I have samples (soil, leaves and roots) that have highly enrichment in
15-nitrogen. I have to measure them in the IRMS equipment, but I can
not measured directly in such equipment because I can contaminate it
(cup and reactor). Then I would like to dilute the sample with other
compound containing nitrogen (14 nitrogen) in order to decrease the
15N value. Do you know with compound is useful to reach lower 15N value?
The best regards