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and O in a reaction cell in triple quadrupole inductively coupled plasma mass spectrometryKazama, Hiroyuki; Konashi, Kenji*; Suzuki, Tatsuya*; Koyama, Shinichi; Maeda, Koji; Sekio, Yoshihiro; Onishi, Takashi; Abe, Chikage*; Shikamori, Yasuyuki*; Nagai, Yasuyoshi*
Journal of Analytical Atomic Spectrometry, 38(8), p.1676 - 1681, 2023/07
Times Cited Count：5 Percentile：60.81(Chemistry, Analytical)Kazama, Hiroyuki; Sekio, Yoshihiro; Maeda, Koji; Koyama, Shinichi; Suzuki, Tatsuya*; Konashi, Kenji*; Abe, Chikage*; Nagai, Yasuyoshi*
no journal, ,
Triple-quadrupole inductively coupled plasma mass spectrometry (ICP-MS/MS) is attractive technique to perform rapid and accurate analysis of fuel debris in Fukushima Daiichi Nuclear Power Plant. The collision/reaction cell technology incorporated in ICP-MS/MS is an available option to eliminate isobaric interferences, being expected to simplify the pretreatment of fuel debris analysis. When fuel debris contains Am and Cm, the pretreatment involving Am/Cm separation is difficult due to similarly chemical behavior of these actinides. In this study, ICP-MS/MS measurements of 
Am and 
Cm injecting CO were carried out. From the obtained results, we suggest candidate conditions to discriminate the isobars of these actinides by use of the differences in their molecular ion formation tendency with variation of CO flow rate.
Kazama, Hiroyuki; Sekio, Yoshihiro; Maeda, Koji; Konashi, Kenji*; Abe, Chikage*; Nagai, Yasuyoshi*; Suzuki, Tatsuya*
no journal, ,
Inductively coupled plasma mass spectrometry with triple quadrupoles (ICP-MS/MS) is one of the promising techniques for rapid and highly sensitive wet analysis of fuel debris in Fukushima Daiichi Nuclear Power Plant. The collision/reaction cell technology implanted in ICP-MS/MS is available option to eliminate isobaric interferences, being expected to simplify the pretreatment of fuel debris analysis. In this study, ICP-MS/MS measurements of 
U and 
Th with collision/reaction gases were performed. On the basis of their gas reactivity, analytical methods for U will be discussed.
Kazama, Hiroyuki; Sekio, Yoshihiro; Maeda, Koji; Koyama, Shinichi; Suzuki, Tatsuya*; Konashi, Kenji*; Abe, Chikage*; Nagai, Yasuyoshi*
no journal, ,
Triple-quadrupole inductively coupled plasma mass spectrometry (ICP-MS/MS) is an attractive technique to perform rapid and highly sensitive analysis. The collision/reaction cell (CRC) technology incorporated in ICP-MS/MS is an available option to eliminate isobaric interference, being expected to discriminate actinide nuclides involved in fuel debris. Meanwhile, in order to discriminate against these isobaric interferences using ICP-MS/MS, it is necessary to understand actinide gas-phase reaction behavior associated with the injection of reaction gases into the CRC. In the present work, the actinide molecular ion formations correlating with the excitation energy from the ground state of actinide monoatomic cation to their reactive state (5f
6d
) were investigated by injection of reaction gases into CRC. The obtained correlations allow us to predict the reaction behaviors towards mutual discrimination of actinide series using ICP-MS/MS.
Kazama, Hiroyuki; Ma, Z.*; Suzuki, Tatsuya*; Konashi, Kenji*; Matsuo, Satoru*; Yoshida, Kenta*; Homma, Yoshiya*; Watanabe, Makoto*; Abe, Chikage*; Suzuki, Katsuya*
no journal, ,
no abstracts in English
Wada, Kazuma; Kazama, Hiroyuki*; Abe, Chikage*; Onishi, Takashi; Yamamoto, Masahiko; Taguchi, Shigeo; Kuno, Takehiko; Maeda, Koji; Idemitsu, Kazuya*; Suzuki, Tatsuya*
no journal, ,
Elemental analysis and isotope ratio analysis of actinides in spent fuel and debris generated in a severe accident can provide valuable information such as burnup. For such analyses, mass spectrometry such as ICP-MS and TIMS are one of the powerful tools. The mass spectrometry requires mutual separation of actinides for the removal of isobaric interferences. In the present study, we developed an actinide separation using polyvinylpolypyrrolidone as a pretreatment for mass spectrometry. The adsorption behavior of actinides was confirmed by batch experiments, and mutual separation were conducted by column method. As results, we confirmed that tetravalent and hexavalent actinides adsorb on polyvinylpolypyrrolidone, but trivalent actinides do not adsorb. We confirmed that trivalent/tetravalent/hexavalent actinides can be separated.
in reaction cell in triple quadrupole inductively coupled plasma mass spectrometryKazama, Hiroyuki; Konashi, Kenji*; Suzuki, Tatsuya*; Sekio, Yoshihiro; Maeda, Koji; Koyama, Shinichi; Abe, Chikage*; Nagai, Yasuyoshi*
no journal, ,
Ultratrace analysis technique is important to understand fuel debris in nuclear reactor core after sever accident. Ion-molecule reactions of actinides (
Np, Am and Cm) in a reaction cell were measured by inductively coupled plasma mass spectrometry (ICP-MS/MS). These nuclides are included in fuel debris. A gas-phase ion-molecule reaction model has been developed to simulate the gas phase reactions in the reaction cell. The results of model simulation are good agreement with the flow rates dependences of experimental data accurately.
