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Purpose. To establish if FT-Raman Spectroscopy can be used to quantitate the degree of crystallinity in a model compound. Methods. Mixtures containing different proportions of amorphous and crystalline indomethacin were prepared. Using the peak intensity ratio 1698 cm−1 (crystalline) to 1680 cm−1 (amorphous), a correlation curve was prepared. This correlation curve was validated by testing further...
Purpose. (1) To characterise the different phases of trehalose using FT-Raman spectroscopy. (2) To monitor the changes in the structure of trehalose dihydrate on isothermal heating at 80°C. Methods. Different phases of trehalose were prepared and FT-Raman spectra obtained. Trehalose dihydrate was sieved to <45 μm and >425 μm particle size fractions and FT-Raman spectra were obtained at...
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