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Journal Articles

Radioactive wastes

Matsueda, Makoto

Chino To Joho, 35(4), P. 88, 2023/11

Radioactive waste is what contains radioactive materials generated through nuclear activities, radiopharmacy, research and development. The treatment and disposal of the waste are one of the key challenges facing people. This glossary describes the classification of radioactive waste, the challenges and the current efforts of its disposal and current efforts, and so on.

Journal Articles

Application of the Y separation method using DGA resin for the measurement of $$^{90}$$Sr in human teeth and marine fish bones

Koarai, 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 $$^{90}$$Sr in human teeth and seawater fish bones.

Journal Articles

Quantitative imaging of trace elements in solid samples by online isotope dilution laser ablation-inductively coupled plasma-mass spectrometry

Yanagisawa, Kayo; Matsueda, Makoto; Furukawa, Makoto*; Ishiniwa, Hiroko*; Wada, Toshihiro*; Hirata, Takafumi*; Takagai, Yoshitaka*

Analyst, 148(18), p.4291 - 4299, 2023/09

Quantitative imaging of trace elements was successfully performed by online isotope dilution laser ablation inductively coupled plasma mass spectrometry (online LA-ICP-IDMS). The sample aerosols produced by LA are mixed online with the mist created from an isotopically enriched spike solution via an in-house cyclonic spray chamber, which has a gas port on the top. Quantification was continuously achieved in each spot; subsequently, quantitative imaging was realized. Fe and Sr were selected as the model elements, and their spot quantifications based on online-isotope dilution. The method was applied to actual biological hard tissues, and the results were compared with electron probe microanalyzer data.

Journal Articles

Tracking the behavior and characteristics of microplastics using a multi-analytical approach; A Case study in two contrasting coastal areas of Japan

Battulga, B.; Atarashi-Andoh, Mariko; Matsueda, Makoto; Koarashi, Jun

Environmental Science and Pollution Research, 30(31), p.77226 - 77237, 2023/05

 Times Cited Count:0 Percentile:0(Environmental Sciences)

The global survey for the presence of microplastics (MPs) in aquatic environments has attracted widespread scientific attention over the past decade. This study demonstrates a multidimensional analytical approach, including isotopic and thermogravimetric analyses to evaluate characteristics and behavior of MPs in the environment. The MP samples were collected in two contrasting coastal areas of Japan. The $$delta$$$$^{13}$$C values of field-collected polyethylene (PE), polypropylene (PP), and polystyrene (PS) MPs were ranged from -25.6 to -31.4, -23.4 to -30.9, and -27.3 to -28.6 per mil, respectively. The differences in $$delta$$$$^{13}$$C signature between MPs with the same polymer types (i.e., PE and PP) but different colors. Through thermal analysis, the single-step endothermic process was observed for environmental PE and PS-MPs. The results reveal that degradation may play a significant role in the behavior and characteristics of MP debris in the aquatic environment.

Journal Articles

Mass-spectrometric determination of iodine-129 using O$$_{2}$$-CO$$_{2}$$ mixed-gas reaction in inductively coupled plasma tandem quadrupole mass spectrometry

Matsueda, Makoto; Aoki, Jo; Koarai, Kazuma; Terashima, Motoki; Takagai, Yoshitaka*

Analytical Sciences, 38(11), p.1371 - 1376, 2022/11

 Times Cited Count:1 Percentile:17.04(Chemistry, Analytical)

The $$^{129}$$I analysis using ICP-MS is challenging caused by xenon-129 ($$^{129}$$Xe) and $$^{127}$$IH$$_{2}$$ generated from excess stable isotope $$^{127}$$I. In this study, mass discrimination between iodine-129 ($$^{129}$$I) and interfering substances was achieved by inductively coupled plasma-tandem quadrupole mass spectrometry (ICP-MS/MS) with a dynamic reaction cell introduced a mixture gas of O$$_{2}$$ and CO$$_{2}$$. As a result, the ratio of (background noise intensity at m/z 129)/$$^{127}$$I was 3.8 $$times$$ 10$$^{-10}$$ and 10 mBq/L of $$^{129}$$I was analyzed without chemical separation in the presence of 100 mg/L stable $$^{127}$$I. Spiked tests with actual rainwater were performed, and obtained values were agreed with the spiked amounts.

Journal Articles

Development of an analytical method for $$^{90}$$Sr with ICP-MS/MS using O$$_{2}$$ and NH$$_{3}$$ mixed gas reaction

Koarai, Kazuma; Matsueda, Makoto; Terashima, Motoki

KEK Proceedings 2022-2, p.102 - 107, 2022/11

Analytical methods with inductively coupled plasm mass spectrometry (ICP-MS) have been developed for the determination of $$^{90}$$Sr in environmental samples; however, the sensitivity of the ICP-MS methods and removal of interferences are insufficient to measure trace amount of $$^{90}$$Sr in the environmental samples. In this study, we developed an analytical method for $$^{90}$$Sr with ICP-DRC-MS/MS using oxygen and ammonia mixed gas reaction. This analytical method could be applied for measurement of $$^{90}$$Sr in reference soil.

Journal Articles

Performance evaluation of commercial scintillation cocktails for low-level tritium counting by high-capacity liquid scintillation counter

Kuwata, Haruka*; Tazoe, Hirofumi*; Kranrod, C.*; Fujiwara, Kenso; Terashima, Motoki; Matsueda, Makoto; Hirao, Shigekazu*; Akata, Naofumi*

Radiation Protection Dosimetry, 198(13-15), p.1014 - 1018, 2022/09

 Times Cited Count:0 Percentile:0.01(Environmental Sciences)

Journal Articles

Using CO$$_{2}$$ Reactions to Achieve Mass-spectrometric Discrimination in Simultaneous Plutonium-isotope Speciation with Inductively Coupled Plasma-Tandem Mass Spectrometry

Matsueda, 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:2 Percentile:63.98(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$$_{2}$$ 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 ($$^{239}$$Pu, $$^{240}$$Pu, $$^{241}$$Pu, $$^{242}$$Pu, $$^{244}$$Pu).

Journal Articles

Online solid-phase extraction-inductively coupled plasma-quadrupole mass spectrometric quantification of $$^{90}$$Sr using $$^{88}$$Sr/$$^{86}$$Sr isotope dilution method

Yanagisawa, Kayo*; Odashima, Mizuki*; Matsueda, Makoto; Furukawa, Makoto*; Takagai, Yoshitaka*

Talanta, 244, p.123442_1 - 123442_7, 2022/07

 Times Cited Count:1 Percentile:17.04(Chemistry, Analytical)

The determination of a low concentration of $$^{90}$$Sr was achieved by the combination of online SPE-ICP-QMS and ID method using $$^{88}$$Sr/$$^{86}$$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 $$^{90}$$Sr in the presence of significant interferences such as isobaric $$^{90}$$Zr and other elements. The LOD for $$^{90}$$Sr was 5.6 Bq/L for a 10 mL injection and this could be improved by simply increasing the sample volume injected.

Journal Articles

Improvement of ICP-MS measurement method for $$^{90}$$Sr in hard tissue samples

Koarai, Kazuma; Matsueda, Makoto; Aoki, Jo; Yanagisawa, Kayo*; Fujiwara, Kenso; Terashima, Motoki

KEK Proceedings 2021-2, p.140 - 145, 2021/12

Strontium-90 and $$^{90}$$Y, its daughter nuclide, adverse effects on the bone marrow. Monitoring of $$^{90}$$Sr in the bones have been required after the Fukushima-Daiichi Nuclear Power Plant accident. However, conventional radioactivity measurement method for $$^{90}$$Sr requires a complicated separation of $$^{90}$$Y and a time-consuming measurement. ICP-MS system has been applied to $$^{90}$$Sr concentration survey of water, soil, and edible part of fish. We developed measurement method of $$^{90}$$Sr with ICP-MS and applied the method for cattle bones. We determined $$^{90}$$Sr in the hard tissues of animals that collected in the Fukushima prefecture. Limit of detection in the measurement was 19 Bq/kg.

Journal Articles

Rapid analysis of $$^{90}$$Sr in cattle bone and tooth samples by inductively coupled plasma mass spectrometry

Koarai, Kazuma; Matsueda, Makoto; Aoki, Jo; Yanagisawa, Kayo*; Terashima, Motoki; Fujiwara, Kenso; Kino, Yasushi*; Oka, Toshitaka; Takahashi, Atsushi*; Suzuki, Toshihiko*; et al.

Journal of Analytical Atomic Spectrometry, 36(8), p.1678 - 1682, 2021/08

 Times Cited Count:3 Percentile:57.04(Chemistry, Analytical)

Rapid analysis of $$^{90}$$Sr in bone and tooth samples of cattle were achieved by an inductively coupled plasma mass spectrometry (ICP-MS) coupled with mass shift and solid phase extraction techniques. Limit of detection (LOD) in the ICP-MS measurement of 0.1 g samples was lower than that of the radioactivity measurement. Analytical time of the ICP-MS method was reduced from 20 days to 11 hours, compared with the radiometric method. Therefore, the ICP-MS method can be rapid and useful procedure of $$^{90}$$Sr in small bone and tooth samples derived from terrestrial animals.

Journal Articles

Online solid-phase extraction-inductively coupled plasma-quadrupole mass spectrometry with oxygen dynamic reaction for quantification of technetium-99

Matsueda, Makoto; Yanagisawa, Kayo*; Koarai, Kazuma; Terashima, Motoki; Fujiwara, Kenso; Abe, Hironobu; Kitamura, Akihiro; Takagai, Yoshitaka*

ACS Omega (Internet), 6(29), p.19281 - 19290, 2021/07

 Times Cited Count:1 Percentile:7.13(Chemistry, Multidisciplinary)

Online solid-phase extraction-inductively coupled plasma-quadrupole mass spectrometry with oxygen dynamic reaction cell (online SPE-ICP-MS-DRC) was shown to be a thorough automatic analytical system, circumventing the need for human handling. At three stepwise separations (SPE-DRC-Q mass filters), we showed that interference materials allowed the coexistence of abundance ratios of 1.5$$times$$10$$^{-13}$$ for $$^{99}$$Tc/Mo. Using this optimized system, a detection limit of $$^{99}$$Tc was 9.3 pg/L (5.9 mBq/L) for a 50 mL injection and sequential measurements were undertaken at a cycle of 24 min/sample.

JAEA Reports

Development of solid-phase extraction technique for ICP-MS analysis of iodine-129 in environmental samples; Comparative study of anion-exchange and silver ion-supported resins on isolation of Iodine-129 from interference elements

Aoki, Jo; Matsueda, Makoto; Koarai, Kazuma; Terashima, Motoki; Fujiwara, Kenso; Abe, Hironobu

JAEA-Research 2021-002, 20 Pages, 2021/05

JAEA-Research-2021-002.pdf:2.75MB

In order to analyze extremely low concentrations of $$^{129}$$I in environmental samples by ICP-MS with high sensitivity and rapidity, it is necessary to remove interfering elements (Na, Mg, K, Ca, Mo, Cd and In) using a pretreatment method with Solid-phase Extraction Resin. Anion Exchange Resins with amino groups have been widely used as Solid-phase Extraction Resins, while Ag+ Supported Resins have also been widely used in recent years. It is necessary to optimize the pretreatment technique based on characteristics of the resins. In this study, we compared in terms of separation of I from matrix elements (Na, Mg, K, Ca, Mo, Cd and In) for DOWEX1-X8, AG 1-X8 and CL Resin, and investigated their suitability for ICP-MS analysis of $$^{129}$$I in environmental samples. The results of adsorption and elution experiments showed that all resins examined uptake and elute I quantitatively. CL Resin showed the highest removal performance of interfering elements, with 3.1% of Mo remaining, but other interfering elements were removed below the detection limit of ICP-MS. However, the Mo remained after the CL Resin treatment could interfere the ICP-MS measurement of $$^{129}$$I, based on the consideration of ratio of $$^{129}$$I and Mo. The eluate from CL Resin was treated with a Cation exchange resin (DOWEX 50WX8). As a result, Mo in the eluate was removed by up to 98% and the interference from Mo was reduced to measurable level. Therefore, the pretreatment method using CL Resin in combination with DOWEX 50WX8 is effective for ICP-MS analysis of $$^{129}$$I at extremely low concentrations (background level).

Journal Articles

Progress of analytical chemistry through the experience of the Fukushima Daiichi Nuclear Power Plant Accident

Matsueda, Makoto; Takagai, Yoshitaka*

Bunseki, 2021(4), p.160 - 161, 2021/04

no abstracts in English

Journal Articles

Applicability of Sr resin for ICP-MS measurement of $$^{90}$$Sr in hard tissue samples

Koarai, Kazuma; Matsueda, Makoto; Aoki, Jo; Yanagisawa, Kayo*; Fujiwara, Kenso; Terashima, Motoki; Kitamura, Akihiro; Abe, Hironobu

KEK Proceedings 2020-4, p.180 - 185, 2020/11

Strontium-90 and $$^{90}$$Y, its daughter nuclide, adverse effects on the bone marrow. Monitoring of $$^{90}$$Sr in the bones have been required after the Fukushima-Daiichi Nuclear Power Plant accident. However, conventional radioactivity measurement method for $$^{90}$$Sr requires a complicated separation of $$^{90}$$Y and a time-consuming measurement. ICP-MS system has been applied to $$^{90}$$Sr concentration survey of water, soil, and edible part of fish. We applied the ICP-MS system for the bones for the first time. In this study, reference bone (JSAC 0785 fish bone) was used as measurement samples. Sample preparation of the bone was performed using a microwave digestion instrument. After sample preparation, $$^{90}$$Sr was determined using ICP-MS system with cascade separation steps based on on-line column separation and oxygen reaction. Strontium-90 in the bones was successfully separated from Ca, Ba, Y, Zr, Fe, Se, and Ge, which interfered in ICP-MS measurement, in the separation steps.

Journal Articles

Improvement of adsorption performances of Sr adsorption fiber and investigation for realizing simple $$^{90}$$Sr analysis

Horita, Takuma; Asai, Shiho*; Konda, Miki; Matsueda, Makoto; Hanzawa, Yukiko; Kitatsuji, Yoshihiro

Bunseki Kagaku, 69(10/11), p.619 - 626, 2020/10

 Times Cited Count:0 Percentile:0(Chemistry, Analytical)

We have developed a Sr adsorption fiber for rapid analysis of $$^{90}$$Sr. The prepared Sr adsorption fiber has a Sr-extraction layer that densely retains a Sr-selective extractant, an 18-crown-6 ether derivative, on the fiber surface. Hydrophobic group-containing polymer chains embedded onto the surface of the fiber allow to form a hydrophobic phase, incorporating Sr-selective extractants. This unique surface structure provides high adsorption capacity, leading to rapid and highly efficient adsorption of Sr$$^{2+}$$. The adsorption capacity of the Sr adsorption fiber was 3 times higher than commercially available 18-crown-6 ether derivative-impregnated resin (Sr Resin). The equilibrium adsorption capacity of the Sr adsorption fiber was comparable to the Sr Resin. The retained $$^{90}$$Sr was finally determined by a GM counter. The total analysis time including the Sr adsorption and measurement was about 1 hour.

Journal Articles

Development of online dilution system for quantification of $$^{90}$$Sr using automatic solid-phase extraction inductively coupled plasma mass spectrometry

Yanagisawa, Kayo*; Matsueda, Makoto; Furukawa, Makoto*; Takagai, Yoshitaka*

Analytical Sciences, 36(9), p.1131 - 1135, 2020/09

 Times Cited Count:4 Percentile:23.3(Chemistry, Analytical)

In this paper, we propose an online water infusion system for rapid quantification of radioactive strontium-90 ($$^{90}$$Sr) with inductively coupled plasma mass spectrometry coupled solid-phase extraction and O$$_{2}$$ 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.

Journal Articles

Radioactive strontium measurement using ICP-MS following cascade preconcentration and separation system

Takagai, Yoshitaka*; Furukawa, Makoto*; Kameo, Yutaka; Matsueda, Makoto; Suzuki, Katsuhiko*

Bunseki Kagaku, 66(4), p.223 - 231, 2017/04

 Times Cited Count:5 Percentile:19.16(Chemistry, Analytical)

no abstracts in English

Journal Articles

Development of metal corrosion testing method simulating equipment of reprocessing of spent nuclear fuels

Matsueda, Makoto; Irisawa, Eriko; Kato, Chiaki; Matsui, Hiroki

Proceedings of 54th Annual Meeting of Hot Laboratories and Remote Handling (HOTLAB 2017) (Internet), 4 Pages, 2017/00

In the PUREX method, spent fuels are dissolved with nitric acid media. The reprocessing solution containing Fission Products derived from spent fuels is very corrosive to metal materials, the corrosion problem often appears on the surface stainless steel devices. The oxidizing metal ions such as Ruthenium (Ru) and Neptunium (Np) in the process solution is the key reason for severe corrosion of stainless steel. In order to obtain the corrosion rate of stainless steel, we installed the corrosion test apparatus inside an airtight concrete cell in a hot laboratory (the WAste Safety TEsting Facility (WASTEF) of the Japan Atomic Energy Agency), and performed the corrosion tests of stainless steel in the heated nitric acid solution containing Np. The corrosion tests were performed in the temperature range from room temperature to boiling point for 500 hours per batch. The results show that the presence of Np accelerate the stainless steel corrosion in the nitric acid solution.

Oral presentation

Development of in-situ analytical method of $$^{90}$$Sr in contaminated water using Sr adsorptive fiber

Konda, Miki; Horita, Takuma; Asai, Shiho; Matsueda, Makoto; Hanzawa, Yukiko; Saito, Kyoichi*; Fujiwara, Kunio*; Sugo, Takanobu*; Kameo, Yutaka

no journal, , 

no abstracts in English

57 (Records 1-20 displayed on this page)