Abstract: It is an object of the present invention to further stabilize the efficiency of isolating nucleic acid concerning an apparatus for isolating nucleic acid. The present invention relates to an apparatus for isolating nucleic acid, the apparatus being provided with a meshed solid substance for binding nucleic acid. By employing the meshed solid substance for binding nucleic acid, fluid resistance can be reduced upon allowing a sample that includes nucleic acid to pass the solid substance for binding nucleic acid, while securing solid-phase volume that is sufficient for binding a large amount of nucleic acid. Consequently, even when the sample is allowed to pass the solid substance for binding nucleic acid at a high aspiration/dispense speed, force added to the solid substance for binding nucleic acid is small and the solid substance for binding nucleic acid is almost undistorted.

Abstract: An electrophoresis device capable of supplying a sample accurately without positioning error using a rotary autosampler. A projection (17) is mounted on the lower surface of a detachable carousel (13) on a rotation axis thereof. A projection bearing (18) is mounted on a rotation axis of a turntable (15). The respective central axes are automatically aligned so that no eccentricity is caused by rotation. A pressing means is provided in a heater unit at a position corresponding to the position of the capillary, thereby reducing irregularities in the heating of the capillary. A sample-loaded end of the capillary is passed through a tubular electrode and adapted to operate with the electrode in an integral manner.