The GASPOROX technology is based on optical spectroscopy using low-power diode lasers. The gas is sensed by sending laser light through the sample, probing the gas content without any change of the sample. The gas can for example be located in a headspace of a package, inside porous materials or in gas cavities inside the human body.
Each molecule absorbs light in a unique way, allowing detection of them using laser absorption spectroscopy. GASPOROX utilizes low-power diode lasers in the near infrared to measure species such as gaseous oxygen, carbon dioxide and water vapour. The technique is a widely used laser spectroscopic technique called TDLAS, Tunable Diode Laser Absorption Spectroscopy, where the wavelength of the laser is tuned across one of the absorption lines of a gas, while the change in intensity of the light emerging after some distance of travel through the gas is monitored. The gas concentration can then be extracted from this information.
GASPOROX uses a unique version of the TDLAS technology allowing sensing of gas embedded inside various materials. This special TDLAS technology was invented in 2001, and is referred to as GASMAS, GAs in Scattering Media Absorption Spectroscopy, and was developed by researchers at Lund University. The GASMAS technology is unique in that the method applies TDLAS for determination of gases inside pores and cavities surrounded by light-scattering media.
GASPOROX are experts in the TDLAS technology in the focus areas food, packaging, material analysis and medical diagnostics. The samples can range from transparent containers to samples that only allow a minor fraction of the light to pass.
GASPOROX technology can measure the concentration of gas inside package headspace.
The packages can be for example trays, bottles, bags, and be made of materials such as plastic, foil, carton and paper.
The free gas seated inside food products can be measured with GASPOROX laser technology. The gas can be located in pores inside for example bread, fruits or meat. The measurement can be used to study ripeness, respiration and gas content.
By sensing the gas inside porous samples, materials parameters can be obtained using GASPOROX laser technology. Examples of possible obtained parameters are porosity, dampness and gas diffusion.
ith GASPOROX laser technology it is possible to measure the gas located inside the human body. This can be used for medical diagnosis of sinusitis, otitis and for monitoring lung function of premature born babies.
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GASMAS Scientific Publications
(Updated May 2014)