Development of boron isotopic composition analysis method using SIMS and its application to geochemical cycle studies
| Project/Area Number |
18540481
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Geochemistry/Astrochemistry
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| Research Institution | The University of Tokyo |
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Principal Investigator |
AMAKAWA Hiroshi The University of Tokyo, Ocean Research Institute,, Associate Professor (60260519)
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| Co-Investigator(Kenkyū-buntansha) |
TAKAHATA Naoto Ocean Research Institute, 海洋研究所, Assistant Professor (90345059)
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| Project Period (FY) |
2006 – 2007
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| Project Status |
Completed (Fiscal Year 2007)
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| Budget Amount *help |
¥3,800,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥300,000)
Fiscal Year 2007: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2006: ¥2,500,000 (Direct Cost: ¥2,500,000)
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| Keywords | boron / isotopic composition / SIMS / standard sample / NIST 951 / condensation of atmosphere / seawater / hot sprine water / 大気 / NTIMS |
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| Research Abstract |
We tried to develop a method for determining boron isotopic composition of solution sample using secondary ion mass spectrometer (SIMS) and applied it to a standard sample, i. e., NIST 951 and such natural samples as seawater, hot spring waters and condensation of atmospheric sample.
The solution samples were dried on silicon wafer by an infrared lamp for SIMS (NanoSIMS) analysis. During drying of the samples, previous studies have recommended an addition of boron-free seawater for suppressing loss of boron in the samples. However, our study indicates that the addition of boron-free seawater to NIST 951 standard and hot spring samples apparently decreases the beam intensity of boron isotopes compared with those without the addition of boron-free seawater. We think that the boron-free seawater addition method is not effective for NanoSIMS analysis.
As for seawater samples, we tried with/without Au (gold) coating sample preparations. The samples without Au coating showed δ^<11> B values ranging +32〜+73, which were quite different form the reported value for seawater (+39.5). On the other hand, δ^<11> B values of sample with Au coating calculated from data of NIST 951 treated by same manner showed +44〜+46, which were nearly identical with the reported value of seawater. Although further studies are required, the Au coating method may be effective for accurate boron isotopic composition analysis using NanoSIMS.
δ^<11> B values of the hot spring sample were +2.6 and +5.6, which were within the range of those of volcanic gases of Japan. The condensation of atmospheric sample collected at Ocean Research Institute, University of Tokyo showed δ^<11> B values of -5.1, -1.8 and +5.0, which is almost same as δ^<11> B value (+1.7) of sample collected at the same location.
These facts suggest that NanoSIMS could be used for accurate boron isotopic determination of natural solution samples.
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Report
(3 results)
Research Products
(30 results)
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[Journal Article] Ultra-sensitive detection of p-process nuclide ^<146>Sm produced by (γ, n), (p,pn ε) and (n, 2n) reactions2008
Author(s)
Kinoshita N., Hashimoto, T. Nakanishi, A. Yokoyama, H. Amakawa, T. Mitsugashira, T. Ohtsuki, N. Takahashi, I. Ahmad, J. P. Greene, D. J. Henderson, C. L. Jiang, M. Notani, R. C. Pardo, N. Patel, K. E. Rehm, R. Scott, R. Vondrasek, L. Jisonna, P. Collon, D. Robertson, C. Schmitt, X. D. Tang, Y. Kashiv, H. Nassar I and M. Paul
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Journal Title
Journal of Physics-G: Nuclear and Particle Physics Sciences 35
Pages: 1010880954-389935
Description
「研究成果報告書概要(和文)」より
Related Report
Peer Reviewed
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[Journal Article] Ultra-sensitive detection of p-process nuclide^ <146>Sm produced by (γ,n),(p,pnε) and (n,2n)reactions2008
Author(s)
Kinoshita N., Hashimoto, T. Nakanishi, A. Yokoyama, H, Amakawa, . T. Mitsugashira T. Ohtsuki, N, Takahashi. I. Ahmad, J.P. Greene, D.J. Henderson, C.L. Jiang, M. Notani, R.C. Pardo, N. Puel, K.E. Rehm, R. Scott, R. Vondmsek, L. Jisonna, P. Collon, D. Robetson,,X D. Tang, Y, Kashiv, H,Nassar and M.Paul
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Journal Title
Journal of Physics-G: Nuclear and Particle Physics Sciences 35
Related Report
Peer Reviewed
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[Journal Article] Technological development for half-life measurement of^<146> Smnuclide2007
Author(s)
Kinoshita N., T. Hashimoto, T. Nakanishi, A. Yokoyama, H. Amakawa, T. Mitsugashira, T. Ohtsuki, N. Takahashi, I. Ahmad, J. P. Greene, D. J. Henderson, C. L. Jiang, M. Notani, R. C. Pardo, N. Patel, K. E. Rehm, R. Scott, R. Vondrasek, L. Jisonna, P. Cllon,D. Robertson, C. Schmitt,X. D. Tang, Y. Kashiv and M. Paul
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Journal Title
Journal of Nuclear and Radiochemical Sciences 8
Pages: 109-112
Description
「研究成果報告書概要(和文)」より
Related Report
Peer Reviewed
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[Journal Article] Technological development for half-life measurement of^< 146>Sm nucide2007
Author(s)
Kinoshita N., T. Hashimoto, T. Nakanishi, A. Yokoyama, H, Amakawa T. Mitsロgasira T. Ohtsuki, N. Takahashi, I. Ahmad, J. P. Greene, D. J. Henderson C.L. Jiang, M. Notani, R.C. Pardo, N. Patel, K.E. Rehm, R. Scott, R. Vondrasek, L. Jisonna, P.Collon, D. Robertson, C.Schmitt, X.D. Tang, Y,KashivandM.Paul
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Journal Title
Journal of Nuclear and Radiochemical Sciences 8
Related Report
Peer Reviewed
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[Presentation] アユ耳石のストロンチウム安定同位体比2007
Author(s)
鈴木隆史、高橋俊郎、天川裕史、大竹二雄
Organizer
平成19年度日本水産学会秋季大会
Place of Presentation
函館(北海道)
Year and Date
2007-09-25
Description
「研究成果報告書概要(和文)」より
Related Report
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[Presentation] Srisotopic composition in Ayu otolith2007
Author(s)
T. Suzuki, T. Takahashi, H. Amakawa and T. Otake
Organizer
2007 Fall Meeting of The Japanese Society of Fisheries Science
Place of Presentation
Hakodate(Japan)
Year and Date
2007-09-25
Description
「研究成果報告書概要(欧文)」より
Related Report
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