Electrochemical detector and method for producing same

An electrochemical detector for detecting a substance in a liquid by generating a redox cycle, the electrochemical detector comprising:

• a first working electrode having a first electrode surface;
• a second working electrode having a second electrode surface;
• and
• a plurality of insulating spacers, wherein
• the first and second electrode surfaces are placed so as to face each other so that an electric field is formed between the first and second electrode surfaces,
• the plurality of spacers are placed along the first and second electrode surfaces so as to separate the first and second electrode surfaces from each other,
• each of the spacers is particulate,
• the electrochemical detector comprises a plurality of detection units which are placed along a direction parallel to the electric field, and
• each of the detection units comprises the first working electrode, the second working electrode, and the plurality of spacers.

A method for producing an electrochemical detector, comprising:

• a step of placing a plurality of spacers on a first working electrode having a first electrode surface;
• and
• a step of placing a second working electrode having a second electrode surface so as to face the first electrode surface so that an electric field is formed between the first and second electrode surfaces, wherein
• each of the spacers is particulate,
• the step of placing the plurality of spacers and the step of placing the second working electrode are performed a plurality of times so that a plurality of detection units are placed along a direction parallel to the electric field, and
• each of the detection units has the first working electrode, the second working electrode, and the plurality of spacers.