Raman Chemical Imaging Technology for Food and Agricultural Applications
2017
Qin, J., Beltsville Agricultural Research Center, Beltsville, USA | Kim, M.S., Beltsville Agricultural Research Center, Beltsville, USA | Chao, K., Beltsville Agricultural Research Center, Beltsville, USA | Cho, B.K., Chungnam National University, Daejeon, Republic of Korea
Purpose: This paper presents Raman chemical imaging technology for inspecting food and agricultural products. Methods The paper puts emphasis on introducing and demonstrating Raman imaging techniques for practical uses in food analysis. Results and Conclusions: The main topics include Raman scattering principles, Raman spectroscopy measurement techniques (e.g., backscattering Raman spectroscopy, transmission Raman spectroscopy, and spatially offset Raman spectroscopy), Raman image acquisition methods (i.e., point-scan, line-scan, and area-scan methods), Raman imaging instruments (e.g., excitation sources, wavelength separation devices, detectors, imaging systems, and calibration methods), and Raman image processing and analysis techniques (e.g., fluorescence correction, mixture analysis, target identification, spatial mapping, and quantitative analysis). Raman chemical imaging applications for food safety and quality evaluation are also reviewed.
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