Isotopically Selective Quantification by UPLC-MS of Aqueous Ammonia at Submicromolar Concentrations Using Dansyl Chloride Derivatization

Ammonia (NH3) is necessary for food production and is commercially synthesized from nitrogen (N2) and hydrogen (H2) using the Haber–Bosch process. Significant amounts of ammonia are made every year in a reaction that requires high temperatures and pressures, with the Haber–Bosch accounting for ~1.6% of total annual global energy consumption. Electrocatalysts are also being explored to convert in an environmentally friendly manner N2 to NH3 at ambient temperature and pressure.