Announcements - JST

ANALYTICAL SCIENCES FEBRUARY 2017, VOL. 33 253

2017 © The Japan Society for Analytical Chemistry

2017March 5 – 9(Chicago, USA)The Pittsburgh Conference 2017 (Pittcon 2017).Contact: The Pittsburgh Conference Office, 300 Penn Center Boulevard, Suite 332, Pittsburgh, PA 15235-5503, USA (e-mail: [email protected]; Website: http://pittcon.org/pittcon-2017/).

May 5 – 8(Hainan, China)IUPAC International Congress on Analytical Sciences 2017 (ICAS 2017).Contact: Secretary of ICAS 2017 (e-mail: [email protected]; Website: http://www.chemsoc.org.cn/meeting/icas2017/).

May 27 – 28(Kyoto, Japan)The 77th Symposium of the Japan Society for Analytical Chemistry.*

Sep. 9 – 12(Tokyo, Japan)The 66th Annual Meeting of the Japan Society for Analytical Chemistry.*

Oct. 9 – 13(Tsukuba, Japan)The 14th International Symposium on Biomineralization (BIOMIN XIV).Contact: Dr. H. Nagasawa, Department of Applied Biological Chemistry, The University of Tokyo (e-mail: [email protected]).

Nov. 12 – 17(Shimane, Japan)7th Asia-Pacific Winter Conference on Plasma Spectrochemistry (APWC 2017).Contact: Discussion Group for Plasma Spectrochemistry (e-mail: [email protected]).

*Contact: The Japan Society for Analytical Chemistry, 1-26-2 Nishigotanda, Shinagawa, Tokyo 141–0031, Japan.

Announcements

254 ANALYTICAL SCIENCES FEBRUARY 2017, VOL. 33

BUNSEKI KAGAKUVol. 66 No. 2 February, 2017

Special Articles: New Phase of Micro Organic Analysis

Technical PapersSimultaneous Determination of Potassium, Magnesium and Calcium in Milk byIon Chromatography Arata Asada, Kenji Yoshikawa, Akio Sakuragawa and Hisomu Nagashima 67Simultaneous and Quantitative Analysis of 5 Elements (S, F, Cl, Br and I) byImproving Elemental Analyzer Keiko Bando and Junetsu Igarashi 73Rapid and Simultaneous Micro-analysis of Halogens and Sulfur inOrganic Compounds by Combustion–Ion Chromatography Hisomu Nagashima and Yoshimi Dewa 81

NotesSeparation Analysis of Amyloid Fibrils Utilizing a PTFE Tube as a Separation Field Hiromichi Asamoto, Kyosuke Nagashima, Tatsuro Nakagama, Kazunori Saitoh and Hiroaki Minamisawa 89

Research PapersLong-range Transport Mechanism of Cadmium, Lead and Nonseasalt-sulfate Ion in Fresh Rime and Fresh Snow Collected on the Summit of Mt. Kajigamori, Kochi Prefecture, Japan during the 2008 – 2014 Winter Season Shoji Imai, Yuhei Yamamoto, Yusuke Sanagawa, Yuhya Kurumi, Isao Kurotani, Jun Nishimoto and Yoichi Kikuchi 95

NotesLaser Desorption Ionization Mass Spectrometry of Pentacene Using 2-step ExcitationEnergy Transfer from Anthracene Yosuke Fujii and Tatsuya Fujino 115

Digest of Doctoral DissertationSpectroelectrochemical Studies of Molecular Association with Polyamidoamine Dendrimers at Liquid | Liquid Interfaces Hiroki Sakae 121Development of Rapid Analytical Method for Radioactive Samples byCapillary Electrophoresis with Absorbance and Fluorescence Detection Tomoko Haraga 123



We are pleased to announce that Analytical Sciences administers the abstracts of selected papers published in Bunseki Kagaku. Bunseki Kagaku is an article magazine (monthly publication in Japanese) of The Japan Society for Analytical Chemistry. Bunseki Kagaku publishes peer-reviewed original, technical and review articles, analytical data and techno reports that pertain to various aspects of analytical chemistry. The insertion of the abstracts in Analytical Sciences will help readers all over the world to be aware of recent advances in all fields of analytical chemistry. (The editorial committee of Bunseki Kagaku)

B U N S E K I　K A G A K UVol. 66　No. 2　February, 2017

Rapid and Simultaneous Micro-analysis of Halogens and Sulfur in Organic Compounds by Combustion - Ion Chromatography

Hisomu NAGASHIMA＊1 and Yoshimi DEWA

2

＊ E-mail : [email protected] 1 NAC Techno service Co., Ltd., Fujigin bldg. 2F, 4-16-6, Kamisaginomiya, Nakano-ku, Tokyo 165-0031 2 Yanaco Co., Ltd., 145, Hiratuka-cho, Shimotoba, Fushimi-ku, Kyoto 612-8387

(Received October 24, 2016; Accepted December 26, 2016)

A method for the rapid and simultaneous micro-analysis of organic halogens and sulfur that employs a novel coupled combustion - ion chromatography (IC) apparatus is described in detail. The cost has been decreased by switching from argon (helium) - oxygen for the carrier gas to cleaner air. In addition, a standard sample that contained 4 halogens and sulfur was developed concerning the making of calibration curves. A sample of 1.0–10 mg (micro) or 0.1–1.0 mg (ultra-micro) was weighed and ignited in a quartz combustion tube at 1000 °C. The combustion products were collected in a 40 mL (total volume) of mixed solution of very tin hydrogen peroxide and hydrazine hydrate. After a 50 μL aliquot of each sample solution was injected into a suppressed conductivity IC system. The calibration curves of the peak areas of each element (F, Cl, Br, I and S) were obtained from the combustion standard (NAC-st4: C12H7NO2FClBrIS) with high correlation coefficients (r 2) of more than 0.999. The 5–6 samples per one hour were able to be analyzed by this combustion/IC system within 0.3 % of the theoretical values.

Keywords: rapid and simultaneous micro-analysis; organic halogens; organic sulfur; automatic combustion-ion chromatography.

技術論文　 87長嶋，出羽 : 燃焼イオンクロマトグラフィーによる有機化合物中のハロゲン及び硫黄の高速一斉分析

BUNSEKI KAGAKU　Vol. 66, No. 2, pp. 81–87（2017）

256 ANALYTICAL SCIENCES FEBRUARY 2017, VOL. 33

94 B U N S E K I　K A G A K U Vol. 66 （2017）

Separation Analysis of Amyloid Fibrils Utilizing a PTFE Tube as a Separation Field

Hiromichi ASAMOTO＊1, Kyosuke NAGASHIMA

2, Tatsuro NAKAGAMA2,

Kazunori SAITOH2 and Hiroaki MINAMISAWA

1

＊ E-mail : [email protected] 1 Department of Liberal Arts and Basic Science, College of Industrial Technology, Nihon University, 2-11-1,

Shinnei, Narashino-shi, Chiba 275-8576 2 Department of Applied Molecular Chemistry, College of Industrial Technology, Nihon University, 1-2-1,

Izumicho, Narashino-shi, Chiba 275-8575

(Received September 23, 2016; Accepted November 18, 2016)

We developed an easy-to-use analytical method for amyloid fibrils by high-performance liquid chromatography (HPLC) with post column fluorescent labeling. Thioflavin T (Th T), which was used widly as a labeling agent for amyloid fibrils, is a traditional probe for the confirmation of amyloid fibril formation. Although the traditional fluorescence spectroscopy measurements are used for monitoring the aggregation reaction, they have no applicability to separation analysis of the amyloid fibrils. In order to understand the fibril formation process, the development of an efficient method that enables to separate and detect the amyloid fibrils is required. In this work, Th T labeling of amyloid fibrils in 1 mM hen egg white lysozyme (HEWL) solution was performed following separation of different-sized amyloid fibrils in a PTFE tube (5000×0.50 mm i.d.) as a separation field. The fluorescence was monitored at 485 nm, with the maximum excitation wavelength at 435 nm. The novel method's sensitivity for the detection of amyloid fibrils was high and compared well with the traditional fluorescence spectroscopy measurements. In addition, the developed method detected more than 5 peaks within 20 min under the optimum separation conditions. These results suggest that this analytical method is used to understand the amyloid fibril formation process.

Keywords: amyloid fibril; HPLC-fluorescence detecion; PTFE tube.


Laser Desorption Ionization Mass Spectrometry of Pentacene Using 2-step Excitation Energy Transfer from Anthracene

Yosuke FUJII1 and Tatsuya FUJINO

＊2

＊ E-mail : [email protected] 1 Department of Chemistry, Graduate School of Science and Engineering, Tokyo Metropolitan University, 1-1,

Minami-Osawa, Hachioji-shi, Tokyo 192-0397 2 Department of Applied Chemistry, Graduate School of Science and Engineering, Toyo University, 2100,

Kujirai, Kawagoe-shi, Saitama 350-8585

(Received November 9, 2016; Accepted December 14, 2016)

Laser desorption/ionization mass spectrometry was performed to one of polycyclic aromatic hydrocarbons (PAHs), pentacene (Pen), doped in mixed crystals of anthracene (Ant) and tetracene (Tet). By changing the mixing ratio of molecules, it was understood that Pen was ionized efficiently by 2-step excitation energy transfer among three molecules when the molar amount of Pen was more than –10 times larger than that of Tet. Possible mechanism of energy transfer was discussed.

Keywords: PAHs; laser desorption/ionization mass spectrometry.

ノート　 119藤井，藤野 : 2-Step励起エネルギー移動を利用したペンタセンのレーザー脱離イオン化質量分析法



X-ray Structure Analysis Online Vol. 33, Part 1 (pp. 1 – 4)The Japan Society for Analytical Chemistry’s electronic-only journal for the concise crystal structure reports on all classes of compounds. Our webpage, http://www.jsac.or.jp/cgi-bin/xraystruct/toc/.

X-ray Struct. Anal. Online, 2017, 33, 1.

Synthesis and Crystal Structure of N,N′-Bis(2-hydroxy-3,5-dimethylbenzyl)-N,N′-dimethyl-1,2-ethanediamine

Masahiro MIKURIYA, Iyo MATSUSHIMA, Yukiko HANAMOTO, and Daisuke YOSHIOKA

X-ray Struct. Anal. Online, 2017, 33, 3.

Crystal Structure of (Z)-1-[4-(Trifluoromethyl)-benzylidene]thiosemicarbazide

Uwaisulqarni M. OSMAN, Azieda Syafika N. FARIZAL, Suhana ARSHAD, and Maisara Abdul KADIR


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