Optimal Technical Parameters of Producing Wheat Resistant Starch

In this study,wheat starch was used for the purpose of investigating resistant starch preparation technologies,which included the autoclaving method and the acid hydrolysis method.Optimal technical parameters of producing wheat resistant starch in these two methods with single factor test,and orthogonal test.The results showed that the primary and secondary sequence of influence factors in resistant starch production with autoclaving method was autoclaving temperature,starch concentration,retrogradation time and autoclaving time respectively.The optimal parameters for wheat resistant starch production were that 30% starch concentration,pH value 6.0,120 ℃ heated temperature and last for 40 minutes,4 ℃ placement temperature and last for 24 hours,the average yield of wheat resistant starch was 7.26%.The primary and secondary sequence of influence factors in resistant starch production with acid hydrolysis method was that acid dosage,boil treatment time,starch concentration and acid hydrolysis time.The optimal parameters for wheat resistant starch production were that,2% acid dosage,15% starch concentration,2 hours acid hydrolysis time,2.5 hours boil treatment time,4 ℃ placement temperature and last for 24 hours,and the average yield of wheat resistant starch was 7.74%.