A method for detecting the presence of precipitants in a hydrocarbon stream, the method comprising introducing at least a portion of the hydrocarbon stream into a measurement chamber of an NMR measuring device, assaying the fluids in the chamber with proton nuclear magnetic resonance to obtain NMR signals,...http://www.google.ca/patents/US7940043?utm_source=gb-gplus-sharePatent US7940043 - NMR method of detecting precipitants in a hydrocarbon stream
