Measuring and testing – Gas content of a liquid or a solid – Particular separator
Patent
1989-12-01
1991-09-24
Noland, Tom
Measuring and testing
Gas content of a liquid or a solid
Particular separator
7386485, G01N 3318, G01N 3324
Patent
active
050504258
ABSTRACT:
The disclosure is directed to an apparatus and method for measuring the presence of a volatile constituent of a sample of ground water or soil mixed with water. In an embodiment of the apparatus, a valve system is provided, and has a plurality of branches. A reclosable and collapsible bag, preferably of the polyethylene freezer bag type, is provided for receiving the sample. The bag has a hole in a wall thereof, preferably near the top of the bag. A gasketed fitting is provided for air-tight coupling a first of the branches of the valve system to the bag via the hole. A detector of the volatile constituent is coupleable to a second of the branches of the valve system. The valve system is operative, in one position thereof, to close off the first branch so as to isolate the bag, and in another position thereof, to couple the first and second branches so that the detector can communicate with the bag. In a disclosed embodiment, the valve system has a third branch coupled to ambient air, and the valve system is operative in said "one" position thereof to couple the second and third branches and close off the first branch, and is operative in said "another" position thereof to couple the first and second branches and close off the third branch.
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Noland Tom
Novack Martin
University of Connecticut
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