Sensor Determines If Packaged Meat Has Spoiled
Date: 18.4.2011
When it comes to packaged fish or meat, it is nearly impossible to distinguish between fresh goods and their inedible counterparts. Researchers have now developed a sensor film that can be integrated into the package itself, where it takes over the role of quality control. And if the food has spoiled, it changes color to announce the fact.
The sensor film is integrated into the inside of the packaging, where it responds to biogenic amines. Amines are molecules produced when foods -- fish and meat foremost among them -- decay. They are also responsible for their unpleasant smell. If amines are released into the air within the packaging, the indicator dye on the sensor film reacts with them and changes its color from yellow to blue.
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