Comprehensive Characterization of Starch from Diverse Sources: Physicochemical, and Functional Properties

Abstract

The present study is based on the comprehensive characterization of starches from pearl millet, sorghum, mango kernel, and water chestnut. The starches are analyzed to observe the difference in physicochemical, pasting, rheological, Fourier transform infrared spectroscopy (FTIR), and X‐ray diffraction (XRD) properties. The amylose content from diverse sources ranges from 17.3 to 26.3%. The swelling power and solubility of the starches are influenced by the increase in temperature. It is observed that an increase in temperature results in increased swelling power and solubility. At 90 °C, mango kernel starch shows the highest swelling power while pearl millet starch shows the lowest. The botanical sources influence the pasting and rheological properties, and a significant difference (p < 0.05) is observed in all the parameters recorded. The peak viscosity (PV) of starches ranges from 1256 to 2101 cP. All the starches possess almost similar and typical starch FTIR spectra. The starches from all sources show prominent peaks at 15.2, 17, 18.3, and 23 (2θ), corresponding to a typical A‐type starch crystallinity organization.