The absorbance bands at 1047 and 1022 cm1 are sensitive to
ordered structure and amorphous structure in starch, respectively.
Hence, the ratio of absorbances at 1047/1022 cm1 can be used to
characterize the short-range molecular order of double helices
(Capron, Robert, Colonna, Brogly, & Planchot, 2007; Van Soest et al.,
1995). As shown in Table 1, the ratios of absorbances at 1047/
1022 cm1 followed the order: ED > OD > FD, consistent with the
results of XRD. This indicated that the short-range molecular order
of double helices in ED starch was highest, followed by OD starch,
FD starch presented the lowest value. In a previous study, no