The invention belongs to the technical field of nanometer material testing, and particularly relates to a magnetic
nanoparticle temperature measurement method based on
electron paramagnetic
resonance integral spectrum full-width-at-half-maximum, which comprises the following steps: measuring a paramagnetic
resonance wave spectrum of a magnetic
nanoparticle liquid sample, carrying out integration to obtain an integral spectrum, then extracting full-width-at-half-maximum information, and carrying out
temperature measurement according to the change of the full-width-at-half-maximum. A
temperature measurement model representing the relation between the
full width at half maximum and the temperature is obtained through an experiment, and then the temperature is obtained through calculation according to
full width at half maximum information of a sample to be measured. The
magnetic nanoparticles have
superparamagnetism, and the
resonance spectrum of the
magnetic nanoparticles can be easily obtained by using
electron paramagnetic resonance equipment. Research finds that under the condition that
particle size distribution of particles is fixed, spectrum full-width-at-half-maximum change after integration is only related to temperature, concentration change does not influence the spectrum full-width-at-half-maximum change, influence caused by
system noise can be partially reduced through integration operation, temperature measurement is more accurate, and therefore the method can be well suitable for life
medicine and has good application prospects. And in-vivo non-intrusive temperature measurement is carried out.