| 摘要 |
To detect bands in an electrophoresis capillary tube (30) having a liquid separating medium, a light source and a light detector of a monitor (70) are positioned on opposite sides of the capillary tube (30) with the light source transmitting light through a first slit (206) and light passing to the detector through a second slit (206a) after it has passed through the capillary tube (30). The first and second slits (206, 206a) are aligned with the direction of motion of bands, have a maximum length of less than 500 micrometers and a maximum width of less than 200 micrometers. There are no vertical lengths in the capillary tube (30) having a dimension greater than one third of its length between a sample injecting end and a detecting end of the capillary tube (30). A sample injector includes a vacuum chamber (95) communicating with one end of the capillary tube (30) to pull sample into the other end and a pressure sensor (104) to measure the pressure in said vacuum chamber (96) and generate a signal indicative thereof and integrate it to indicate the amount of sample pulled into the system.
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