Pressure injection apparatus and method for injecting a sample i

Details Pressure injection apparatus and method for injecting a sample i Pressure injection apparatus and method for injecting a sample i

1995-09-28

1997-09-16

Gorgos, Kathryn L.

Chemistry: electrical and wave energy

Apparatus

Electrophoretic or electro-osmotic apparatus

204453, G01N 2726, G01N 27447

Patent

active

056676573

ABSTRACT:
A present invention and method provides a pressure injection apparatus (20) that injects a quantitatively defined volume of liquid sample (21) from a container (22) into a capillary device (23). A servo pressure primary regulator (26) is included which precisely regulates the fluid from a supply pressure (P.sub.S) to a substantially constant regulated pressure (P.sub.R) in communication with the liquid sample (21) for a predetermined period of time. A feedback mechanism cooperates with a valving assembly (31) to continuously monitor and adjust the regulated pressure (P.sub.R) to be substantially constant and precise for delivery to the container (21).

REFERENCES:
patent: 5207886 (1993-05-01), Lauer et al.
patent: 5217590 (1993-06-01), Lauer et al.
patent: 5240578 (1993-08-01), Tatsumi
patent: 5358613 (1994-10-01), Schneider et al.
Lauer, H.H., et al., "Prince: A Variable Pressure Injection Device for Modular CE-Systems." Lauer Labs BV, Kapitein Nemostraat 16A, 7821 AC Emmen, Netherlamds. no date available.

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