Food monitoring based on diode laser gas spectroscopy

Märta Lewander, Zuguang Guan, Linda Persson, Annika Olsson, Sune Svanberg

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Abstract

Abstract Food is frequently packed in a controlled environment
of gas, in order to extend shelf life. It is of great
importance to be able to monitor the status of the packed
food to ensure quality. We demonstrate a technique to monitor
the gas inside packages non-intrusively by using a laser
spectroscopicmethod in scattering solid materials. The technique
named GASMAS (GAs in Scattering Media Absorption
Spectroscopy) is based on tunable diode laser absorption
spectroscopy and relies on the fact that free gas inside
solid materials absorbs much sharper spectrally than
the bulk material. Results from time dependent measurements
of molecular oxygen and water vapour in packages
of minced meat, bake-off bread, and the headspace of a milk
carton are presented. We show that the technique allows gas
measurements inside the food through the package, and assessment
of the integrity of the package.
Original languageEnglish
Pages (from-to)619-625
JournalApplied Physics B
Volume93
DOIs
Publication statusPublished - 2008

Subject classification (UKÄ)

  • Atom and Molecular Physics and Optics
  • Other Mechanical Engineering

Free keywords

  • Laser spectroscopy
  • Food Packaging
  • Gas compositions
  • Logistics
  • Non-intrusive measurements
  • Packaging
  • Packaging logistics

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