1990 Fiscal Year Final Research Report Summary
Studies on Supersonec Jet/Synchronous Scan Luminescence Spectrometry
| Project/Area Number |
01470065
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
工業分析化学
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| Research Institution | Kyushu University |
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Principal Investigator |
ISHIBASHI Nobuhiko Kyushu University Professor Faculty of Engineering, 工学部, 教授 (00037673)
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| Co-Investigator(Kenkyū-buntansha) |
KAWABATA Yuji Kyoshu University Research Faculty of Engineering Associate, 工学部, 助手 (70152999)
IMASAKA Totaro Kyushu University Associate Faculty of Engineering Professor, 工学部, 助教授 (30127980)
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| Project Period (FY) |
1989 – 1990
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| Keywords | Laser Spectrometry / Supersonic Molecular Jet / Fluorescence Spectrometry / Synchronous Scan Luminescence Spectrometry / Trace Analysis / Polycyclic Aromatic Hydrocarbon / Anthracene Derivatives / Solvent Refined Coal |
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| Research Abstract |
A narrow spectral structure is observed in supersonic jet spectrometry, since a sample molecule cooled to several kelvin. Therefore, this method has very high selectivity in spectrometric analysis. In this study we further improved selectivity by a combination with synchronous scan luminescence spectrometry.
We developed two approaches in this method, namely normal-synchronous scan luminescence (N-SSL) spectrometry and reverse-synchronous scan luminescence (R-SSL) spectrometry. In the former approach, the fluorescence intensity was measured by adjusting the monochromator wavelength to lambda em =lambda ex and by scanning it synchronously. In the latter approach, the fluorescence intensity was measured by blocking fluorescence at lambda em =lambda ex using an optical mask. The N-SSL technique provided a simple spectrum, and it was useful for assignment of chemical species using a database constructed from reference values. Contrarily, the R-SSL technique provided a fingerprinting spectru
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m, and it was useful for confirmation of the above assignment and for quantitative analysis due to its high sensitivity.
For best use of these two approaches, we determined the following analytical procedure : (1) detection of chemical species by R-SSL spectrometry (2) the measurement of the N-SSL spectrum (3) the assignment of signal peaks using the database for wavelengths of 0-0 transition (4) the assignment with the standard N-SSL spectrum (4) confirmation of the assignment with the standard R-SSL spectrum (5) quantitative analysis by R-SSL spectrometry.
A mixture sample containing seven anthracene derivatives were measured by following this analytical procedure. Ten peaks were observed in the N-SSL spectrum and thirty one peaks in the R-SSL spectrum. Five components (five peaks) were readily assigned by using the database constructed from the reference values accumulated for 250 compounds. The rest components and spectral peaks were assigned by using the spectral data measured for the standards. Solvent refined coal produced in Hokkaido was measured to demonstrate the figure of merit in this method. Six peaks were observed in the N-SSL spectrum and nineteen peaks in the R-SSL spectrum. Three components, i. e. anthracene, 1- and 2-methylanthracene were found to be contained in this sample. The concentration of anthracene in solvent refined coal was 100 ppm. Less
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