Method for representing biologically activated inductance-altering particles anddevice for carrying out the method

According to the inventive method for representing biologically activated inductance-altering particles, especially ferromagnetic or superparamagnetic particles, monovalent primary antibodies, viruses or DNA probes are mixed with inductance-altering particles in excess, the latter being coated with secondary antibodies. Aggregated particles are then separated by partial sedimentation, said aggregated particles consisting of a monovalent primary antibody and antibody-coated inductance-altering partial particles. A detecting and counting device for suspended biological microparticles in liquid samples has a delivery line (16) for a sample to be measured which is configured as a measuring line (34) and surrounded by a metal coil which is configured as a measuring coil (36a). The measuring coil is connected to a device (46) for exciting oscillation and measuring resonance events. The metal coil (36a) is placed around a core (50) which is bent approximately into a C shape and which has a gap (52) through which the measuring line (34) is guided.