope dilution mass spectrum (IDMS). The effect of separati...The technique of sample handling for uranium in machine oil was introduced by burning, nitric acid and vitriol. The effects of separations were analyzed by isotope dilution mass spectrum (IDMS). The effect of separation by vitriol and nitric acid are better than that by burning. Vitriol can carbonize oil better.展开更多
The measurement method of uranium content was studied by use of natural uranium as spike. Uranium content in the NBS-90 was analyzed. The results were agreeement with the reference standard velves and the relatively e...The measurement method of uranium content was studied by use of natural uranium as spike. Uranium content in the NBS-90 was analyzed. The results were agreeement with the reference standard velves and the relatively expanded uncertainty is less than 0. 50% in 95% confidence level.展开更多
Effect factors of measurement of low abundance isotope were researched. The deduction of dynamic background was applied to the measurement of low abundant uranium isotope ratios using thermal ionization mass spectrome...Effect factors of measurement of low abundance isotope were researched. The deduction of dynamic background was applied to the measurement of low abundant uranium isotope ratios using thermal ionization mass spectrometer with multi-detector. The results showed that relative standard uncertainty of the low abundant isotopic measurementd ecreased about 50%.展开更多
文摘The technique of sample handling for uranium in machine oil was introduced by burning, nitric acid and vitriol. The effects of separations were analyzed by isotope dilution mass spectrum (IDMS). The effect of separation by vitriol and nitric acid are better than that by burning. Vitriol can carbonize oil better.
文摘The measurement method of uranium content was studied by use of natural uranium as spike. Uranium content in the NBS-90 was analyzed. The results were agreeement with the reference standard velves and the relatively expanded uncertainty is less than 0. 50% in 95% confidence level.
文摘Effect factors of measurement of low abundance isotope were researched. The deduction of dynamic background was applied to the measurement of low abundant uranium isotope ratios using thermal ionization mass spectrometer with multi-detector. The results showed that relative standard uncertainty of the low abundant isotopic measurementd ecreased about 50%.
