Patent ID: 7223326

Claim:
A capillary electrophoresis system comprising: a lane, at least a part of which includes at least one capillary for separating fluorescent-labeled samples by electrophoresis by applying a voltage across a sample injection end and a sample elution end of the capillary; an irradiation unit for irradiating a laser beam to the capillary; a detection unit for detecting fluorescence emitted from the samples that are electrophoretically separated, wherein the capillary satisfies a relation: T−E 1 >L 1 , where T is a height for a highest position of the capillary in a vertical direction from a reference horizontal plane, E 1 is a height for the sample injection end of the capillary in the vertical direction from the reference horizontal plane, and L 1 is a length of a section of the capillary between the sample injection end and a fluorescence detection position at which the laser beam is irradiated, the capillary is filled with a polymer solution during the electrophoresis, and one end of the lane and another end of the lane are immersed in a first buffer and a second buffer, respectively, a height of a liquid level of the first buffer is substantially identical with a height of a liquid level of the second buffer during the electrophoresis.