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Bunko Kenkyu, 36(1), p.46 - 50, 1987/01
no abstracts in English
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Bunko Kenkyu, 35(4), p.309 - 321, 1986/00
no abstracts in English
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Shitsuryo Bunseki, 18(4), p.1270 - 1274, 1970/00
no abstracts in English
Okubo, Ayako; Shinohara, Nobuo; Toda, Nobufumi; Kataoka, Osamu; Matsumoto, Tetsuya
no journal, ,
no abstracts in English
Tomita, Ryohei; Esaka, Fumitaka; Miyamoto, Yutaka
no journal, ,
In the previous study, we developed a combination method of particle manipulation and secondary ion mass spectrometry (SIMS) for removing the interferences from other elements in other particles. Since the particles were selected randomly and manipulated, it caused the problem not to cover the range of 
U/
U isotope ratio in the sample. In this study, we improved the procedure of analyzing uranium isotope ratios in individual particles by SIMS to cover the range of U/U in the sample.
Tomita, Jumpei; Tomita, Ryohei; Suzuki, Daisuke; Yasuda, Kenichiro; Miyamoto, Yutaka
no journal, ,
The impact of the uranium from the process blank for a single uranium particle analysis by MC-ICP-MS was evaluated quantitatively. The synthetic uranium particles prepared by impregnating of U (NBL CRM U100) to porous silica were used in this study. A conical-bottom bottle was used to dissolve a uranium particle with a small amount of acid. The amount of U and U/U of the process blank were 0.2 pg and 0.0190, respectively. This ratio was similar to that of CRM U015 (0.0155), which was used for the detector calibration of MC-ICP-MS, indicating that the process blank was derived from ultra-trace level of uranium remining in the desolvator. The analytical results indicated that the U/U ratio could be determined accurately by MC-ICP-MS when the particle contained more than 23 pg of U.
