Jawaid et al. and Sherman have suggested that the functional
group region is better for classification and prediction than the
fingerprint region, because most of the information used to
interpret the MIR spectrum is usually obtained from the
former, whereas the fingerprint region is normally complex with
many frequently overlapped bands.16,28 In our study, the
fingerprint region gave better results than the functional group
region with respect to the quantative prediction of starch
adulteration in the onion powder samples. Moreover, Filippov
also discribed the use of the fingerprint region of MIR for the
identification of carbohydrates.29 For more information readers
should refer to ref 29 and references cited therein.