Sensor and concentration measurement method
View Patent ↗A reagent layer of a sensor contains as a mediator a quinone compound having a hydrophilic functional group, phenanthrenequinone, and/or a phenanthrenequinone derivative. The quinone compound has a lower redox potential than a conventional mediator, so interfering substances have less effect on detection results with this sensor.
1. A sensor for detecting or quantifying a target substance contained in a liquid sample, comprising:
a phenanthrenequinone and a phenanthrenequinone derivative as a mediator;
an enzyme dehydrogenating or oxidizing the target substance; and
at least a pair of electrodes;
wherein the amount of the phenanthrenequinone and the phenanthrenequinone derivative contained in the sensor is 0.05 to 2500 nmol per unit of the enzyme.
2. The sensor according to claim 1 ,
wherein the amount of the phenanthrenequinone and the phenanthrenequinone derivative contained in the sensor is 1 to 400 nmol per unit of the enzyme.