Gas-liquid equilibration apparatus
AssigneeAnalytical Products, Inc.
InventorRonald B. Smernoff
Life of this patent
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Abstract
Standards solutions and test samples are necessary for blood gas analyzers. Production of such standards and test samples has only been possible with relatively expensive apparatus. Such standards and test samples are provided herein by apparatus 10 which equilibrates a liquid 12 with a gas 14. The apparatus 10 includes a barrel 16 open at a first end 18 and at a second end 20. A piston 22 fits matingly reciprocally within the barrel 16. A flow control 26 allows the gas 14 to flow into the second end 20 of the barrel 16 and prevents the liquid 12 from flowing out of the second end 20 of the barrel 16. The gas 14 is allowed to flow out of the barrel 16 above a liquid level 44 therein. A method utilizing the apparatus 10 to prepare standard and test sample solutions is also set out.
Claims8
Apparatus for equilibrating a liquid sample with gas, comprising:
- a barrel open at a first and at a second end thereof;
- a piston in mating slidable relation within said barrel;
- a membrane affixed in said barrel adjacent said second end thereof, said membrane being substantially impervious to flow of said liquid sample when under the influence of normal gravity and being pervious to flow of said gas;
- and
- means for allowing gas to flow out of said barrel above a liquid level therein.
Dependencies are inferred from the claim text.