Receptivity (NMR)

In NMR spectroscopy, receptivity refers to the relative detectability of a particular element. Some elements are easily detected, some less so. The receptivity is a function of the abundance of the element's NMR-responsive isotope and that isotope's gyromagnetic ratio. Some isotopes, tritium for example, have large gyromagnetic ratios but low abundance. Other isotopes, for example ¹⁰³Rh, are highly abundant but have low gyromagnetic ratios. Widely used NMR spectroscopies often focus on highly receptive elements: ¹H, ¹⁹F, and ³¹P.