Detection Methods for Resistance Starch Content of Yi-Tang Rice and Optimization of Pretreatment

Abstract:

A quick and accurate determination of resistant starch （RS） content in rice was studied，and the optimization of pretreatment was investigated on Yi-Tang rice. The comparative study between AOAC method and Goni method was carried out first and an improved Goni method was then established. The standard RS was selected to analyze the RS content detection using AOAC method and the improved Goni method，respectively. The optimal method was thus used to determine the RS content in Yi-Tang Rice. AOAC method was recommended to detect RS content offering simplicity，accuracy and stability. The RS content of Yi-Tang rice could be significantly improved by cooking and steaming. Higher RS content after cooled was achieved under higher hydrolysis degree and gelatinization of starch when more water was added and finer particles were provided.