Patent ID: 7540949

Claim:
A capillary array electrophoresis apparatus comprising: a plurality of capillaries, each of which includes a first terminal portion and a second terminal portion; a first buffer vessel containing first buffer liquid into which the first terminal portions of the plurality of capillaries are immersed; a flow passage of which one end is connected to the second terminal portions of the plurality of capillaries; a second buffer vessel containing second buffer liquid to which the other end of the flow passage is contacted; a power source which applies a voltage to the first buffer liquid and the second buffer liquid; an excitation light system which irradiates excitation light to the capillaries; and a light receiving optical system which detects fluorescence; wherein, a liquid level of the first buffer liquid and that of the second buffer liquid are substantially the same, and wherein the second terminal portions are located at a higher position than the liquid level of the first buffer liquid and that of the second buffer liquid.