Experimental aspects of solid-state nuclear magnetic resonance (NMR) in quadrupolar spins with variable superconducting magnets are described. In particular, solid-state ³³S NMR experiments using ³³S-enriched organosulfur compounds, including field-swept types and frequency-swept types in an extremely low magnetic field, are given. An overview of an on-going research project to develop a highly-sensitive field-swept NMR method that can measure ALL atoms in the periodic table is also introduced.