separated-local-field nuclear magnetic resonance spectroscopy 15N separated-local-field nuclear magnetic resonance spectroscopy CHMO:0000911 15N separated-local-field NMR 15N SLF NMR 2D 15N SLF A two-dimensional NMR experiment which exploits the differential dipolar couplings which 15N nuclei exhibit to their neighboring protons within local magnetic fields. The experiment consist of two time intervals: during the first time period the dipolar couplings are encoded in the NMR signal, while in the detection period the signals of different nuclei are separated on the basis of their differences in chemical shift.