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. 2016 Jul 31;30(16):1846–1856. doi: 10.1002/rcm.7612

Figure 2.

Figure 2

Typical GC/C/IRMS chromatogram of N‐acetyl, O‐isopropyl derivatised hydrolysable soil AAs showing the ion current signals recorded by GC/C/IRMS operating for N2 (m/z 28, 29 and 30) and the ratio of m/z 28 to m/z 29 which is used to generate 15N/14N isotope ratios.