The absorption bands at 995 and 1047 cm1 are associated with the ordered structure of starch.
The absorption band at 1022 cm1 is associated with the amorphous structure. Given the sensitivity of the changes of starch conformation,the ratios of the bands (1047/1022 and 995/1022 cm1) could be used to quantify the degrees of order in the starch samples.A higher ratio indicates a higher proportion of crystalline region in the starch granules.