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Stable Isotope Geochemistry <[log in to unmask]>
Date:
Tue, 26 Sep 2006 13:53:03 +0100
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From:
Dr W Meier-Augenstein <[log in to unmask]>
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Queen's University Belfast
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Dear Ildiko,


Have a look at the attached paper by Renee Brooks. Probably more relevant to
your question would be the paper by the BEVAPS lab in Ispra published in
RCM, 19, 701-705 (2005).

However, you may wish to read the latter rather carefully with regards to
chromatographic method and 'validation'. Fortuitously, the potential issues
there had no impact on the results presented. I will send you a PDF directly
since its file size exceeds the maximum message size allowed by the list
server.

CO2 of 99.995% purity sold in the UK by Air Products usually exhibits a
d13C-value of -32 o/oo give or take 2 o/oo but don't treat this as a typical
value. CO2 for SFC application tends to be 'heavier' in 13C and it would
appear one can find technical CO2 that's quite depleted in 13C.


Regards,

Wolfram
 

> -----Original Message-----
> From: Stable Isotope Geochemistry 
> [mailto:[log in to unmask]] On Behalf Of Gergely Ildikó
> Sent: 26 September 2006 21:14
> To: [log in to unmask]
> Subject: 13C/12C isotope values of technical CO2
> 
> Dear all,
> 
> Could anybody help us with some information, articles about 
> the 13C/12C isotope values of technical carbon-dioxide used 
> in Germany and/or other European countries? We try to measure 
> CO2 from different type of beers. Has anybody experience in 
> this field?
> Thank you in advance.
> 
> 
> 
> 
> Ildiko Gherghely
> Chemical Institute of the
> Hungarian Customs and Finance Guard
> H-1163 Budapest
> Hosok fasora 20-24
> tel: +36 1 4035092/28 ext
> fax: +36 1 4035090
> 


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