Chemistry: analytical and immunological testing – Hydrocarbon
Patent
1997-01-17
1998-12-08
Wallenhorst, Maureen M.
Chemistry: analytical and immunological testing
Hydrocarbon
436167, 422 58, 422 86, 422 88, 62125, 62127, 62129, G01N 3300
Patent
active
058468331
ABSTRACT:
A method for testing a non-hydrocarbon refrigerant, such as CFC-12 or HFC-134a, in a closed system for hydrocarbons, HCFC-22 refrigerant and ammonia is provided wherein a sample of the non-hydrocarbon refrigerant is withdrawn from the closed system, the pressure of the sample is measured and a metered portion of the sample is passed through a test apparatus (20) including a testing tube (30), a testing tube holder (40) for supporting the testing tube (30) and outfitted with a vent (48) to the atmosphere, and a pressure gauge (70) for indicating the pressure of the sample withdrawn. A medium (38) for indicating the presence of hydrocarbons in the sample flow passing through the testing tube is deposited on a surface disposed in the testing tube. The presence of undesired HCFC-22 refrigerant in the CFC-12 or HFC-134a is indicated by a higher pressure reading on the pressure gauge (70). Finally, the presence of ammonia is sensed by its characteristic pungent odor as the refrigerant sample flow is vented to the atmosphere.
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Attanasio John
Clough Warren R.
Condit David A.
Faris William A.
Michels H. Harvey
Carrier Corporation
Habelt William W.
Wallenhorst Maureen M.
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