| Project/Area Number |
63540466
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
分析・地球化学
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| Research Institution | National Institute for Environmental Studies |
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Principal Investigator |
FUJII Toshihiro National Institute for Environmental Studies, Division of Chemistry and Physics, Air Quality Measurement Section, Section Chief., 計測技術部, 室長 (60109907)
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| Project Period (FY) |
1988 – 1989
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| Project Status |
Completed (Fiscal Year 1989)
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| Budget Amount *help |
¥1,200,000 (Direct Cost: ¥1,200,000)
Fiscal Year 1989: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1988: ¥700,000 (Direct Cost: ¥700,000)
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| Keywords | alkali metal ion / adduct ion / lithium ion / attachment reaction / mass spectrometry / cationization / radical detection / ionization method / 化学イオン化 / 表面電離 / カチオニゼーション |
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| Research Abstract |
Research consists of two main parts;
1) Development of the new ion source for mass spectrometry was made which provides mass spectra consisting of quasi-moleule ions (M+Li)+ by lithium ion attachment to sample molecule (M) in the high pressure. The system employs the thermionic lithiunt ion emitter in a flow of nitrogen buffer gas and high pressure mass spectrometer with ion counting device. Lithium ions are generated by heating the lithium oxide in an aluminosilicate mastrix. The lithium ion source is hooked to the three stage differentially-pumped mass spectrometry. Experimental conditions and some applications are studied. Emphasis is given to establishment of the high sensitive system.
2) A device has been developed which permits sampling at atmospheric pressure followed by soft ionization mass spectrometry. Broadly, the instrument can be divided into three sections. Firstly, gases are introduced at atmospheric pressure into an ionization chamber containing a lithium ion source. The second section consists of a reaction chamber where lithium attachment to the molecule takes place. Thirdly, the ionized adduct is detected by a quadrupole mass spectrometer. With this instrument incorporating soft ionization, it should be possible at atmospheric pressure to detect unstable intermediate species such as those contained in a flame. In addition, the coupling to super fluid critical, gas and liquid chromatographs is feasible.
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