“LAPS Card”—A novel chip card-based light-addressable potentiometric sensor (LAPS)

A novel design of a light-addressable potentiometric sensor (LAPS) for the realisation of an easy exchangeable and modular measurement set-up is presented in this work. The sensor chip for up to 16 independent sensor spots is integrated in a standard plastic card and the appropriate measurement cell allows a selection of different chip cards within seconds. The measurement cell contains an integrated electronic to control the measurement procedure and to read out the measurement signal from the LAPS-chip card to provide a stable signal for further data acquisition. This guarantees a high flexibility due to the use of different chip cards with the same measurement device on the one hand, and a high statistical prediction, because of the repeatable measurements with different sensor-chip cards of the same series under exact the same environmental conditions, on the other hand. Both the design and first measurements with this “LAPS cards” will be presented.