Hi Chris,
Have you tried CAC gas? I have only used them for mixes or natural abundance references but they may be able to assist.
http://www.cacgas.com.au/cac-gas-leaders-in-calibration-gas-solution

Cheers,
Sam


Sam Poynter PhD, MRACI CChem |  Senior Analyst
Soils Node, TrACEES Platform  |  Faculty of Veterinary and Agricultural Sciences

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From: Stable Isotope Geochemistry [mailto:[log in to unmask]] On Behalf Of Christian Dietz
Sent: Tuesday, 29 August 2017 5:19 PM
To: [log in to unmask]
Subject: [ISOGEOCHEM] CO2 gas with d13c around 2 permill?

hi all,
does anyone know of a CO2 gas supplier for CO2 with d13C around +2 permill?
At best here in Oz, but any information is very much appreciated.
cheers
Chris

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