A method for analysis of a multi-component fluid is provided based on the features of the dynamics of the self-organization processes in drying drops. An electro-acoustic resonator is utilized, with a drop of multi-component fluid placed on one end of the resonator. A shear oscillation is imparting to the resonator along its longitudinal axis. And oscillating electric voltage is placed across the resonator generally perpendicular to the direction of mechanical oscillation. Changes in the electrical conductance corresponding to changes in the acoustical-mechanical impedance can thereby be measured as the drop of multi-component liquid dries. The particular geometry of an amplitude curve includes identifying the spatio-temporal development and phase transitions is used for integral estimation of food authenticity and quality.