Abstract
To examine on accuracy for data in natural gases and cuttings ones, some problems on sampling vessels, preservation period of small amounts of gases for stable isotope mass spectrometry and carbon dioxide preparation were discussed.As sampling containers, Tedlar bags, Teflon, polyethylene and glass were used. As the results, components in standard methane (δ13C: -65.4‰), changed to -58.2‰ in Tedlar bags, to -62.4‰ in Teflon, to -63.7‰ in polyethylene vessels, while not in glass vessels after one month. When production gas is used as a sample, the change of components showed same tendency as above.Residual gases in carbon dioxide preparation stage, especially from preceding concentrated gases, affected much on successive determinations.In 13C stable isotope ratio mass spectrometry, attentions should be on sampling vessels and on excluding residual gases in carbon dioxide preparation stage. Glass bottles are the most favourable for sampling and preservation of gases for the analysis.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Journal of the Japanese Association for Petroleum Technology
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
