Carbon isotope measurement of extremely low amounts of CH 4: Application to volcanic gases from Satsuma-Iwojima, Japan

Masanori Sato, Urumu Tsunogai, Jun Ichiro Ishibashi, Kenji Notsu, Hiroshi Wakita

研究成果: Contribution to journalArticle査読

6 被引用数 (Scopus)

抄録

A preconcentration system attached to a GC/C/MS (gas chromatography/combustion/mass spectrometer) was developed to determine the carbon-isotope composition of methane in volcanic gases with extremely low concentration. With this system, we can analyze the carbon isotope ratio ( 13 C/ 12 ) of 0.7 - 6 nmol methane with a precision of ± 1.6‰, unlike other conventional methods without preconcentration (150 - 1000 nmol CH 4 with a precision of ± 0.2‰). This system was tested with volcanic gas samples from Satsuma-Iwojima volcano, suggesting a mixture of magmatic and thermogenic origins for methane.

本文言語英語
ページ(範囲)513-516
ページ数4
ジャーナルanalytical sciences
15
6
DOI
出版ステータス出版済み - 6 1999

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry

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