Hi,
 
I need to do some determinations of 15N by EA-IRMS in lamb meat samples and I would like to know what standards you suggest . I have IAEA-N1 and IAEA USGS25. Please tell me what do you think about these ones and for secondary standards what can I use (with good repeatability).
 
Thank you very much for your attention.
ana 
 
 
 
 
 
 
 
Ana Isabel Janeiro
INETI - DTIQ - LAQAS
Estrada do Pašo do Lumiar, 22
1648 - 039 - Lisboa - Portugal
Tel.: +351 217165141 - ext 2671/73
Fax : +351 217168100
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