| 摘要 |
PROBLEM TO BE SOLVED: To provide an electrophoretic chip whose detecting sensitivity can be enhanced by securing a long optical path length. SOLUTION: This electrophoretic chip has reservoirs 7 to 10 filled with an electrolytic solution, and a sample is injected into the liquid reservoir 8 by a microsyringe from a throughhole in a plate-shaped member, to impart a potential difference between the liquid reservoirs, 9 to introduce the sample into a migration groove 3. Next, a potential difference is imparted between the liquid reservoirs 7, 10 to cause migration of the sample inside an enlarging groove 4. Light emitted from a light source impinges on the enlarging groove 4, via a reflecting film on a light incidence groove 5. If the sample in the enlarging groove 4 has ultraviolet and visible absorption, the light is attenuated in proportion to the sample concentration and enters a light emission groove 5'. The light entering the light emission groove 5' is reflected by a reflecting film 6' and enters a detector. |
