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Dear Darren (and others),
I would be very much interested in hearing your
experience doing mineral samples by EA-pyrolysis,
particularly your hydrogen set up and results (I
assume that the O mentioned refers to the
hydration oxygen). We attempted long ago to use
an EuroVector+Isoprime, but got erratic results,
so I abandoned. But it would certainly be most
helpful to be able to do at least Hydrogen ...
Thanks,
Clemente
>Dear Colleagues
>
>Looking through the Isogeochem archives there
>was a discussion back in 2001 on the dD of NBS
>30 (see one such message below). We have been
>analyzing NBS 30 here using our TCEA and the
>results compared to our other internal and
>international standards are not very good. Have
>I missed some vital information around the
>community about analyzing NBS 30 for dD and d18O
>using a TCEA? We are getting good results for dD
>but not for d18O.
>
>Thanks
>
>Darren
>
>>Subject:
>>Re: delta D of NBS-30
>>From:
>>Willi A. Brand
>>Reply-To:
>>Stable Isotope Geochemistry <[log in to unmask]>
>>Date:
>>Mon, 10 Sep 2001 08:13:51 +0200
>>Content-Type:
>>text/plain
>>
>>Hi,
>>a number of years ago, during the early stages of high temperature
>>pyrolysis developments at Finnigan I ran NBS30 at the 1-5-milligram
>>level and got astonishing results. I do not recall the exact numbers but
>>I had two distinct cluster values. My conclusion at the time was that
>>the material was not homogeneous at the single grain level and I
>>discontinued using it for the purpose. Has anyone experienced something
>>similar?
>>Willi
>>--
>>
>>Willi A. Brand, Stable Isotope Laboratory [log in to unmask]
>>Max-Planck-Institute for Biogeochemistry
>>Carl-Zeiss-Promenade 10, 07745 Jena, Germany Tel +49-3641-643718
>>P.O.Box 100164, 07701 Jena, Germany Fax: +49-3641-643710
>>http://www.bgc-jena.mpg.de/pages/public/Iso+Gas-Lab/BGC_Gaslab.html
>>http://www.bgc-jena.mpg.de/pages/public/Iso+Gas-Lab/BGC_Isolab.html
>>
>
>
>Dr Darren Grocke
>Associate Professor & Director of SIBL
>
>Stable-Isotope Biogeochemistry Laboratory (SIBL)
>McMaster University
>School of Geography & Earth Sciences
>1280 Main Street West
>Hamilton, Ontario, L8S 4K1
>Canada
>
>http://www.science.mcmaster.ca/geo/research/sibl/index.html
>Phone: 905 525 9140 ext. 26334
>Fax: 905 546 0463
--
*******************************************
Dr. Clemente Recio
Laboratorio de Isσtopos Estables
Fac. de Ciencias
Univ. de Salamanca
Plaza de la Merced, S/N
E-37008 SALAMANCA
SPAIN
Phone: (+34) 923 29 45 00, Ext. 1540 (Automatic Switchboard)
Fax: (+34) 923 29 45 14
E-mail: [log in to unmask]
Web page: http://www.usal.es/isotopos
*******************************************
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