Method for quality control of packaged organic substances and packaging material for use with this method
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United States of America Patent
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Apr 18, 1995
Issued Date -
N/A
app pub date -
Jun 29, 1993
filing date -
Mar 27, 1990
priority date (Note) -
Expired
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Abstract
For quality control of packaged organic substances, preferably packaged foods and drugs, the materials to be examined are brought into contact with a planar optical sensor element which is applied on the inside of the wrapping and responds to a change in the gas composition in the gas space above the sample by a change in color or fluorescence. The change of one of the optical properties of the sensor element is detected visually or opto-electronically.
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