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

doi:10.2116/analsci.15.513

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

Material Science of Solar Planets

Research output: Contribution to journal › Article › peer-review

6 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	513-516
Number of pages	4
Journal	analytical sciences
Volume	15
Issue number	6
DOIs	https://doi.org/10.2116/analsci.15.513
Publication status	Published - Jun 1999

All Science Journal Classification (ASJC) codes

Analytical Chemistry

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

abstract = " 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. ",

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AU - Notsu, Kenji

AU - Wakita, Hiroshi

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