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Volume 34, Issue 1
Displaying 1-6 of 6 articles from this issue
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REGULAR PAPERS
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Hiroyasu Shichi, Eiichi Izumi, Eisuke Mitani, Hifumi Tamura1986 Volume 34 Issue 1 Pages 13-20
Published: 1986
Released on J-STAGE: May 01, 2007
JOURNAL FREE ACCESSThe fundamental characteristics of a newly developed Cs surface ionization ion source are described. This Cs ion source has two main features. One of the features is the use of the chemically stable compound CsCl as the ion source material, which can be handled safely. Another feature is the utilization of electron bombardment to heat the prous tungsten ion emitter, which results in high ion current density.
The angular ion intensity amounts to 104μA/sr at the ion emitter temperature of 1500°C. This value leads to the maximum sample ion current of 10 μA, when it is used as a primary gun of SIMS. The Cs ion current intensity is stabilized within ±0.6 % for 30min., by means of controlling heating power of the ion emitter.
With this ion gun the SIMS depth profile of As is carried out with detection limit of -1013 atoms/cm3. From the spatial resolution of secondary electron image, the minimum beam diameter is estimated to be about 2 to 3 μm.View full abstractDownload PDF (529K) -
Itsuo Katakuse, Toshio Ichihara, Yoshitaka Fujita, Takekiyo Matsuo, To ...1986 Volume 34 Issue 1 Pages 21-25
Published: 1986
Released on J-STAGE: May 01, 2007
JOURNAL FREE ACCESSSize distributions of Pb, Bi, and Mo clusters produced by Xe ion bombardment have been measured by a deflection type mass spectrometer. In general, the ion intensity decreases with increasing cluster size n. Superimposed on this gradual decrease with n, some anomalies have been observed in the cases of Pb and Bi. No prominent anomaly for Mo clusters has been observed. A correlation is found between the size distribution of clusters produced by Xe ion bombardment and that produced by inert gas condensation method.View full abstractDownload PDF (330K) -
Soichi Nadahara, Hiroki Yokozawa, Tadashi Kikuchi, Keiichi Furuya, Shi ...1986 Volume 34 Issue 1 Pages 27-31
Published: 1986
Released on J-STAGE: May 01, 2007
JOURNAL FREE ACCESSFor the purpose of identification of “plate-out” matters from polyvinylchloride compound by using laser microprobe mass analyzer (LAMMA), a quartz wool sampling technique was invented for a trace amount of “plate-out” matters from a roller. Particulate matters attached to the quartz wool by scratching off from “plate-out” matters on the roller were investigated. Among di-octylphthalate, calcium stearate, zinc stearate, di-buthyl-tin-maleate and ST-210 in the compound, it was found that calcium stearate adhered preferentially on the roller from the compound.View full abstractDownload PDF (250K) -
Kozo Matsumoto, Shin Tsuge1986 Volume 34 Issue 1 Pages 33-40
Published: 1986
Released on J-STAGE: May 01, 2007
JOURNAL FREE ACCESSA directly coupled high-performance liquid chromatograph (HPLC) and a mass spectrometer (MS) through a self-spouting and vacuum nebulizing assisted interface was applied to the analysis of various triglycerides of which fatty acid components ranged from C2 and C12. HPLC separation of the triglycerides was carried out by a reversed phase column using a mixture mobile phase of acetonirile tetrahydrofuran (70: 30 vol). Mass spectrometric detection was made by quadrupole mass spectrometer. Although the exact position of the fatty acid components in the triglycerides could not be determined, the combination of three fatty acid groups was easily determined by the selected ion monitoring (SIM) of the HPLC eluent.View full abstractDownload PDF (348K) -
Naohito Takeda, Ken-ichi Harada, Katsuyoshi Masuda, Makoto Suzuki, Aki ...1986 Volume 34 Issue 1 Pages 41-48
Published: 1986
Released on J-STAGE: May 01, 2007
JOURNAL FREE ACCESSThe direct analysis of underivatized aminoglycoside antibiotics containing an aminoacyl group, butirosins, amikacin, and HAPA-B and its analogues, by desorption chemical ionization (D/CI) and molecular secondary ion mass spectrometry (SIMS) has been demonstrated. The general features and unique characteristics of these two methods are discussed. The [MH]+ ions in D/CI is not as strong as in molecular SIMS, however, the D/CI spectra provide straightforward sequence information. Comparative sequence specific fragments can be obtained in the metastable ion spectra of the [MH]+ produced by SIMS, and thus obtained sequence information often complements that with D/CI method. Combination of D/CI and molecular SIMS experiments has enabled the unequivocal characterization for the structures of aminoglycoside antibiotics containing an aminoacyl group.View full abstractDownload PDF (387K) -
Hidetoshi Fujiwara, Akira Kato1986 Volume 34 Issue 1 Pages 49-52
Published: 1986
Released on J-STAGE: May 01, 2007
JOURNAL FREE ACCESSThe mass spectra of 3-dimethylaminocyclohexanol derivatives (1-8) were measured by electron impact ionization.
The characteristic ions for 3-dimethylaminocyclohexanol derivatives are the fragment ions at [M-43]+, m/z 142, m/z 124, m/z 100, m/z 98, m/z 84, m/z 71, m/z 58, and m/z 45.
The cis- and trans-configurations of 3-dimethylaminocyclohexanol derivatives can be identified by observing the peak intensities at m/z 100 and m/z 45. The difference between alkyl and phenyl substituents can be recognized by the peak intensities at m/z 142 and 124.View full abstractDownload PDF (234K)
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