巻号一覧
30 巻 (1982)
- 4 号 p. 281-
- 3 号 p. 219-
- 2 号 p. 129-
- 1 号 p. 31-
30 巻, 3 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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内田 悦行, 三輪 哲也, 服部 秀三1982 年 30 巻 3 号 p. 219-226
発行日: 1982年
公開日: 2007/05/01
ジャーナル フリーA new type of radio frequency quadrupole mass spectrometer is proposed and some theoretical considerations for making the mass spectrometer are given. New points of this mass spectrometer are: (a) A quadrupole electric field is produced with ac voltage only, without any dc voltage. (b) The 2nd-order stable region in the quadrupole field is used for ion transmission. The results obtained from the numerical calculation of ion trajectories in the quadrupole field are as follows: (a) The resolving power is found to be about 150. (b) The permissible aparture size is smaller than that of conventional mass spectrometer with ac and dc components. (c) The effect of fringing field is, however, considerably greater than that of the conventional one. (d) The number of rf cycles during which an ion must remain in the field is about 8 times smaller than that of the conventional one having the same resolving power. (e) It can be operated at lower ac voltage of lower radio frequency.抄録全体を表示PDF形式でダウンロード (574K) -
尾嶋 正治, 本間 芳和1982 年 30 巻 3 号 p. 227-238
発行日: 1982年
公開日: 2007/05/01
ジャーナル フリーImpurity analysis in Si and GaAs with Secondary Ion Mass Spectromotry (SIMS) has been studied using ion implanted substrates as standard samples. Oxygen ion beams were used as a primary beam for B+, As+, P+, Cr+ and Be+ detection, and Cesium ion beams for O-, Si- and S- detection. By means of high resolution mass analysis (M/ΔM ≒7000), 4 decades' in-depth profiles of P in Si could be obtained. Detection limits were determined from in-depth profiles and discussed with regard to base pressure in the analytical chamber, contamination of immersion lens and relative sensitivities.抄録全体を表示PDF形式でダウンロード (741K) -
―ヒトの各種臓器分析への試み―田村 一二三, 只野 寿太郎, 岡野 寛1982 年 30 巻 3 号 p. 239-247
発行日: 1982年
公開日: 2007/05/01
ジャーナル フリーProblems of charge accumulation on the sample surfacc of human intenal organ and quantitative interpretation of secondary ion intensity are briefly discussed and some typical applications are presented.
Relative concentrations of Fe, Cu, and Zn are measured by two methods: SIMS and Atomic Absorption Spectroscopy (AAS). The AAS method is utilized to evaluate secondary ion intensities measured by SIMS. Relative secondary ion intensity of each element measured by SIMS are corrected in such a way as to be normalize by secondary oxygen ion intensity. The oxygen ions originate from oxygen implanted into the sample surface as primary ion species.
It appears that measurement of Zn, Fe and Cu in internal organs with oxygen ion bombardment has detection limits of approximately 0.3, 0.1, and 0.2 μg/g, repectively.抄録全体を表示PDF形式でダウンロード (647K) -
代島 茂樹, 飯田 芳男1982 年 30 巻 3 号 p. 249-256
発行日: 1982年
公開日: 2007/05/01
ジャーナル フリーCI mass spectra of twentyfour alkylbenzenes, C11H16~C25H44, were measured in order to elucidate the characteristic correlation between their molecular structures and the CI mass spectra. Approximately 2 μg of each sample dissolved in acetone or benzene were introduced into a Finnigan 3300E GC/QMS equipped with an OV-1 GC column. Pressure of methane or isobutane as a reagent gas in an inonization chamber was 1.0 and 0.5 Torr, respectively. The ion source temperature was maintained at 70°C. The molecular weights of all alkylbenzenes were clarified securely by (M±H)+, M+ and adduct ions appeared in methane and isobutane CI, especially in the latter. Alkyl substituents could be determined by observing ions formed by olefin displacement reactions, e. g., (M-13)+, (M-27)+, (M-41)+ and the fragment ions such as CnH2+n⌉+ and (M-CmH2m+1)+, especially by methane CI. The C7H8+ (m/z 92) ions and its homologous ions gave the same information as that in EI. Numbers of substituents could also be successfully estimated. Positions of substituents in di-substituted benzene isomers could be determined by observing ions such as (M+57)+ in isobutane CI. It was generally very difficult to determine the positions of substituets in tri-substituted benzenes owing to insufficient information.抄録全体を表示PDF形式でダウンロード (397K) -
T. Matsuo, H. Matsuda, I. Katakuse, Y. Wada, A. Hayashi1982 年 30 巻 3 号 p. 257-263
発行日: 1982年
公開日: 2007/05/01
ジャーナル フリーField desorption mass spectra of peptides of human β globin digested by thermolysin and staphylococcal protease were investigated. The sites of the cleavages deduced from the mass spectra were in good agreement with those estimated from previous reports.抄録全体を表示PDF形式でダウンロード (387K)
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