巻号一覧
35 巻 (1987)
- 6 号 p. 335-
- 5 号 p. 226-
- 4 号 p. 186-
- 3 号 p. 90-
- 2 号 p. 42-
- 1 号 p. 1-
35 巻, 5 号
選択された号の論文の5件中1～5を表示しています
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報文
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小池 俊明, 山本 博之, 菊地 正, 古谷 圭一1987 年 35 巻 5 号 p. 226-230
発行日: 1987年
公開日: 2007/05/01
ジャーナル フリーThe sputtering behavior of secondary ion from copper surface against primary ion energy less than 3 keV has been studied. A remarked increase of relative ionization coefficient of sputtered ion was observed. This result suggests the existence of another sputteirng mechanism in a low energy region less than 1 keV. The neutralization and re-ionization of irradiated ion in this energy region may cause the change of ionization efficiency.抄録全体を表示PDF形式でダウンロード (296K) -
辻本 和雄, 田原 好文, 舟倉 佐一, 大橋 守1987 年 35 巻 5 号 p. 232-239
発行日: 1987年
公開日: 2007/05/01
ジャーナル フリーIn-beam EI spectra of monosaccharides exhibited many peaks in the higher mass region than the protonated molecular peak. Those peaks are accounted for in terms of successive loss of water molecules from [2M+1]+, [2M+1-30]+ and [2M+1-60]+ ions. The intensities of those peaks increased with an increase in temperature of the sample heater. In-beam EI spectra of sucrose were also observed and turned out to be very similar to those of glucose.抄録全体を表示PDF形式でダウンロード (285K) -
Kozo Matsumoto, Shin Tsuge, Hiroshi Hirose1987 年 35 巻 5 号 p. 240-247
発行日: 1987年
公開日: 2007/05/01
ジャーナル フリーAn improved interface was developed for the combination of high performance liquid chromatography and double focussing mass spectrometry. A fused sillica capillary tube was drawn in a small coal gas flame to form a nozzle tip of the nebulizing interface from which a portion of the liquid chromatographic effluent spouted. Fundamental operational conditions for stable and continuous introduction of the effluent into the ion source were studied. This system was applied to the analysis of thermally labile compounds with high molecular weight, polyethylene glycol-600, polystyrene-1000 and triglycerides. The triglyceride components in coconut oil were also analyzed.抄録全体を表示PDF形式でダウンロード (427K) -
Shizuo Mohara, Mitsutoshi Tanimoto1987 年 35 巻 5 号 p. 248-257
発行日: 1987年
公開日: 2007/05/01
ジャーナル フリーPeptides containing the disulfide bond were investigated by molecular secondary ion mass spectrometry. The mass spectra for the disulfide form as well as those for the reduced dithiol form of the peptides were observed. The reduction was the result of the reaction of the peptides with a thiol containing compound used as a matrix in secondary ion mass spectrometry. The observation with different matrices enables to confirm the existence of disulfide bonds.抄録全体を表示PDF形式でダウンロード (469K)
技術報告
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五十嵐 丈二, 小嶋 稔1987 年 35 巻 5 号 p. 258-290
発行日: 1987年
公開日: 2007/05/01
ジャーナル フリーWe have developed an automatic control system using a personal computer (PC9801, NEC Co.) for noble gas mass spectrometric analyses. We have analyzed successfully elemental and isotopic abundances of heavy noble gases (Ne, Ar, Kr and Xe) in terrestrial gas and water samples such as volcanic gas, deep seawater and lake water samples with this system.
The magnetic field is measured with a Hall-probe Gauss meter and is automatically controlled by the personal computer. Ion beam is detected by a vibrating reed electrometer with a SEM. The current is read in the personal computer and the ampere range of the electrometer is also automatically controlled by the computer.
We have developed a software (in N88 DISK BASIC) for noble gas analyses using this system. We took full advantage of the “color graphics” and “interrupt operations” of the PC 9801 personal computer. We provide two kinds of scan programs: one is to monitor mass spectra on the color display and the other is to correct peak positions and to calculate resolution of the mass spectrometer. Mass spectrometric data of noble gas isotopes are obtained by a combination of peak scan and peak hopping, that is, only a top part of a peak (about a half of the peak width) is scanned and the 10 running means are calculated, and then the magnetic field is hopped to the next peak. The data are stored in a floppy disk. A time extrapolation of the data to the time when the sample was introduced into the mass spectrometer is carried out by least-squares fitting with either a linear or an exponential function. A weighted mean of the data is also calculated for comparison.抄録全体を表示PDF形式でダウンロード (1499K)
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