# Calibration of the Isotope Ratio Mass Spectrometer vs. aliquots of 15N2 gas diluted in air then helium # PI: Julie Granger # Version: 2019-09-30 ========================= comment expected measured ------------------------- nd 1.2 1.16066 nd 1.2 1.10783 nd 2.5 2.83227 nd 5 5.12882 nd 10 10.1 air 0.00134689 0.00329868