Method for detecting and/or identifying magnetic supraparticles using magnet particle spectroscopy or magnet particle imaging

A method for detecting and/or identifying magnetic supraparticles by magnetic particle spectroscopy or by magnetic particle imaging, in which

• (a) magnetic supraparticles are provided that each contains a plurality of magnetic nanoparticles and has a specific composition and/or structure,
• (b) the magnetic supraparticles are exposed to at least one magnetic field, wherein at least one voltage and/or voltage progression is/are induced in dependence on the magnetic moment of the magnetic supraparticles, with the at least one voltage and/or the voltage progression being detected as at least one measurement signal,
• (c) at least one spectrum is generated from said at least one measurement signal, which spectrum contains higher harmonics each having an amplitude and a phase, and
• (d) the magnetic supraparticles are detected and/or identified with reference to the at least one generated spectrum,
• wherein the plurality of magnetic nanoparticles comprises a plurality of types of magnetic nanoparticles
• that differ from one another at least in basic shape, and/or
• that differ from one another at least in material,
• wherein the composition and/or structure of the magnetic supraparticles are fixed such that a specific characteristic spectrum or a series of specific characteristic spectra are obtained by magnetic particle spectroscopy or magnetic particle imaging.