The Preparation Of Grape Seed Ultra-micro Powder And The Optimization Of Its Chip Candy Formulation Process

In grape seeds as raw material,by studying the solve the problem of grape seed in the superfinegrinding process agglomerate,the grape seed after dealing with the resistance to knot the grape seed superfine powder preparation,again with grape seed superfine flour tabletting candy,single factor experiment is used to determine the formula of the scope of application,with sensory evaluation of fuzzy mathematics combined with D-the optimal mixing design optimization formulation of grape seeds superfine powder tabletting candy,finally to its oxidation resistance and shelf life weredetermined,in order to develop export feeling good,grape seed of a certain functional superfine powder tabletting candy.The results are as follows:(1)By investigating the effects of degreasing time,crushing time and drying time on the agglomeration of grape seeds,the anti-caking process of grape seeds was optimized.The anti-caking process of grape seed powder was determined as follows:degreasing for 1 h,crushing for 3 min and drying for 3 h.Under this condition,the agglomeration amount of grape seed powder was 5.17 g,and the agglomeration rate decreased by 65.3%.The grape seed powder after anti-knotting treatment was ultra-finely crushed,and the changes in physical properties and nutritional components of the ultra-fine grape seed powder were determined.The fluidity and compressibility of the powder in the compression process were verified by the North Sichuan equation.The final obtained ultra-fine grape seed powder had a repose angle of 31.2°,a bulk density of 0.355 g/cm~3,a tap density of 0.420g/cm~3,a Carr's index of 15.47%,and a D50 of 3.014?m.After ultra-fine grinding,the protein and total phenol increased by about 26.7%,respectively.(2)The results of sensory evaluation based on fuzzy mathematics combined with D-optimal mixture design showed that the optimal formula of grape seed superfine powder pressed candy was:grape seed superfine powder addition:71.7%,microcrystalline cellulose addition:19%,pregelatinized starch addition:7%,stevioside addition:1.2%,citric acid addition:0.9%.According to the optimal formula,the pressed candy had no spots and cracks,the appearance surface was smooth,the taste was fine,no grain sense,good chewiness,moderate sour and sweet taste,and slight astringency.Through the determination of grape seed tablet candy weight difference±2.7%,no overrun phenomenon,hardness is 49.8 N,brittleness 0.86%,disintegration time 13.4 min meet the product requirements.(3)The scavenging rates of grape seed ultra-fine powdered candy against three free radicals were determined by comparing it with Vc.The results showed that the maximum scavenging rate of grape seed ultra-fine powdered candy against DPPH free radical was 89.35%,the maximum scavenging rate against ABTS free radical was 97.43%,and the maximum scavenging rate against hydroxyl free radical was 79.65%.Its antioxidant activity was better than that of Vc solution.By comparing the changes of total phenol and microorganism under normal temperature,the change of total phenol was determined as the main factor affecting the quality deterioration of grape seed tablet candy.The shelf life accelerated test was carried out by ASLT method,and the predicted shelf life of grape seed tablet candy under normal temperature was 187.5 days by Arrhenius equation.