Abstract: The invention relates to an analysis array comprising heatable electrodes and methods for chemical and biochemical analysis. According to the invention, the surface (1) of at least one heatable electrode (13) is brought to a specific homogeneous temperature for chemical and biochemical analysis. The cross-sectional area of the electrode (1) varies along the longitudinal axis (8), and/or at least the heating current contacts (5, 5?) are insulated by means of a coating (4, 4?). According to the methods for simultaneously determining at least one chemical and/or biochemical substance, the individual electrodes are brought to a specific homogeneous temperature, respectively, the temperature being regulated by measuring the resistance and adjusting the heating current.