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Laser Checks Food for Freshness

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LUND, Sweden, Oct. 21, 2011 — Most packaged food products are protected from oxidation by a gas such as carbon dioxide or nitrogen. Currently there is no method that can check whether the packaging has the correct gas content, but a new handheld laser instrument that can detect oxygen levels in a nondestructive fashion could solve that problem. “It will be the first nondestructive method. This means that measurements can be taken in closed packaging, and the gas composition over time can be checked. This will make it possible to check a much higher number of products than at present,” said Märta...Read full article

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    Published: October 2011
    Glossary
    laser detector
    Device that operates by interaction of incident radiation with semiconductor based material in order to produce an electrical signal or by other means, to interact with calorimetric devices which produce a thermally induced current. The response of the detection devices will vary by the source wavelength, intensity and energy.
    airtight packagingBasic ScienceBiophotonicscarbon dioxideEuropeGasporoxlaser detectorLund UniversityMärta Lewandernitrogenoxidizationpackaged foodPatrik LundinResearch & TechnologySensors & DetectorssinusitisSwedenLasers

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