We use evacuated glass containers made by Labco called Exetainer System.
They are 13C and gas testing vials. We get the 10 ml size and sample with
syringes. The tops have a septum for inserting the syringe. They can be
stored for awhile. We've stored up to a couple weeks. We use these for
measurements of CO2 and methane. I believe we order them through VWR. Let
me know if you can't find them. Val Barber

>Dear all:
>We need containers for sampling and storage of CO2 gas for isotopic
>measurement.
>It will take a couple of days to bring the gas samplers from our site and
>undertake the isotopic measurement.
>Does anyone have comments about the materials of the gas samplers, and about
>the procedure for gas sampling?
>Previously, topic on materials of stopcocks is discussed on this mailing
>list.  Then we would like to know if this effect
>is detectable in carbon isotopic measurements of CO2 gas (several hundred
>ppm) stored for a week.
>Any comments are welcomed.
>
>Thanks in advance.
>Keisuke
>*********************************** In Japanese *****************
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>*****************************************************************
>Keisuke Koba (Assistant professor)
>Environmental informatics, Biosphere Informatics
>Department of Social Informatics, Graduate School of Informatics,
>Kyoto University  606-8501, Japan.
>Tel +81-75-753-3132    Fax +81-75-753-3133
>[log in to unmask] (temporal)
>http://rfecol.kais.kyoto-u.ac.jp/KOBA/kobaeng.html
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Valerie Barber
Institute of Marine Science
O'Neill 200
University of Alaska Fairbanks
Fairbanks, AK 99775
work phone (907) 474-7899
fax (907) 474-7204