3.3. Concluding remarks
The application of a PCA to the FT-IR spectra in the 1200–
800 cmK1 region of monosaccharides, disaccharides and
polysaccharides in dry, hydrated and in solution forms showed
that although hydration affects the spectra, the distinction of
sugars and polysaccharides by FT-IR in the 1200–800 cmK1
region can be achieved with no apparent loss of information.
When the samples are in aqueous solution, the water influence
is included in PC1 and the FT-IR spectral information of
carbohydrates, previously given in PC1 and PC2 in dried
samples, can be achieved in PC2 and PC3.