The IAEA NGS isotopic standard gases are now maintained by the Atmospheric
Chemistry Group at NIST.  You can get  information (packaging, cost,
availability, references, etc) by contacting me directly.

--Mike


At 06:49 PM 2/21/97 +0900, you wrote:
>
>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.
>
>Sincerely,
>
>
>Nori Tanaka
>
> 
>-------------------

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Dr. R. Michael Verkouteren
B364, Chemistry Building (222)
National Institute of Standards & Technology
Gaithersburg, Maryland   20899   USA
301-975-3933 (telephone)                                      
301-216-1134 (facsimile)                                       
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