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 Isótopos 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
*******************************************