Dear Trina,

I'm not sure that it is feasible to obtain reliable 13C and 18O data off
one run.
The Flash reactor column for oxygen analysis contains carbon
(nickelised) to ensure the complete conversion of sample oxygen into CO.
So while the 18O data in the produced CO will be purely from the sample
oxygen, the 13C data will be a mix of sample carbon + reactor nickelised
carbon.

I believe that you will need to carry out two analyses  -  firstly using
a pyrolysis reactor for the 18O measurement and secondly using a
combustion reactor to produce CO2 for the 13C measurement.

Regards

Jon Davies 
Technical Manager
Elemental Microanalysis Ltd.
 
Okehampton Business Park,
Exeter Rd. Okehampton,
Devon EX20 1UB  UK
 
Tel +44 (0)1837 54446
Fax +44 (0)1837 54544
www.microanalysis.co.uk





-----Original Message-----
From: Stable Isotope Geochemistry [mailto:[log in to unmask]] On
Behalf Of TRINA BOSE
Sent: 02 July 2010 09:30
To: [log in to unmask]
Subject: [ISOGEOCHEM] Flash EA CO analysis

Hi All

I would like to Analyze Carbon Monoxide extracted from wood samples
using a flash EA.
For this, I am confused about the Reactor Column
Configuration.Basically, I want to
measure carbon and oxygen isotopic compositions from the wood sample
during the same
run, i.e. by producing CO using its own Carbon and oxygen. Please help.


sincerely

Trina Bose
Research Fellow
Indian Institute of Tropical Meteorology
Dr. Homi Bhabha Road, Pashan, Pune-411008
Ph.: 020 25904430