Dear Everyone,

I am attempting to analyze 13C at concentrations ranging from atmospheric
(about 400 ppm) to about double that (800 ppm) on a Europa Geo 20-20 with an
ANCA gsl prep unit.  Is there an EASY way to concentrate the CO2 for
analysis (in any form - gas, liquid or solid).  Tests on ambient air suggest
the gas needs to be concentrated at least 100 times for good precision.  My
first thought was to use KOH, but there seem to be too many problems with
preventing asorption of unwanted CO2 while in storage or transfer.  Any help
would be greatly appreciated.

Lola Oliver




Lola K. Oliver, Supervisor
Forest Soils Laboratory, P.O. Box 757200
University of Alaska Fairbanks
Fairbanks, AK  99775-7200
(907) 474-7114, FAX (907) 474-6184
e-mail [log in to unmask]