Chemistry: analytical and immunological testing – Measurement includes change in volume or pressure
Patent
1992-01-24
1994-11-29
Johnston, Jill A.
Chemistry: analytical and immunological testing
Measurement includes change in volume or pressure
73 2403, 73 2406, 7386322, 7386324, 422 73, 422 83, G01N 1500
Patent
active
053690338
ABSTRACT:
A system for monitoring changes in the amount of contaminants present in a flowing stream of supercritical fluid. A sample stream is removed from a flowing stream of supercritical fluid and subjected to reduced pressure. The supercritical fluid turns into gas at the reduced pressure with the contaminants remaining in a non-gaseous form. A quartz crystal microbalance system measures changes in the amount of non-gaseous contaminants present in the sample stream. The system is useful in monitoring both cleaning processes and extraction processes utilizing supercritical fluids.
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Di Milia Edward S.
Gleichauf Darrell A.
Whiting Thomas E.
Denson-Low W. K.
Hughes Aircraft Company
Johnston Jill A.
Lachman M. E.
Sales M. W.
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