GPC Analysis of Rice Starches and Their Components from Different Rice Species

Abstract

Abstract: Native starch,amylose andamylopec tinfromindica rice,japonica rice a ndglutinous rice were analyzed by gel permeation chromatography,respecticely.Results indicated th at native rice starch has 2～3main com-ponents as amylose,intermediate an d amylopectin.The pure rice amylose and amylpprctins were obtained by n -butanol recrystallization method.The molecular weight distribution o f amylopectins was broader than that of amylose.The molecular weight distr bution of amylopectin showed no sign ificant difference among three rice species,but the molecular weight di stribution of japonica rice amylose was wider than that of indicate rice a my-lose.The equations for average mole cular weight and elution volume of am ylose and amylopectin were estimate d,respectively.

Key words: rice starch, amylose, amylopectin, gel permeation chromatography

LIU Qiao-Yu, ZHAO Si-Ming, XIONG Shan-Bai, ZHANG Sheng-Hua. GPC Analysis of Rice Starches and Their Components from Different Rice Species[J]. FOOD SCIENCE, 2003, 24(3): 105-108.

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GPC Analysis of Rice Starches and Their Components from Different Rice Species

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