photoempfindliche electrode for the determination of the redox potentiales.

摘要

Devices and methods are provided for determining the presence and amount of an analyte by measuring a redox potential-modulated photoinducing signal from a photoresponsive element and are provided for determining the presence and amount of an analyte by measuring a redox potential, pH or ion modulated photoinduced signal from a photoresponsive element (150), where one signal is a constant system (122) and the other signal(s) (120) is a variable system. The constant system signal is used to standardize the variable system signal e.g. via operational amplifier (110) and reference electrode (170). Various protocols may be employed where an analyte may be directly or indirectly coupled to a redox couple, a pH or ion system for detection. A photoresponsive element may have a medium-contacting surface which is partially covered with an electronically conducting layer (153) and partially covered with a protective insulative layer (152).