TY - JOUR
T1 - Carbon isotope measurement of extremely low amounts of CH
4
T2 - Application to volcanic gases from Satsuma-Iwojima, Japan
AU - Sato, Masanori
AU - Tsunogai, Urumu
AU - Ishibashi, Jun Ichiro
AU - Notsu, Kenji
AU - Wakita, Hiroshi
PY - 1999/6
Y1 - 1999/6
N2 -
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.
AB -
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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U2 - 10.2116/analsci.15.513
DO - 10.2116/analsci.15.513
M3 - Article
AN - SCOPUS:0033394299
VL - 15
SP - 513
EP - 516
JO - Analytical Sciences
JF - Analytical Sciences
SN - 0910-6340
IS - 6
ER -