2014•Science and Technology of Food IndustryRequires access
Ultrasonics-alkali extraction technology of soluble dietary fiber from corn cob by response surface method
Zhang Xiao-lon
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Abstract
Alkalilye(NaOH) as an extraction agent,the soluble dietary fiber was extraceted from corn cob by ultrasonics. Based on the single experiment,the best condition of soluble dietary fiber extraction was optimized by Box-Behnken central composite design and surface analysis. At last,results showed that liquid ratio of corn cob soluble dietary fiber had the greatest impact on the extraction of soluble dietary fiber,followed by alkali concentraion,and ultrasonic temperature and ultrasonic time less affected. The optimum extraction conditions were alkalinity 0.88%,liquid-solid ratio 37∶1(mL/g),extraction temeperature 41℃,and extraction time 20.30 min.Under this condition,the theory value of the extraction rate of the soluble dietary fiber was 23.11%,but the actual operation of the experiment turned out to be 23.21%.