Capillary electrophoresis technique
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United States of America Patent
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Oct 11, 1994
Grant Date -
N/A
app pub date -
Nov 29, 1988
filing date -
Nov 29, 1988
priority date (Note) -
Expired
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Abstract
To detect bands in an electrophoresis capillary tube having a liquid separating medium, a light source and a light detector of a monitor are positioned on opposite sides of the capillary tube with the light source transmitting light through a first slit and light passing to the detector through a second slit after it has passed through the capillary tube. The first and second slits 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 having a dimension greater than one third of its length between a sample injecting end and a detecting end of the capillary tube. A sample injector includes a vacuum chamber communicating with one end of the capillary tube to pull sample into the other end and a pressure sensor to measure the pressure in said vacuum chamber and generate a signal indicative thereof and integrate it to indicate the amount of sample pulled into the system.
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