Dear friends of isotopes:

	Does somebody out there tell me how to obtain so-called NGS standard gases, which contain methane and some light hydrocarbons with known isotopic compositions? Thank you for any information from you in advance.


Nori Tanaka

Noriyuki Tanaka
Laboratory of Marine and Atmospheric Geochemistry(MAG)
Graduate School of Environmental Earth Science
Hokkaido University, Sapporo, 060 Japan
tel 011-706-2370
fax 011-726-6234
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