著者

角田 紀子

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.53, no.3, pp.157-163, 2005 (Released:2006-04-05)

参考文献数

38

被引用文献数

1 3

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2004 was the 10th anniversary of the Matsumoto sarin incident, and 2005 is the 10th anniversary of the Tokyo Subway Attack. National Research Institute of Police Science has been engaged in forensic examinations into these incidents. Chemical analyses of the victim's blood, water, soil, and wipe samples were performed by organic solvent extraction, followed by gas chromatography-mass spectrometry with or without tert-butyldimethylsilylation. As a result, sarin and its hydrolysis products (isopropylmethyl phosphonate and methylphosphonate), derived from sarin were positively identified by their mass spectra and retention indices. Furthermore, from the chemical analysis of evidence samples taken from the scene of manufacturing plant, precusors, and byproducts corresponding to synthetic routs of sarin has been identified. This paper presents characteristics of nerve agents, sample preparation of sarin, optimization of GC-MS, and case reports from a standpoint of effectiveness of GC-MS.

著者

中沢 隆

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.66, no.6, pp.214-217, 2018-12-01 (Released:2018-12-15)

参考文献数

8

著者

日本質量分析学会企画委員会 第64回質量分析総合討論会プログラム委員会

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.66, no.1, pp.49-61, 2018-02-01 (Released:2018-02-15)

著者

津川 裕司 早川 英介 三浦 大典

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.203-209, 2017-10-01 (Released:2017-10-15)

参考文献数

20

被引用文献数

1

著者

平山 明由 和泉 自泰 松田 史生 石川 貴正 杉浦 悠毅 鈴木 隆弘

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.195-198, 2017-10-01 (Released:2017-10-15)

参考文献数

23

被引用文献数

1

著者

及川 彰 松田 史生 三枝 大輔

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.220-222, 2017-10-01 (Released:2017-10-15)

参考文献数

17

著者

吉野 健一

出版者

The Mass Spectrometry Society of Japan

雑誌

質量分析 = Mass spectroscopy (ISSN:13408097)

巻号頁・発行日

vol.56, no.2, pp.69-76, 2008-04-01

参考文献数

7

被引用文献数

1

---

The Japanese word "mirimasu" originates from the English words "milli" and "mass." It is normally used as an alias for "measured accurate mass" and "accurate mass measurement." It causes confusions that "mirimasu" is also used as an alias for "high resolution mass spectrometry," "high resolution mass spectrum (spectra)," and "mass spectrometer with high mass resolving power." This nomenclature results from the fact that "high resolution" is confused with "high accuracy." In addition to these interpretations, Japanese mass spectrometrists also use "mirimasu" as an alias for "one-thousandth of a unified atomic mass unit," "one-thousandth of a dalton (mDa)," and "one-thousandth of an <i>m/z</i> unit." This incorrect usage is due to a lack of understanding of the unit system of atomic mass and <i>m/z</i> on mass spectra. Therefore, "mirimasu" should not be used in Japanese, because it is ambiguous and involves various problems and misunderstandings.

著者

平田 利美 前川 麻弥 能美 隆

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.46, no.4, pp.259-274, 1998 (Released:2007-07-20)

被引用文献数

14 13

---

Mechanisms of pyrolysis of cellulose which have been presented are reviewed in terms of pathways of the reaction, production of levoglucosan, carbonization and pyrolysis of levoglucosan, and kinetics. In addition measurements with machines are discussed in relation to the pyrolysis. In the section of reaction pathways five models given in diagrams are introduced and indicated lack of clear chemical definition of them, and in the levoglucosan formation six principal models are briefly described, and a proposal of an ion mechanism against a radical mechanism, and different interpretations of effects of fine structures on the reaction and the chain length are pointed out to make important controversial points. In the third section changes in residue structure through carbonization are discussed, and courses of levoglucosan pyrolysis full of variety are shown and significance of researches on the pyrolysis in air is emphasized from viewpoint of fire science. In the fifth section an enormous number of kinetic data presented with different orders of reaction are shown and a kinetics is systematically developed to explain the different reaction orders. In the sixth section, the dependency of data on individual instruments are revealed in the measurement with instruments problems involved in analytical pyrolysis. Understanding of the implication and reasonable choice of the data is shown to be important.

著者

脇坂 昭弘 古賀 健司 竹尾 陽敏

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.45, no.2, pp.125-136, 1997 (Released:2007-07-20)

---

Clusters, ensemble of atoms and/or molecules with less number enough to form stable bulk, are thought to play important roles in various phenomena such as, crystallization, phase separation, chemical reactions, etc. Several techniques to produce clusters have been developed and studies in this field are becoming active. Two new methods to produce clusters and the investigations on their characteristics are described in this paper. One is the characteristics of clusters formed from liquid (solution), and the other is the formation and the stabilization of clusters on the surface and their structural investigation.

著者

Anthony T. TU

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.44, no.3, pp.293-320, 1996 (Released:2007-07-20)

被引用文献数

22 25

---

Nerve gas is a major chemical agent stockpiled as a chemical arsenal. Nerve gas was used in actual combat in the Iran-Iraq war and also in the insurgent war against Kurd minorities in Iraq. Recently, a nerve gas, sarin, was used massively against a defenseless public in Matsumoto and in Tokyo, causing a large number of deaths and injuries. This marked the first use of chemical weapons in a noncombat situation by a terrorist group. Information on nerve gas is relatively scarce; it is not easily accessible to most people. A systematic summarized article like the one here should help those who are interested in an overview of scientific information on nerve gas.In this review article, an overall view of poisonous gas is first made. Then different aspects of nerve gas are discussed. Toxicology, treatment, detection, decontamination and control of precursors are also reviewed.

著者

吉野 健一

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.62, no.5, pp.61-64, 2014-10-01 (Released:2014-10-15)

参考文献数

7

---

IUPAC (International Union of Pure and Applied Chemistry) recommends that a hyphen, or, alternatively, a slash, should be used to indicate a combination of two analytical techniques such as liquid chromatography separation combined with mass spectrometry detection, in the last definitions of terms relating to mass spectrometry. Thus, such combined methods can be written as liquid chromatography-mass spectrometry or alternatively liquid chromatography/mass spectrometry. The corresponding abbreviations are LC-MS or LC/MS.

著者

鳥巣 哲生 尾山 博章 内山 進

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.66, no.6, pp.218-221, 2018-12-01 (Released:2018-12-15)

参考文献数

11

著者

吉野 健一

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.56, no.4, pp.209-213, 2008-08-01 (Released:2008-08-15)

参考文献数

6

被引用文献数

1 1

---

Mass spectrometers separate ions according to each mass/charge value, which is not a dimensionless quantity. However, the m/z value indicated in the abscissa of mass spectra is defined as a dimensionless quantity and not a numerical value the same as the mass/charge value in kilograms/coulombs (kg/C) or in unified atomic mass units/coulombs (u/C). The numerical value of m/z converted from the mass/charge value depends on the unified atomic mass unit and the physical constant “elementary charge,” e that is also the atomic unit of charge. This conversion confuses many mass spectrometrists with regard to the abscissa labeling of mass spectra, e.g. the symbol “m/z” is considered as an abbreviation of the term “mass-to-charge ratio.”

著者

絹見 朋也 原本 悦和 稲垣 英利 茂里 康

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.71, no.2, pp.79-80, 2023-06-01 (Released:2023-06-15)

参考文献数

5

著者

荒川 隆一

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.46, no.3, pp.219-227, 1998 (Released:2007-07-20)

被引用文献数

1 1

---

A number of polynuclear ruthenium(II), rhodium(III), and cobalt(III) bipyridine complexes have been examined by electrospray ionization mass spectrometry (ESI-MS). ESI-MS is shown to be a powerful tool for the identification of polymetallic complexes and for detecting the contamination, because ESI mass spectra for the complexes showed a simple enough mass pattern for easy structural assignment. Multiply charged ions with the charge state from 8+ to 3+ were observed in the full scan ESI mass spectra of star-burst type tetranuclear complexes denoted by [Met(II)(bpy)2B]3RuX8 (Met=Ru, Os, and bpy=2,2′-bipyridine, B=bridging ligands, X=ClO4-). Different charged ions were found to be generated by the combination of counterion loss and protonation/deprotonation at the proton site of the bridging ligand B. These ion intensities are qualitatively explained in terms of acidity of metal complexes depending upon bridging ligand structures and the charge of metal ions. Ions produced by a removal of ligands were not observed in the ESI spectra unlike the FAB spectra. For tetranuclear complexes, collision-induced dissociation (CID) of the multiply charged ions has made it clear that loss of one or more HX neutral is a major process for lower charge states, while complete fragmentation takes place for higher charge states and the fragments are based on a subunit group of [Met(II)(bpy)2B]2+. Insertion of formal O2- produced from ClO4- counterion was observed for the complexes without active protons even if low energy CID experiments, but not for the complexes with active protons. Advantages of ESI mass spectrometry are demonstrated for these polynuclear compounds and CID chemistry of the investigated ions will be discussed.

著者

中川 秀樹

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.44, no.3, pp.415-429, 1996 (Released:2007-07-20)

被引用文献数

1 1

---

Both MALDI and ESI are well-known ionization method which have been worthy of remark among mass spectrometrists. FTMS is a mass analyzer which can be used for each ionization method with very high mass resolving power and mass accuracy. Here we introduce some MALDI/FTMS and ESI/FTMS spectra with the new topics among the FTMS users. The new topics include SORI (Sustained Off-Resonance Irradiation) and QE (Quadrupolar Excitation) techniques.

著者

山垣 亮

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.70, no.4, pp.289-291, 2022-12-01 (Released:2022-12-15)

参考文献数

5

著者

鳥越 大平 髙橋 政友 中尾 素直 相馬 悠希 池田 和輝 中谷 航太 馬場 健史 和泉 自泰

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.70, no.4, pp.245-247, 2022-12-01 (Released:2022-12-15)

参考文献数

4

---

Epimetabolite is defined as analogues of known metabolites with different substructures. The rapid development of high-resolution mass spectrometry (HRMS) and some data mining tools has contributed to detecting and identifying a few epimetabolites that could play an important role as biological functions. However, almost all epimetabolites have not been identified because a generally applicable method for the comprehensive annotation of epimetabolites had not been developed. In the present study, we have proposed an advanced methodology for comprehensive structural elucidation of unidentified hydrophilic metabolites by a combination of stable isotope labeling, unified-HILIC/AEX/HRMS/MS analysis, data mining techniques, and metabolite annotation using in silico epimetabolite database (IEMDB). In fact, we successfully annotated 444 novel epimetabolite candidates in E. coli. Our method has several advantages over conventional techniques and represents a potentially useful tool for structural elucidation of comprehensive epimetabolites.

著者

津川 裕司

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.70, no.4, pp.270-273, 2022-12-01 (Released:2022-12-15)

参考文献数

5

著者

寺本 華奈江

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.70, no.3, pp.191-196, 2022-09-01 (Released:2022-09-15)

参考文献数

22

被引用文献数

1