Dear Suzanne,
I would argue not to put too much emphasis on the standard measurements but to focus on the carry over because this is what will limit your measurement precision most prominently. Of
course you would check you system with some (home made, in our case) enriched standards at 5 and 10 at% for example – but I would not do this on even a daily basis. Instead, we only use non-labelled standards to see how horrible carry over is during the run.
And sorting the samples as good as possible according to expected enrichment is worth a lot.
So if you can separate natural abundance and labelled samples almost everything is just fine.
Best,
Jens
Von: Stable Isotope Geochemistry <[log in to unmask]>
Im Auftrag von ankerssm
Gesendet: Mittwoch, 1. Juni 2022 22:16
An: [log in to unmask]
Betreff: [ISOGEOCHEM] Analyzing enriched nitrogen samples
Hi All,
I have a researcher that wants to run ammonia diffusion traps for atom % 15N. Since our lab now has 2 mass specs (cheering and celebrations), I am able to experiment with tracer samples without derailing my natural abundance queue. Could
I be so lucky that someone has a "enriched nitrogen analysis for dummies" guide? I usually buy my standards but I presume I have to make them myself for this analysis. Any detailed recipes and procedures? Suggestions for publications with detailed methods
are always appreciated.
Thank you,
Suzanne
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