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Report No.
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The Use of solution nebulization ICP-MS combined with particle screening and micro-sampling for analysis of individual uranium-bearing particles

Esaka, Fumitaka ; Magara, Masaaki ; Kimura, Takaumi 

A fission track technique and automated particle measurement (APM) were used as particle screening methods to select uranium containing particles, prior to the ICP-MS analysis. In the ICP-MS combined with the fission track technique, the uranium isotope abundance ratios were successfully determined for individual particles with diameters ranging from 1.2 to 2.4 $$mu$$m in a certified reference material. The analysis of the real inspection swipe sample gave the $$^{235}$$U/$$^{238}$$U isotope abundance ratios between 0.0246 and 0.0376. When the APM was used as the particle screening method for the real inspection swipe sample, the $$^{235}$$U/$$^{238}$$U isotope abundance ratios ranging from 0.0259 to 0.0432 were obtained. From these result, it is indicated that the performance of APM to identify uranium containing particles with higher $$^{235}$$U abundance is greater than that of the fission track technique.

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