Hello everybody,

I would like to measure the d15N of the aminoacids Arg and Gly (separately)
in a mixture of several aminoacids, and possibly other nitrogeneous
compounds. I guess this is possible with the GC-C-IRMS technique, but I
have never used it.

I would be very gratefull to anybody who could ask one or several of the
following questions :

- is it possible or do I have to purify Arg and Gly from my mixture before?
- what is the minimum amount of matter needed per measurement?
- who does this kind of analyses and how much does it cost?

Many thanks in advance

Sergine

Sergine PONSARD
laboratoire d'Ecologie des Populations et Communautes
UPRESA 8079
Batiment 362
Universite Paris XI
91 405 Orsay Cedex
France
Tel : 33 1 / 69 15 56 91