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

Creators: Yu, Weilai; Lewis, Nathan S.; Gray, Harry B.; Dalleska, Nathan F.

Abstract

Ammonia (NH₃) is essential for food production and is commercially synthesized from nitrogen (N₂) and hydrogen (H₂) using the Haber–Bosch process. Enormous 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.

Additional Information

© 2020 American Chemical Society. Received: March 2, 2020; Accepted: April 6, 2020; Published: April 16, 2020. Acknowledgement is made to the donors of The American Chemical Society Petroleum Research Fund for partial support of this research. This work was also supported by the Office of Science of the U.S. Department of Energy under Award Number DE-SC0004993. N.F.D. is grateful to the Linde Center for support. The Environmental Analysis Center is grateful for support from the Beckman Institute at Caltech. Dr. Fabai Wu and Prof. Victoria Orphan are thanked for providing the ¹⁵NH₄Cl standard sample. Mr. Christopher Kenseth is thanked for assistance with UPLC-MS analysis. Dr. Yuanlong Huang is thanked for fruitful discussions. Views expressed in this Viewpoint are those of the authors and not necessarily the views of ACS. The authors declare no competing financial interest.

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