著者

馬上 謙一

出版者

一般社団法人 日本質量分析学会

雑誌

Journal of the Mass Spectrometry Society of Japan (ISSN:13408097)

巻号頁・発行日

vol.64, no.5, pp.219-221, 2016-10-01 (Released:2016-10-15)

参考文献数

6

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北海道大学大学院理学研究院地球惑星科学部門地球惑星システム科学分野地球化学研究グループでは,太陽系の起源と進化の解明を目指しています.そのため,光学顕微鏡,電子顕微鏡,X線分光法,質量分析法などの手法を駆使して,地球内外の物質を正確に分析し,解析しています.この結果,全く新しい惑星や太陽系の起源や生い立ちが詳しくわかってきました.また,地球内外物質からこれまで読み取られていなかった全く新しい情報を獲得するため,物質を解析する新しい方法(分析法,解析装置,合成装置)の設計・開発も同時に行っています.また,これら一連の研究の中に,現在まで認知されていない自然法則や現象が潜んでいて,それを発見できれば一層楽しいと考えています.現在筆者が使用している質量分析装置は非常に小さな領域(μmからnmスケール)の希ガス同位体を測定するためのスパッタ中性粒子質量分析装置(Sputtered Neutral Mass Spectrometer; SNMS)です.この装置の開発の経緯やどのような分析ができるのかを紹介させていただきます.

著者

佐々木 申二

出版者

The Mass Spectrometry Society of Japan

雑誌

Journal of the Mass Spectrometry Society of Japan (ISSN:13408097)

巻号頁・発行日

vol.1959, no.12, pp.3-3, 1959-03-31 (Released:2010-06-28)

著者

島 正子

出版者

一般社団法人 日本質量分析学会

雑誌

Journal of the Mass Spectrometry Society of Japan (ISSN:13408097)

巻号頁・発行日

vol.62, no.6, pp.77-85, 2014-12-01 (Released:2014-12-15)

参考文献数

23

被引用文献数

1

著者

杉浦 悠毅 新間 秀一

出版者

日本質量分析学会

雑誌

Journal of the Mass Spectrometry Society of Japan (ISSN:13408097)

巻号頁・発行日

vol.65, no.5, pp.215-219, 2017-10-01 (Released:2017-10-15)

参考文献数

3

被引用文献数

2

著者

中山 泰宗 松田 史生

出版者

日本質量分析学会

雑誌

Journal of the Mass Spectrometry Society of Japan (ISSN:13408097)

巻号頁・発行日

vol.65, no.5, pp.210-214, 2017-10-01 (Released:2017-10-15)

参考文献数

14

著者

馬場 健史

出版者

日本質量分析学会

雑誌

Journal of the Mass Spectrometry Society of Japan (ISSN:13408097)

巻号頁・発行日

vol.65, no.5, pp.193-194, 2017-10-01 (Released:2017-10-15)

著者

角野 浩史

出版者

日本質量分析学会

雑誌

Journal of the Mass Spectrometry Society of Japan (ISSN:13408097)

巻号頁・発行日

vol.63, no.1, pp.1-30, 2015-02-01 (Released:2015-02-15)

参考文献数

213

被引用文献数

3

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Because noble gases are chemically inert, scarce in the earth and meteorite (except 40Ar in the earth’s atmosphere), and highly volatile, their isotope ratios have provided important insights in research fields of earth, planetary, and environmental sciences. The progress of noble gas geochemistry and cosmochemistry has been paced by the rate of developments in mass spectrometry. In this contribution, the history and basic principles of noble gas mass spectrometry and general techniques used in most modern laboratories are overviewed. The noble gas mass spectrometry has developed with inventions of various techniques—Nier type electron ionization (EI) source, static mode operation under ultrahigh-vacuum, adequately high resolution to distinguish very minor noble gas isotopes from interferences, and numerous small tips accumulated in laboratories—to attain increasingly greater precision to distinguish the often subtle variations in isotopic compositions, higher sensitivity to measure the low abundances found in many materials, and lower blanks to remove interference from atmospheric gases. New technologies recently exploited, such as simultaneous detection of noble gas isotopes with multicollector detection system, high-transmission EI source, resonance ionization, compression EI source, post-ionization of sputtered noble gases by focused ion beam, which enable us to detect quite small amount of noble gases down to several thousands of atoms, are opening new era of noble gas mass spectrometry. The highly-sensitive noble gas mass spectrometry can be applied to continuous monitoring of activity of volcanoes or active faults and to detect trace amount of noble-gas producing elements upon neutron irradiation, such as halogens, potassium, calcium, uranium, etc.

著者

浅川 大樹 森 邦彦 平岡 賢三

出版者

日本質量分析学会

雑誌

Journal of the Mass Spectrometry Society of Japan (ISSN:13408097)

巻号頁・発行日

vol.55, no.3, pp.127-135, 2007 (Released:2007-06-15)

参考文献数

35

被引用文献数

4 4

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A new ionization method, electrospray droplet impact ionization (EDI), has been developed for matrix-free secondary-ion mass spectrometry (SIMS). The charged droplets formed by electrospraying 1 M acetic acid aqueous solution are sampled through an orifice with a diameter of 400 μm into the first vacuum chamber, transported into a quadrupole ion guide, and accelerated at 10 kV after exiting the ion guide. The droplets impact on a dry solid sample (no matrix used) deposited on a stainless steel substrate. The secondary ions formed by the impact are transported to a second quadrupole ion guide and are mass-analyzed by an orthogonal time-of-flight mass spectrometer. EDI/SIMS was found to be an easy to operate and versatile method for molecular-level surface analysis.

著者

井上 雅夫 藤原 真 小野山 勝 後藤 豊

出版者

日本質量分析学会

雑誌

Journal of the Mass Spectrometry Society of Japan (ISSN:13408097)

巻号頁・発行日

vol.35, no.2, pp.42-54, 1987 (Released:2007-05-01)

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This paper reports a Fourier transform ion cyclotron resonance (FT-ICR) mass spectrometer built in this laboratory. The spectrometer consists of a 5 Tesla superconducting magnet, a cylindrical trapped ion cell with an electron beam source, electronic circuits, a microcomputer which generates pulse sequence and controls a data acquisitions system, and a personal computer.The mass spectrum of xenon isotopes has been obtained by a preliminary experiment. An intense low frequency signal of several hundreds Hz was observed along with the time domain transient signals of ion cyclotron resonance frequencies. The former can be attributed to the rotation of the center of cyclotron motion of ions about the cell axis. This rotational motion is caused by the drift due to the radial electric field component and the magnetic field gradient produced in the plane perpendicular to the cell axis.Analysis of the inhomogeneities of electric and magnetic fields inside the cell and the motion of ions has been carried out and the variation of the frequency of rotation as a function of the kinetic energy of ions has been studied.

著者

後藤 豊 天野 力 井上 雅夫

出版者

日本質量分析学会

雑誌

Journal of the Mass Spectrometry Society of Japan (ISSN:13408097)

巻号頁・発行日

vol.31, no.2, pp.115-120, 1983 (Released:2007-05-01)

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This paper reports a microcomputer based data acquisition system for Fourier transform ion cyclotron resonance (FT-ICR) mass spectroscopy. The system has been developed for a prototype spectrometer constructed with a permanent magnet whose magnetic field strength is 6,200 gauss. The system cosists of two-channel sampling ports with sample-hold circuits, a multiplexer, an A-D converter, an I/O port and a logic circuit. The logic circuit starts data acquisition synchronizing with an external trigger pulse. The acquisition is then repeated for preset number of times to accumulate data for signal averaging. An operating program for the system was written in an assembly language in order to execute high-speed data acquisition and a program for FT-ICR experiments was written using BASIC. Resolution of 40,000 was obtained with CO+ ion in residual gas.

著者

土屋 正彦 堀井 雄二

出版者

The Mass Spectrometry Society of Japan

雑誌

Journal of the Mass Spectrometry Society of Japan (ISSN:13408097)

巻号頁・発行日

vol.22, no.1, pp.79-85, 1974

被引用文献数

4

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Mass spectra of excess-kinetic-energy ions(KE ions)formed under electron impact have been studied by using a commercial mass spectrometer with the modified ion source. Parent ions of KE ions may be so much excited than those of thermal-energy ions that they may decompose more quickly and give much simple cleavage ions and less rearrangement ions. Therefore the mass spectrum of KE ions must be different from the ordinary mass spectrum. Several compounds of alcohols and ethers have been studied. Simple relations have been found between the mass spectra of KE ions and the structure of these compounds. Generally, fragment ions which are smaller than a half of a molecule can be observed as KE ions and the terminal groups of a compound, such as CH3CO, -CH2OH, HCO-, C2H5-and so on, give the intense peaks. It has been proved that the mass spectra of KE ions show less rearrangement and are useful for the structure determination of organic compounds

著者

瀬藤 光利

出版者

日本質量分析学会

雑誌

Journal of the Mass Spectrometry Society of Japan (ISSN:13408097)

巻号頁・発行日

vol.64, no.5, pp.201-218, 2016-10-01 (Released:2016-10-15)

参考文献数

106

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For the Incentive Award of the Mass Spectrometry Society of Japan Incentive Award, this review will over view the works of mass spectrometry from Setou lab. Mainly, papers 2002–2010 are about development of imaging mass spectrometry. Papers 2010–2015 are mainly the application of imaging mass spectrometry for clinical samples. Recently, several papers are about the applications of secondary ion mass spectrometry. Most significant findings are that various lipid species have their own tissue distribution pattern in tissues and cells through these studies.

著者

小林 良夫 能美 隆 下池 洋一 上野 浩志 前川 麻弥 鈴木 克裕 川本 範之 山地 松夫 佐藤 隆

出版者

日本質量分析学会

雑誌

Journal of the Mass Spectrometry Society of Japan (ISSN:13408097)

巻号頁・発行日

vol.51, no.1, pp.205-215, 2003 (Released:2007-10-16)

参考文献数

4

被引用文献数

3 2

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The purpose of this study is to estimate the amounts of kerosene poured at the scene of arson. Several analytical methods have been carried out to detect kerosene in fire debris. There is no study to compare the methods quantitatively. First we discussed comparison about several analytical methods, and got the conclusion that the most sensitive method was found to be the analysis using gas chromatography/mass spectrometry (GC/MS) after extracting by ether. The detection limit of this methed was 0.05 µg/g.The kerosene concentration of tatami had an effect on the condition of combustion. We estimated the diffusion speed of kerosene sprinkled on tatami. We conducted experiments to check the condition of tatami burning, due to the amount of kerosene. Furthermore, we showed the evidence to get fire debris from the inside not the surface to get information about the kerosene amount.

著者

澤 竜一

出版者

日本質量分析学会

雑誌

Journal of the Mass Spectrometry Society of Japan (ISSN:13408097)

巻号頁・発行日

vol.64, no.3, pp.101-104, 2016-06-01 (Released:2016-06-15)

参考文献数

19

著者

中山 洋

出版者

日本質量分析学会

雑誌

Journal of the Mass Spectrometry Society of Japan (ISSN:13408097)

巻号頁・発行日

vol.64, no.3, pp.105-109, 2016-06-01 (Released:2016-06-15)

参考文献数

25

著者

石黒 正路

出版者

一般社団法人 日本質量分析学会

雑誌

Journal of the Mass Spectrometry Society of Japan (ISSN:13408097)

巻号頁・発行日

vol.47, no.3, pp.135-139, 1999 (Released:2007-10-16)

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Computational methods for drug design and its application for structure-based drug design using crystallographic data and NMR solution structural data were briefly described in view of interaction of ligands with or without structures of the target receptors. Analysis of the hydrolytic mechanism of β-lactamases whose 3D stuctures has been known led to understanding a specific recognition of β-lactam antibiotics and to design of a new candidate for anti-MRSA antibiotics. Conformational analysis of peptide derivatives whose receptor structures have not known is the other example for design of new skeletons of nonpeptide compounds. Receptor-bound structure analysis of antagonist or agonist peptides suggested different conformations of the peptides. This may be due to a different receptor structure as a consequence of a large structural change of receptors upon binding of agonists.

著者

中山 登 西村 俊秀

出版者

日本質量分析学会

雑誌

Journal of the Mass Spectrometry Society of Japan (ISSN:13408097)

巻号頁・発行日

vol.64, no.2, pp.65-69, 2016-04-01 (Released:2016-04-15)

参考文献数

20

著者

平山 明由 曽我 朋義

出版者

日本質量分析学会

雑誌

Journal of the Mass Spectrometry Society of Japan (ISSN:13408097)

巻号頁・発行日

vol.64, no.2, pp.61-64, 2016-04-01 (Released:2016-04-15)

参考文献数

12

被引用文献数

1

著者

川村 猛

出版者

日本質量分析学会

雑誌

Journal of the Mass Spectrometry Society of Japan (ISSN:13408097)

巻号頁・発行日

vol.64, no.2, pp.75-79, 2016-04-01 (Released:2016-04-15)

参考文献数

27

著者

中根 良平 栗原 修

出版者

日本質量分析学会

雑誌

Journal of the Mass Spectrometry Society of Japan (ISSN:13408097)

巻号頁・発行日

vol.11, no.24, pp.167-172, 1964-03-30 (Released:2010-06-28)

参考文献数

20

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The values of single-stage separation factor for the boron isotope exchange between boron fluoride gas and its weak complexes that are stable only at low temperatures are determined by means of the shaking-type gas-liquid contactor and mass spectrometer.