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Reactions to Achieve Mass-spectrometric Discrimination in Simultaneous Plutonium-isotope Speciation with Inductively Coupled Plasma-Tandem Mass SpectrometryMatsueda, Makoto; Kawakami, Tomohiko*; Koarai, Kazuma; Terashima, Motoki; Fujiwara, Kenso; Iijima, Kazuki; Furukawa, Makoto*; Takagai, Yoshitaka*
Chemistry Letters, 51(7), p.678 - 682, 2022/07
Times Cited Count：5 Percentile：61.39(Chemistry, Multidisciplinary)New methodology for a simultaneous isotope speciation of various Pu isotopes without complicated isobaric interferences is developed by using inductively coupled plasma-mass spectrometry (ICP-MS). In analyzing ICP tandem MS (ICP-MS/MS), CO gas reactions in a dynamic reaction cell (DRC) almost eliminated the background noise intensity produced by isobaric interference from isotopes originating from actinides such as Am, Cm, and U at the locations (m/z) of significant Pu isotopes (
Pu, 
Pu, 
Pu, 
Pu, 
Pu).
Sr using 
Sr/
Sr isotope dilution methodYanagisawa, Kayo*; Odashima, Mizuki*; Matsueda, Makoto; Furukawa, Makoto*; Takagai, Yoshitaka*
Talanta, 244, p.123442_1 - 123442_7, 2022/07
Times Cited Count：3 Percentile：46.14(Chemistry, Analytical)The determination of a low concentration of Sr was achieved by the combination of online SPE-ICP-QMS and ID method using Sr/Sr ratio. No requirement of radioactive standard material and the preparation process of the calibration curve was in the quantification process and data acquisition can be in one-shot sample injection. The proposed method allowed the rapid (within 15 min/sample) quantification of Sr in the presence of significant interferences such as isobaric Zr and other elements. The LOD for Sr was 5.6 Bq/L for a 10 mL injection and this could be improved by simply increasing the sample volume injected.
Sr using automatic solid-phase extraction inductively coupled plasma mass spectrometryYanagisawa, Kayo*; Matsueda, Makoto; Furukawa, Makoto*; Takagai, Yoshitaka*
Analytical Sciences, 36(9), p.1131 - 1135, 2020/09
Times Cited Count：4 Percentile：22.67(Chemistry, Analytical)In this paper, we propose an online water infusion system for rapid quantification of radioactive strontium-90 (Sr) with inductively coupled plasma mass spectrometry coupled solid-phase extraction and O dynamic reaction (cascade ICP-MS). The proposed system automatically provides a higher dilution ratio, which is at most 3.3 times the ratio obtained by the previous method, without increasing the analysis time (within 15 min). A detection limit of 2.7 Bq/kg wet (0.54 pg/kg wet) was achieved. The recovery test results were consistent with two different spiked values.
reaction to achieve mass-spectrometric discrimination for Pu isotopic analysis with inductively coupled plasma-mass spectrometryMatsueda, Makoto; Kawakami, Tomohiko*; Koarai, Kazuma; Terashima, Motoki; Fujiwara, Kenso; Iijima, Kazuki; Furukawa, Makoto*; Takagai, Yoshitaka*
no journal, ,
Inductively coupled plasma tandem mass spectrometry with CO gas reactions in a dynamic reaction cell almost eliminated the background noise intensity produced by isobaric interference from isotopes originating from actinides such as Am, Cm, and U at the locations (m/z) of significant Pu isotopes (Pu, Pu, Pu, Pu, and Pu).
Matsueda, Makoto; Kawakami, Tomohiko*; Teruyama, Yuko*; Terashima, Motoki; Iijima, Kazuki; Furukawa, Makoto*; Takagai, Yoshitaka*
no journal, ,
Actinides have a significant radiotoxicity risk of internal exposure to human body due to their emission of high energy alpha particle. An analysis of the actinides is important for safe management of nuclear power plants and radioactive wastes. A traditional method using alpha spectrometry needs a time-consuming and complicated multi-step pretreatment process. Inductively coupled plasma-mass spectrometry (ICP-MS) can potentially realize rapid and simple analytical method by reducing the pretreatment process through combining various automatic chemical separation systems. Such a combination including a hyphenation of chemical instrument and pretreatment system can also be achieved to improve applicability of ICP-MS for simultaneous determination of actinides. In this study, we developed an automatic analytical system of online solid-phase extraction (SPE)-ICP-MS equipped with multi-separation steps of SPE for simultaneous determination of actinides (Th, U, Pu, and Am).
Matsueda, Makoto; Kawakami, Tomohiko*; Teruyama, Yuko*; Terashima, Motoki; Iijima, Kazuki; Furukawa, Makoto*; Takagai, Yoshitaka*
no journal, ,
Determination of actinides (e.g., Th, U, Np, Pu, Am, Cm) in contaminated water and nuclear waste is important for decommissioning the Fukushima Daiichi Nuclear Power Station. However, traditional radiochemical analysis needs a time-consuming process and large effort. ICP-MS has the potential of rapid determination by simultaneous detection of actinides, while many isobaric interferences prevent the quantification. In this study, we developed an automatic analysis method using ICP-MS incorporating cascade separation steps (solid phase separation and gas phase reaction in the dynamic reaction cell) to simultaneously determine actinides.
