NMR Service Consulting 1 article published in JoVE Chemistry Application and Methodology of the Non-destructive 19F Time-domain NMR Technique to Measure the Content in Fluorine-containing Drug Products Maria Victoria Silva Elipe1, Lan Li1, Karthik Nagapudi2, Alan M. Kook3, Carlos Cobas4, Isaac Iglesias4, Chen Peng4 1Department of Attribute Sciences, Amgen, Inc., 2Small Molecule Pharmaceutical Sciences, Genentech, Inc., 3NMR Service + Consulting, 4Mestrelab Research A simple and non-destructive technique that measures the average content of drug substances in formulated drug products containing fluorine using low-field fluorine-19 (19F) time-domain (TD) nuclear magnetic resonance (NMR) is presented here. The technique can be applied to the development and manufacturing of drugs in the pharmaceutical industry.