| 摘要 |
A particle agglutination reaction is detected with the aid of a reaction vessel of flow cell type having an inlet, an outlet and an inclined passage communicating the inlet and outlet to each other. A test liquid containing particles is supplied into the passage via the inlet and is retained stationary therein for a given time period. Particles descending upon an inclined bottom surface of the passage form at first a stable base layer due to regular steps formed in the bottom surface. When a particle agglutination reaction has occurred, a uniformly deposited particle pattern is formed on the inclined bottom surface, while in case of non-agglutination reaction, the particles descending upon the inclined bottom surface roll down along the base layer and are collected at the lowermost portion of the passage. By detecting the particle pattern formed on the inclined bottom surface, it is possible to detect the agglutination reaction accurately.
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