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Morii, Shiori; Yomogida, Takumi; Asai, Shiho*; Ouchi, Kazuki; Oka, Toshitaka; Kitatsuji, Yoshihiro
KEK Proceedings 2023-2, p.132 - 137, 2023/11
New analytical method of a combination of laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) and isotope dilution mass spectrometry (IDMS) for quantification of Zr isotopes in a solid sample was investigated. Solid Zr-isotope reference was added to a simulated radioactive waste sample as a spike, then Zr isotope ratio was measured by LA-ICP-MS. As a result, we successfully quantify Zr isotopes in the simulated radioactive waste sample by new IDMS. There is a possibility that this new method can be applied for quantification of Zr-93 in difficult to dissolve radioactive wastes.
Yokoyama, Hiroya; Maehara, Yushi; Fujita, Hiroki; Takada, Chie
KEK Proceedings 2023-2, p.126 - 131, 2023/11
no abstracts in English
Irisawa, Ayumi*; Sakuma, Kazuyuki; Takeuchi, Yukio*; Taniguchi, Keisuke*; Onda, Yuichi*
KEK Proceedings 2023-2, p.29 - 33, 2023/11
no abstracts in English
Sr in human teeth and marine fish bonesKoarai, Kazuma; Matsueda, Makoto; Aoki, Jo; Terashima, Motoki
KEK Proceedings 2023-2, p.155 - 160, 2023/11
In this presentation, we report the results of the application of the Y-separation method using DGA resin to the determination of Sr in human teeth and seawater fish bones.
Ouchi, Kazuki; Naito, Sho*; Hiruma, Yusuke*; Minowa, Kazuki*; Kitatsuji, Yoshihiro
no journal, ,
We attempted to downsize the pretreatment of separation process to reduce the risk of radiation exposure in radioactive waste analysis. The geometry (inner diameter and length) for separation was investigated to design a micro tube column packed with UTEVA resin as a selective solid-phase extractant for uranium. It was found that the uranium adsorption rate depended on the inner diameter and length, and the column volume could be downsized to 4 
L.
Abe, Tomohisa; Yoshimura, Kazuya; Funaki, Hironori; Nakanishi, Takahiro; Ochiai, Shinya*; Nagao, Seiya*
no journal, ,
no abstracts in English
Tomita, Ryohei; Tomita, Jumpei; Suzuki, Daisuke; Yasuda, Kenichiro; Miyamoto, Yutaka
no journal, ,
Uranium standard particles are necessary to calibrate instruments and mass bias effect for analyzing isotopic ratio of uranium particles in secondary ion mass spectrometry (SIMS). In this study, we tried to make uranium particles which contain several picograms of uranium from porous silicon particles and solution of uranium standard powder (CRM U100). Quality of handmade uranium particles were evaluated by isotopic ratio analysis by Large Geometry (LG)-SIMS and mass bias factor calculated from handmade particles compared with the factor calculated from U100 particles. 
U atom% of handmade particles agreed with certified value of U100 within standard error (2
). However, mass bias factor calculated from handmade particles disagreed with the factor calculated from U100 particles. It is possible that electrification and uranium chemical form of handmade particles affect mass bias effect.
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.
