Retrogradation kinetics of waxy-corn and potato starches; a rapid, Raman-spectroscopic study

The retrogradation kinetics for waxy-corn starch-water and potato starchwater systems were monitored by rapid-scanning, Raman spectroscopy. The spectra showed that bands in the 480-cm−1 skeletal-mode region and the 2900-cm−1 C-H stretching-mode region are sensitive to the retrogradation process. Kinetic data obtained from the time dependence of these modes show a multi-stage process. This process is discussed in terms of the formation of local and long-range order in the starch polymers.