In the 12 years I've been working here no one ever asked to do
N-15. Well odds were against me. Someone asked.
The materials are plant samples where the 14N/15N ratios are to
be determined at natural abundances. The samples are from a growth
Instead of reinventing the wheel, or finding the blueprints for
it, I am looking for the following info.
I have a Carlo-Erba with an off line prep system to capture the
effluents. I am presently using it for 13C and 34S. I know about
the Keljall prep methods, but I am not equiped for it. What I would
like is to find a way to trap the N2 in a sample holder from the Erba
to take to the MS. I've heard of someone using a molecular sieve, but
I have no idea what materials are used. Any info would be greatly
Also what is the best way to calibrate (ref gas, standards)????
Gilles St-Jean, U. d'Ottawa / Geologie
140 Louis Pasteur, Ottawa, Ontario, Canada, K1N 6N5
Tel: 613 562-5800 ext: 6839(Bureau / Office)
613 562-5800 ext: 6836(Lab)
Fax: 613 562-5192