- The atomic nucleus of the material placed in the magnetic field resonates with the Rapio wave of its nuclear natural frequency and absorbs radio waves as it transitions from the low-energy nuclear spin state to the high-energy nuclear spin state.

- Bruker, AVANCE NEO 400

- Mainly used for molecular structure analysis and quantitative analysis of organic substances, inorganic substances, and polymer compounds.

- https://www.dropbox.com/sh/k40mce89z25ynpm/AABeygR8KYXPKtuAjAZ7-Hjua?dl=0