Chemistry: physical processes – Physical processes – Crystallization
Patent
1977-12-23
1980-09-09
Michell, Robert W.
Chemistry: physical processes
Physical processes
Crystallization
23928, 128635, 422 68, G01N 3316
Patent
active
042215676
ABSTRACT:
Method and system for sampling and determining chemical substances such as blood gases, in a fluid matrix, such as blood, by bringing the chemical substances into equilibrium with a liquid in a fiber probe, passing the equilibrated liquid to a sensor adjacent the equilibrium region and on into a hollow fiber line enclosed in a calibration chamber. Calibration of the sensors is accomplished by reversing the flow of liquid from the hollow fiber line to the sensors. In the system chemical substances for sensor calibration are provided by an electric proportioner whose output is continuously controlled by the output of the sensors such that the substances proportioned into a fluid in the calibration chamber surrounding the hollow fiber line are substantially the same as the substances within the matrix. The concentration of substances is determined by the output of the sensors and the amount of substances fed from the proportioner to the fluid surrounding the hollow fiber line. When the substances being measured are in equilibrium with both the matrix and fluid surrounding the hollow fiber line, a null response is obtained at the sensors.
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Clark Justin S.
Farr Frederick L.
Wallace William D.
Intermountain Health Care
Jaworski Francis J.
Michell Robert W.
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