Ha ha!

But of course you need pretty odd water to equilibrate the carbon with ;-)


On 30/08/2017 2:07 AM, Howard Spero wrote:
> We routinely make our own reference gas by dissolving carrera marble 
> in H3PO4 and collecting/purifying the CO2 through water traps.  It 
> takes a few days but is much cheaper than purchasing gas.  Freeze the 
> gas into a stainless steel cylinder that can be manufactured in any 
> metal shop.
>
> Howie
>
>
>
> **********************************************
> Howard J Spero
> Distinguished Professor
> Department of Earth & Planetary Sciences
> One Shields Ave
> University of California Davis
> Davis CA 95616
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> https://www.geology.ucdavis.edu/faculty/spero.php
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> (530)752-3307
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>
>
>> On Aug 29, 2017, at 05:00, Shane Crabtree <[log in to unmask] 
>> <mailto:[log in to unmask]>> wrote:
>>
>> We had Air Gas (part of Air Liquide) make us some +2 permil gas (13C) 
>> along with other gases.  It ended up being 1.8 permil but that works 
>> for us.
>> If you need contact information contact me direct.
>> We are in Nashville TN so I don’t know if they will ship it to you or 
>> not.
>> *From:*Stable Isotope Geochemistry 
>> [mailto:[log in to unmask]]*On Behalf Of*Christian Dietz
>> *Sent:*Tuesday, August 29, 2017 2:19 AM
>> *To:*[log in to unmask] <mailto:[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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>> *University of Tasmania │CSL - Isotope Ratio Mass Spectrometry*
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>> Tasmania
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-- 
Hilary Stuart-Williams PhD
Research Officer - Stable Isotopes
Farquhar Laboratory
Research School of Biology
Robertson Building (46)
Sullivan's Creek Road
Australian National University
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Australia ACT 2601
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