JMSSJ On-line

JMSSJ On-line, Vol. 42 (1994) No. 2, pp. 105-115

A New Compact Size, Precision Mass Spectrometer by Ion Cyclotron Resonance		>> Full Text PDF >> References
*Hiromi YAMAZAKI,^a) Makoto TSUNEDA,^a) Yasusi TAKAKUWA,^a) Yoshihisa HONDA,^a) Atsushi NUKANOBU,^a) Hideya SAKURAI,^b) and Kazuo NAKAGAWA^a)** ^a) Shizuoka Plant, NIKKISO Co., Ltd.* (498-1, Shizutani, Haibara-cho, Haibara-gun, Shizuoka 421-04, Japan) ^b) Yamazaki Works, Sumitomo Special Metals Co., Ltd.* (2-15-17 Egawa, Shimamoto-cho, Mishima-gun, Osaka 618, Japan)

Because the resolution of Fourier transform ion cyclotron resonance (FT-ICR) mass spectrometers is inversely proportional to the mass of ion, they are particularly suited to the analysis of low mass samples. For this purpose the magnetic field generated by permanent magnets is adequate. The spectrometer using a permanent magnet has the advantages of low cost, compact size and easy operation and maintenance. These features have motivated us to develope a new FT-ICR spectrometer with a permanent magnet which can determine chemical composition of samples by precise mass measurement. The magnet is made of rare-earth compound and the magnetic circuit is designed to be compact and to generate a highly homogeneous magnetic field. The spectrometer can be easily operated with a track-ball and a ten-key board. Mass resolution of 10⁴-10⁵ is obtained in the normal operating conditions. It is shown that the spectrometer can analyse the composition of gases having the same mass numbers such as CO/N₂/C₂H₄, CO₂/N₂O and He/D₂. The spectrometer will be useful for industrial applications like process and medical analyses.

Key words: FT-ICR, Mass spectrometer, Ion cyclotron resonance, Permanent magnet, Gas analysis

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