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 > > https://www.geology.ucdavis.edu/faculty/spero.php > > (530)752-3307 > Rm 3131 Earth and Physical Sciences Bldg. > > [log in to unmask] <mailto:[log in to unmask]> > > Geology Stable Isotope Laboratory: > http://stable-isotopes.geology.ucdavis.edu/ > > ********************************************** > > > >> 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 >> -- >> Please consider the environment before printing this e-mail >> >> >> >> *University of Tasmania │CSL - Isotope Ratio Mass Spectrometry* >> >> Dr. Christian Dietz, Facility Manager *│*Private Bag 74, Hobart, 7005 >> Tasmania >> >> (Tel: (+61) 3 6226 7820, cell phone: (+61) 4 9780 8570 *│*URL: >> Central Science Laboratory >> <http://www.utas.edu.au/research/central-science-laboratory> >> >> This message is intended exclusively for its adressee and may contain >> information that is CONFIDENTIAL and protected by professional >> privilege. If you are not the intended recipient you are hereby >> notified that any dissemination, copy or disclosure of this >> communication is strictly prohibited by law. If this message has been >> received in error, please immediately notify us via e-mail and delete. > -- Hilary Stuart-Williams PhD Research Officer - Stable Isotopes Farquhar Laboratory Research School of Biology Robertson Building (46) Sullivan's Creek Road Australian National University Canberra Australia ACT 2601 ------------------------ Office 61 02 6125 2099 Fax 61 02 6125 4919