Chemistry: analytical and immunological testing – Including sample preparation
Patent
1976-06-17
1986-07-15
Marcus, Michael S.
Chemistry: analytical and immunological testing
Including sample preparation
55 68, 261 82, 422 50, 422 68, 422 81, 422 99, 422101, 422102, 422104, 436134, 436138, 436 11, 436 68, 436178, G01N 3350, G01N 100, B01L 1100
Patent
active
046006974
ABSTRACT:
The invention is concerned with apparatus for equilibrating an aqueous solution with gas. The apparatus includes a gas vessel having therewithin a gas of a selectable composition at a pressure above ambient atmospheric pressure. Flow control means receive flow from the vessel and control a flow rate therefrom. A solution tube is provided having an aqueous solution therewithin. Conduit means lead from the flow control means to the tube below a liquid level of the aqueous solution. Means are also provided for causing the gas to be delivered within the aqueous solution below the liquid level as a plurality of bubbles. The process of the present invention is directed at simultaneously equilibrating a plurality of aqueous solutions each with one of a plurality of gas compositions. The process comprises positioning a plurality of solutions tubes, each having an open end and a closed end, in mating fit within a respective one of a plurality of cavities formed within a heat conductive block with the open ends of the tubes upwardly and a respective one of a plurality of aqueous solutions in each of the tubes. The temperature of each of the solutions is adjusted to be substantially equal by controlling the temperature of the block to a desired value. A respective one of the plurality of gas compositions is delivered below a respective liquid level of a respective aqueous solution within each respective one of the tubes in the form of bubbles.
REFERENCES:
patent: 3127254 (1964-03-01), Astrup et al.
patent: 3973915 (1976-08-01), Raffaele et al.
Noonan et al., Clinical Chem., vol. 20, No. 6, 1974, pp. 660-665.
Analytical Products, Inc.
Marcus Michael S.
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