| 摘要 |
The present invention provides a biosensor including a working electrode or working electrodes on which a reaction material or a bonding material is immobilized, where the reaction material is reactive with a target material so as to produce a product, and the bonding material is bondable with a target material; a counter electrode; and a reaction section for holding a sample liquid containing the target material, the working electrode and the counter electrode being provided on a bottom surface of the reaction section, and the working electrode occupying the bottom surface of the reaction section by a ratio of 0.7 or greater.
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