Dionex Corporation

Michael William Recknor

David A Wolze

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).

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Oakland, CA, United States of America

Michael William Recknor