Electrophoretic mobility measurement cell, and measurement device and measurement method using the same

摘要

An electrophoretic mobility measurement cell having: a container having a rectangular parallelepiped inner space (11) for introducing a sample solution; two electrodes (14) for applying an electric field to the inner space (11), the two electrodes being formed inside the container in integral fashion with the container; a tubular sample injection part (17) in communication with the inner space (11); a tubular sample extraction part (18) in communication with the inner space (11); a first cap (21) for covering the sample injection part (17) and sealing the inner space (11); and a second cap (22) for covering the sample extraction part (18) and sealing the inner space (11). The first cap (21) has a first side surface (21b) that makes contact with the inner surface (17a) of the tubular sample injection part (17) when the cap is mounted. The inner surface (17a) is formed so that the cross-sectional area of the tube increases in accordance with the distance from the inner space (11). The first side surface (21b) has a cross-sectional surface area that gradually narrows along the insertion direction of the first cap (21). The cell and electrode part are integrally formed, the electrode part is disposable together with the cell, and foam is unlikely to remain during injection of the sample solution.