Kajian Isotop Karbon CO2 dan CH4 di Wilayah Barat Pegunungan Dieng dengan Gas Chromatography-Isotope Ratio Mass Spectrometer (GC-IRMS)
ABSTRACT: The carbon isotope
can be used to evaluate volcanism phenomenon of volcano. The study of carbon isotope
of CO2 and CH4 was carried out in western Dieng Plateau by mass-spectrometer.
Before analysis, sampel was separated by gas chromatography using a Porapak-Q
column and a FID (Flame Ionization Detector) detector. The gas was oxidized by
copper oxide at 850oC before being ionized in mass-spectrometer for
isotope analysis.
The CO2 content in Candradimuka crater (–4.10 O/OO), indicated that the
gas may be as volcanic gas. The other CO2 from Sumber and western Gua Jimat,
had isotope value of -10.05 and
-12.07 O/OO, respectively, indicating
contamination from crustal and subduction material. The carbon isotope of
CH4 gas from Pancasan village was -63.42
O/OO, that may be categorized as biogenic gas.
Penulis: Hanik Humaida
Kode Jurnal: jpkimiadd050017
