BIOSENSOR

摘要

Provided is a technique by which reduction of a mediator during storage can be suppressed. In a reagent layer (an enzyme layer (106b) and a mediator layer (106c)), which is separately laminated on a hydrophilic layer (106a) that contains a hydrophilic polymer having a double bond of oxygen atoms, contains an enzyme, a mediator and a hydrophilic polymer having no double bond of oxygen atoms. Consequently, the mediator is surrounded by the hydrophilic polymer having no double bond of oxygen atoms, and thus it becomes possible to prevent the mediator contained in the mediator layer (106c) from coming into contact with CMC, which is the hydrophilic polymer of the hydrophilic layer (106a), during storage. As a result, reduction of the mediator by the hydrophilic polymer having a double bond of oxygen atoms in the hydrophilic layer (106a) can be suppressed.