摘要
以普通玉米淀粉为原料,采用稀碱分散法制备玉米直链淀粉。以直链淀粉的得率和蓝值为评价指标,通过正交试验确定最佳分离工艺为NaOH溶液浓度0.35～0.45mol/L、NaCl溶液质量分数5%、离心力5439～7014×g。该法制备的玉米直链淀粉与丁醇法和乙醇分散法制备的直链淀粉以及直链淀粉标准品的特性进行对比,根据其蓝值、特性黏度及特性分子质量、质构特性、相对分子质量分布结果可知,稀碱分散法制备直链淀粉的纯度高于乙醇分散法和丁醇法,并且直链淀粉的凝胶特性和相对分子质量分布情况接近直链淀粉标准品。
Corn starch was used as the raw material to prepare corn amylose by diluted alkaline dispersion method.The optimum conditions for preparing and separating corn amylose for improved amylose yield and blue value were determined by orthogonal array design to be NaOH concentration of 0.35-0.45 mol/L,NaCl concentration of 5% and centrifugation speed of 7000-8000 r/min.In addition,according to comparison on blue value,intrinsic viscosity and molecular weight,texture properties and molecular weight distribution,diluted alkaline dispersion derived corn amylose was more pure than n-butyl alcohol derived corn amylose and corn amylose obtained by ethanol method.The gelatinization properties and molecular weight distribution of diluted alkaline dispersion derived corn amylose were found to be as similar as those of the amylose standard.
出处
《食品科学》
EI
CAS
CSCD
北大核心
2011年第6期89-94,共6页
Food Science
基金
黑龙江省"十一五"重大攻关项目(GA06B401-4)
