Flow path plate, analysis apparatus, and analysis method

An analysis method for analysis of a component in a liquid sample by using a flow path plate that includes

• a plate body having a plate shape and having transparency,
• a flow path formed within the plate body and through which the liquid sample passes,
• a chamber provided in a part of the flow path and formed by a space having a cross-sectional area greater than cross-sectional areas of other parts of the flow path, and
• an internal part for detection disposed in the chamber and having a through hole, the through hole having an inner wall surface and through which the liquid sample and measurement light pass,
• wherein the internal part is configured to inhibit transmission of the measurement light from the inner wall surface of the through hole to outside, the method comprising:
• emitting the measurement light into the through hole of the internal part;
• and
• analyzing the measurement light that has passed through the liquid sample flowing through the through hole of the internal part.