17 May 2016 Line-scan spatially offset Raman spectroscopy for inspecting subsurface food safety and quality
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This paper presented a method for subsurface food inspection using a newly developed line-scan spatially offset Raman spectroscopy (SORS) technique. A 785 nm laser was used as a Raman excitation source. The line-shape SORS data was collected in a wavenumber range of 0–2815 cm-1 using a detection module consisting of an imaging spectrograph and a CCD camera. A layered sample, which was created by placing a plastic sheet cut from the original container on top of cane sugar, was used to test the capability for subsurface food inspection. A whole set of SORS data was acquired in an offset range of 0–36 mm (two sides of the laser) with a spatial interval of 0.07 mm. Raman spectrum from the cane sugar under the plastic sheet was resolved using self-modeling mixture analysis algorithms, demonstrating the potential of the technique for authenticating foods and ingredients through packaging. The line-scan SORS measurement technique provides a new method for subsurface inspection of food safety and quality.
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Jianwei Qin, Jianwei Qin, Kuanglin Chao, Kuanglin Chao, Moon S. Kim, Moon S. Kim, "Line-scan spatially offset Raman spectroscopy for inspecting subsurface food safety and quality", Proc. SPIE 9864, Sensing for Agriculture and Food Quality and Safety VIII, 98640C (17 May 2016); doi: 10.1117/12.2223746; https://doi.org/10.1117/12.2223746

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