In general , it's easily to elucidate the functional group in carbohydrate like ( OH) broad and strong band stretching at about 3380-3210 cm-1 . also you have a (C-O) sharp band at stretching frequency at about 1120-1280 cm-1.
The IR spectra of carbohydrates is lot more complex than suggested above. See for example, the IR of sucrose, maltose or other carbohydrates in the free database of SDBS. http://sdbs.db.aist.go.jp/sdbs/cgi-bin/cre_index.cgi?lang=eng
Guo Q., Ai L., Cui S.W. (2018) Fourier Transform Infrared Spectroscopy (FTIR) for Carbohydrate Analysis. In: Methodology for Structural Analysis of Polysaccharides. SpringerBriefs in Molecular Science. Springer, Cham. https://doi.org/10.1007/978-3-319-96370-9_9