Air cooled cartridge for capillary electrophoresis

Details Air cooled cartridge for capillary electrophoresis Air cooled cartridge for capillary electrophoresis

1990-01-25

1991-08-06

Niebling, John F.

Chemistry: electrical and wave energy

Apparatus

Coating, forming or etching by sputtering

2041801, G01N 2726, B01D 5702

Patent

active

050375237

ABSTRACT:
An electrophoresis instrument includes a capillary tube mounted in an air cooled cartridge. The cartridge also supports a spherical lens which is part of the optical detection apparatus. The cartridge rests in a manifold which includes the sample and buffer reservoirs. The temperature of the capillary tube is controlled by measuring the electrical resistance of the capillary tube during the electrophoresis process and then cooling or heating the cartridge by circulating temperature controlled air over the tube. The optical path associated with the instrument is a fiber optic bundle bifurcated close to dual detectors into a reference arm and a sample arm so as to provide similar reference and sample optical paths. The instrument may be used for temperature control for gradient electrophoresis and also, a neutral marker for determining electro-osmotic flow may be detected.

REFERENCES:
Karger, B. L. et al., "High Performance Capillary Electrophoresis Using Open Tubes and Gels", Chromatographia, vol. 24 (1987), 15-24.
Nielsen, R. G. et al., "Capillary Zone Electrophoresis of Insulin and Growth Hormone", Analytical Biochemistry, vol. 177 (1989), 20-26.

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