Nitrogen isotope analysis of aqueous ammonium and nitrate by membrane inlet isotope ratio mass spectrometry (MIRMS) at natural abundance levels.
Jens DyckmansWolfram EschenbachReinhard LangelLars SzwecReinhard WellPublished in: Rapid communications in mass spectrometry : RCM (2021)
The presented method is capable of fast measurement of δ15 N values in ammonium and nitrate from aqueous samples with reasonable accuracy at natural abundance levels. It will thus facilitate the application of isotopic methods to studies of nitrogen cycling in ecosystems.