System for electrokinetic separation and detection where detecti

Details System for electrokinetic separation and detection where detecti System for electrokinetic separation and detection where detecti

1993-09-01

1994-08-30

Niebling, John

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

204299R, G01N 2726, G01N 27447

Patent

active

053424921

ABSTRACT:
A voltage alternating between a high value and a low value is applied across a separation capillary in an electrophoretic system and electrochemical detection is performed only during time periods when a low voltage or no voltage is applied to the tube to improve the sensitivity of detection.

REFERENCES:
patent: 4909919 (1990-03-01), Morris et al.
patent: 5015350 (1991-05-01), Wiktorowicz
patent: 5122248 (1992-06-01), Karger et al.
patent: 5126023 (1992-06-01), Huang et al.
patent: 5169510 (1992-12-01), Lunte et al.
Susan Lunte et al "Detection of Carbohydrates by Capillary Electrophoresis with Pulsed Amperometric Detection" Analytical Chemistry, vol. 65, No. 7 (Apr. 1, 1993) 948-951.
Wenzhe Lu and Richard M. Cassidy "Evaluation of Ultramicroelectrodes for the Detection of Metal Ions Separated by Capillary Electrophoresis" analytical Chemistry, vol. 65, No. 13 (Jul. 1, 1993) 1649-1653.
"Capillary Zone Electrophoresis with Electrochemical Detection," by Wallingford et al., Anal. Chem., 1987, 59, 1762-1766, no month available.
"End-Column Detection for Capillary Zone Electrophoresis," by Huang et al., Anal. Chem., Jan. 1991, 63, 189-192.
"Enhanced Separation of DNA Restriction Fragments by Capillary Gel Electophoresis Using Field Strength Gradients," by Guttman et al., Anal. Chem., Oct. 1992, 64, 2348-2351, Beckman Instruments Inc., Fullerton, Calif., 1992.

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