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Volume 39 (1991)
- Issue 6 Pages 301-
- Issue 5 Pages 213-
- Issue 4 Pages 183-
- Issue 2 Pages 49-
- Issue 1 Pages 1-
Volume 39, Issue 2
Displaying 1-6 of 6 articles from this issue
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REGULAR PAPERS
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Motohiro NAITO1991 Volume 39 Issue 2 Pages 49-56
Published: 1991
Released on J-STAGE: July 20, 2007
JOURNAL FREE ACCESSIn the previous paper the expression of the path equation in the arbitrary given curvilinear co-ordinate system was deduced.
In this paper, the mass dispersion and the energy dispersion of ions, in such generailzed curvilinear co-ordinate systems was discussed by using the Liouville theorem.View full abstractDownload PDF (525K) -
Motohiro NAITO1991 Volume 39 Issue 2 Pages 57-62
Published: 1991
Released on J-STAGE: July 20, 2007
JOURNAL FREE ACCESSIn the previous paper, entitled “A New Ion Optical Investigation of Electric and Magnetic Crossed Fields I”, the 1st order ion optical properties of the new crossed field were examined, assumming a new type of an electric field in which the converging field component and the dipole field component can vary independently. To realize such a new type of an electric field, a system consisting of concentric multi electrodes and resistance film on a pair of parallel plates was examined in this paper.View full abstractDownload PDF (357K) -
Hideo SAWADA, Kazuko AKUZAWA, Motohiro MITANI, Masaharu NAKAYAMA1991 Volume 39 Issue 2 Pages 63-69
Published: 1991
Released on J-STAGE: July 20, 2007
JOURNAL FREE ACCESSThe EI mass spectral fragmentation of a series of perfluoro-oxa-alkylated aromatic compounds, [ArCFCF3{OCF2CF(CF3)}nOC3F7, n=0, 1, 2, Ar=phenyl, 2-furyl, 2-thienyl, 2-pyrrolyl] was investigated in comparison with those of the corresponding non-fluorinated one (PhCHCH3OC3H7) and fluoroalkylated benzenes [Ph(CF2)nCF3, n=2, 6]. These fragmentation processes were discussed on the basis of accurate mass measurements and B/E constant linked scannings. In perfluoro-oxa-alkylated aromatic compounds, it was clarified that these compounds show the characteristic fragmentation path ways which result from the α-fission of parent ion and the dissociation of oxygen-carbon bond in perfluoro-oxa-alkyl groups. In fluoroalkylated benzenes, it was indicated that these benzene derivatives show the main fragmentation path ways by the loss of fluoroalkyl groups to afford difluorobenzyl ion.View full abstractDownload PDF (319K) -
Fumiyo MATSUNO, Nobuyuki ASADA, Akinobu TOYODA, Seiji TOBITA, Susumu T ...1991 Volume 39 Issue 2 Pages 71-78
Published: 1991
Released on J-STAGE: July 20, 2007
JOURNAL FREE ACCESSStereoisomeric cis-, trans-cyclopentene-3,4-diols (1 and 2), and cis-, trans-cyclopentene-3,5-diols (3 and 4) are differentiated by comparing the mass spectra of their trimethylsilyl derivatives. The relative ion abundances at m/z 147 [(CH3)3SiOSi(CH3)2]+ of cis-isomers (1 and 3) are larger than those of the corresponding trans-isomers (2 and 4), respectively.
Most of the metastable molecular ions of 1 and 2 fragment to the ions at m/z 82 and m/z 72 by losing H2O and CO, respectively. Accompanying with the above two reactions, however, the molecular ions of 3 and 4 fragment to the ions at m/z 81 and m/z 71 by losing H3O and CHO. The B/E linked scan spectra of the m/z 72 ions from 1 (and 2), and 3 (and 4) were in agreement with those of the molecular ions of butanal and 2-butanone, respectively.View full abstractDownload PDF (407K) -
Akihiro SHIBATA, Yoshio IIDA, Hironori YAGI1991 Volume 39 Issue 2 Pages 79-91
Published: 1991
Released on J-STAGE: July 20, 2007
JOURNAL FREE ACCESSThe mass calibration standard materials in the low mass region for negative ion chemical ionization (NCI) mode in a magnetic sector mass spectrometer were sought, because perfluorokerosine (PFK) and perfluorotributylamine (PFTBA) used in EI mode scarcely produce negative ions below m/z 200. The 45 fluorine-containing compounds (5 alkanes, 6 ketones, 5 esters, 5 ethers, and 3 acid anhydrides, etc.) were tested, and the 10 : 1 : 1 mixture of 3 esters [CF3COOCH3, C2F5COOC2H5, C3F7COOC2H5] and the 1 : 1 : 1 mixture of 3 acid anhydrides [(CF3CO)2O, (C2F5CO)2O, (C3F7CO)2O] were found to be advantageous. In their NCI mass spectra, ions were observed at m/z 69, 85, 113, 128, 144, 178, 194, and m/z 113, 128, 144, 163, 178, and 194, respectively, with the relative ion intensities of several to 100%. The standard materials for mass calibration and for selected ion monitoring were also purposed.View full abstractDownload PDF (622K)
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Yasuo HAYASHI, Kiyoshi MATSUMOTO1991 Volume 39 Issue 2 Pages 93-96
Published: 1991
Released on J-STAGE: July 20, 2007
JOURNAL FREE ACCESSIn order to examine the sputtering process of indium tin oxide (ITO) films, secondary neutral mass spectrometry (SNMS) was applied to analyze fragmentation of the sputtered neutral particles from the ITO target. It was found that both atomic and molecular fragments such as InOSn were included in the sputtered neutrals. The relative amount of InOSn cluster fragment depends on the structural state of Sn atoms in the ITO target. That is, there are two structural state of Sn atoms so for as known; one is SnO2 grain segregated in In2O3, and the other is the solid solution state of Sn in In2O3 structure. The latter is related to the formation of InOSn cluster. On the basis of the analyses, mechanisms are discussed as to how the electrical resistivity of the sputtered ITO films is influenced by the structural state of Sn in the ITO target.View full abstractDownload PDF (257K)
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