Chemistry: electrical and wave energy – Processes and products – Electrostatic field or electrical discharge
Patent
1993-06-15
1994-07-12
Niebling, John
Chemistry: electrical and wave energy
Processes and products
Electrostatic field or electrical discharge
204299R, G01N 2726, G01N 27447
Patent
active
053285786
ABSTRACT:
A capillary electrophoresis system utilizes a square "ring" capillary. The capillary has a hair-pin bend at each corner of the square. An opening in each bend permits fluid and electrical coupling with a respective electrolyte-containing vial. A distributor selectively routes the opposite terminals of a power supply to opposing corners of the square so that a sample component of interest migrates continuously downstream. A detector determines when the sample component traverses a detection point along the capillary. This detection is used to determine a migration rate for the sample component. When the sample component is estimated to be midway between corners, the distributor switches from applying a voltage differential between a second upstream corner and the downstream corner to applying a voltage differential between the upstream corner and the second downstream corner. This permits the sample component to migrate downstream past the downstream corner. The sample repeatedly traverses the ring until a reading from the detector determines that satisfactory resolution has been achieved.
REFERENCES:
patent: 4908112 (1990-03-01), Pace
Hewlett--Packard Company
Niebling John
Starsiak Jr. John S.
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