δ15N measurement of organic and inorganic substances by EA-IRMS: a speciation-dependent procedure.

@article{Gentile201315NMO,
  title={δ15N measurement of organic and inorganic substances by EA-IRMS: a speciation-dependent procedure.},
  author={Natacha Gentile and Michel J Rossi and Olivier Del{\'e}mont and Rolf T W Siegwolf},
  journal={Analytical and bioanalytical chemistry},
  year={2013},
  volume={405 1},
  pages={159-76}
}
Little attention has been paid so far to the influence of the chemical nature of the substance when measuring δ(15)N by elemental analysis (EA)-isotope ratio mass spectrometry (IRMS). Although the bulk nitrogen isotope analysis of organic material is not to be questioned, literature from different disciplines using IRMS provides hints that the quantitative conversion of nitrate into nitrogen presents difficulties. We observed abnormal series of δ(15)N values of laboratory standards and nitrates… CONTINUE READING
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