Analytical method and apparatus
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United States of America Patent
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N/A
Issued Date -
Feb 28, 2002
app pub date -
Mar 7, 2001
filing date -
Jul 31, 1996
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Method and apparatus for detecting and/or determining ethanol in fluid samples using a substantially non-porous barrier of un-plasticized polyvinyl chloride (PVC) interposed between the sample to be analyzed and a detecting means responsive to ethanol. The ethanol diffuses through the barrier membrane and then is measured at the detecting means. The PVC membrane can be made by solvent casting, and is usually 10 to 40 um thick. Measurement can be by any known means, but preferably electrochemically (amperometrically). The PVC membrane may be part of a multiple membrane system. The method and sensor are useful for analyzing alcoholic liquors or beverages (for example beer, wine and other fermentation products), in their final form or at intermediate stages of their manufacture or storage, and also for the monitoring of a wide range of process, waste and effluent liquids.
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