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Study on gelatinization properties of sweet potato starch phosphoric ester

Hui Ning Xu

Abstract

Sweet potato starch phosphoric ester was prepared with sweet potato starch as raw material and sodium trimetaphosphate.The gelatinization properties of starch phosphoric ester was studied in detail by polarizing microscopy,spectrophotometer and circumvolution viscosity analyzer and so on.The results indicated that sweet potato starch phosphoric ester showed higher pasting temperature,stability of hot and cold viscosity,stability of freeze-thaw and higher salt tolerance,while the transparency,settlement,and retrogradation of modifed starch showed similar to that of raw starch,and the degree substitution has a significant effect on the properties.

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Key concepts: Starch, Potato starch, Chemistry, Retrogradation (starch), Food science, Raw material, Viscosity, Starch gelatinization