Recent years have seen the development of a new experimental method that overcomes these drawbacks by not requiring the use of strong magnets: zero-to ultralow-field NMR (ZULF NMR) . Chemical shifts vanish in the absence of magnetic fields, however structural elucidation and chemical fingerprint can be obtained via the dominant spin-spin J -interaction . ZULF NMR enables observation of signals through conductive material due to the ν -1/2 frequency dependence of the skin-depth in metal; the skin depth of common metals is in the µm range for radio frequencies (rf) but increases to mm for audio frequencies . Furthermore, ZULF NMR is immune to magnetic-field inhomogeneities induced by heterogeneous materials, resulting in narrow lines in the order of tens of mHz .