Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Patent
1994-06-21
1995-12-05
Hannaher, Constantine
Radiant energy
Invisible radiant energy responsive electric signalling
Infrared responsive
G01N 2100
Patent
active
054731615
ABSTRACT:
A method for measuring carbonation loss in beverage bottles and predicting shelf-life thereof utilizes infrared (IR) absorption spectroscopy. The concentration of CO.sub.2 gas in a bottle being tested is measured with an infrared beam according to Beer's Law. In one embodiment the CO.sub.2 gas measured is in the headspace of a test bottle partially filled with carbonated water. The walls of the bottle are clamped in a fixture to maintain the bottle diameter substantially constant. An IR beam is transmitted through the bottle just below the fixture, and absorption values of the beam are measured. Shelf-life is calculated from the absorption values. In another embodiment the test bottle is filled with compressed CO.sub.2 gas generated by dry ice placed in the bottle.
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Jolie Louis
Nix John A.
Zagarola Stephen W.
Hannaher Constantine
The Coca-Cola Company
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