CELL MEASURING VESSEL, EXTRACELLULAR POTENTIAL MEASURING METHOD, AND CHEMICAL TESTING METHOD

摘要

Cell observation using a conventional well plate requires a high testing cost. Each well (3) opened in a top plate part (2a) of a well plate (1) includes a reduced-diameter part (32) with a conical inner surface (32a). An insertion hole (33) is formed in a lower end portion of the reduced-diameter part (32). A detector (4) includes a round bar-shaped reference electrode (41) whose outer surface is covered with an insulating part (42). The reference electrode (41) has an upper end portion (4a) and a lower end portion (4b) which are exposed to the outside without being covered with the insulating part (42). An enlarged-diameter part (4c) formed by covering the outer surface of the insulating part (42) with a measuring electrode (43) is provided further towards the upper end side than the lower end portion (4b). The detector (4) is fixed to the well (3), and the enlarged-diameter part (4c) is inserted into the insertion hole (33) with the upper end portion (4a) housed in the well (3). In the detector (4), an upper end surface (43a) of the measuring electrode (43) is continuous with the inner surface (32a) of the reduced-diameter part (32) located at the rim of the insertion hole (33).