Fourier-transform infrared microspectroscopy , solid

Fourier transform infrared microspectroscopy (FTIR) and Raman microspectroscopy provide quantitative information about the chemical microstructure of heterogeneous solid foods (Cremer and Kaletunq, 2003 Piot et al., 2000 Thygesen et al., 2003) without sample destruction. 

Raman microspectroscopy is the fastest and most powerful tool for analysis of phase transformations in contact loading. It can additionally provide information on residual stresses and/or chemical changes in the surface layers. However, limited databases of Raman spectra and difficulties with the interpretation of Raman spectra, as well as low accuracy of existing predictive tools for calculations of Raman spectra of solids, make it necessary to complement Raman data with electron or X-ray diffraction studies. Fourier-transform infrared microspectroscopy is another technique that can provide useful information on structural and compositional changes in the surface layer. 

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