Abstract: A method and a device to identify the material type of particles in a liquid are provided. The device is a microfluidic platform with a liquid channel for the material identification of a particle, the microfluidic platform includes electrodes forming a low-frequency sensor for measuring the geometric size of a particle passing through the liquid channel and electrodes forming a high-frequency sensor for measuring the capacitance change induced by the particle in the liquid channel. The technique combined both of these measurements to extract the dielectric permittivity of the particle.