Influence of surface effects on the characteristic curves of detergent sensors

The dynamic investigation of detergent properties during a washing process requires a sensitive measuring procedure, e.g. impedance spectroscopy. High selectivity and reproducibility are necessary to understand these properties. To keep down cross-sensitivity and interference, high requirements are demanded from the sensor element. The aims are to develop a sensor element which fulfills these requirements and to investigate the side-effects. Unavoidable cross-sensitivities and interferences will be described and eliminated as errors of measurement.