Analysis of starch amylolysis using plots for first-order kinetics

► Starch digestibility data can usually be fitted to a first-order rate equation. ► Guggenheim and/or log of slope (LOS) plots do not need end-point values. ► LOS plots provide end point concentrations (i.e., the maximum available starch) directly. ► If both are present, RDS and SDS fractions result in discontinuities in LOS plots. ► Examples of Guggenheim and LOS plots fits for starch are shown and merits discussed.