Principle of nuclear magnetic resonance technology
The basic principle of NMR is to use electromagnetic waves of a certain frequency to irradiate nuclei in a magnetic field. The nuclei generate magnetic resonance under the action of electromagnetic waves, absorb the energy of the electromagnetic waves, and then emit electromagnetic waves, that is, send out magnetic resonance signals. Since different nuclei absorb and radiate electromagnetic waves at different frequencies, and this frequency is also related to the nuclear environment, it is possible to analyze the structural components and density distribution of substances based on magnetic resonance signals.