Abstract: An electrochemical method of determining the presence and optionally the concentration of at least two analytes in a test sample which contains a mixture of analytes, wherein the analytes differ from one another in electrical charge and/or size, comprising the steps of: applying variable voltage, fixed voltage, current or impedance across an array of working electrodes consisting of electrodes coated with films of varying thickness and optionally a bare electrode, when the array is in contact with the test sample; measuring the current flowing or the impedance between each of the film-coated working electrodes and a counter electrode, or the potential between each of the film-coated working electrodes and a reference electrode, to obtain a raw data set consisting of a plurality of electrochemical signals; preprocessing the raw data set; and applying chemometric method (s) to the processed data, to qualitatively or quantitively characterize the at least two analytes of interest; wherein the working electrodes

Abstract: An electrochemical sensor comprising a counter electrode, optionally a reference electrode, and an array of multiple working electrodes, wherein at least one of the working electrodes is a film-coated electrode, and wherein the film-forming material has repeat unit that comprises six-membered non-aromatic ring. A device for electrochemical detection that comprises the sensor (an electrochemical tongue) and a method for detecting analytes with the aid of the sensor are also disclosed.