Study On Change Bete Carotene In Lycium Barbarum L.during Processing

T.vcium bararum L. contains much more beta-carotene, it is the highest of the all plants. Beta-carotene is an important source of vitamin A, drinking regularly will help improve vision. But it is sensitive material, extremely easy in the machining process loss. In this paper, Lycium bararum L. as the research object, from the point of view of beta-carotene changes, from the different dehydrated process of virgin pulp, clear juice, and Lycium bararum L. to function ingredient changes. For nutrition elements in the machining process of the loss of phenomenon, the paper brings forward the feasible solution. The results were as follows:1. Virgin pulp in the process of production add0.2%Vc and0.2%citric acid, can rise to protect virgin pulp color, luster, stability. The best vacuum deairing with the process was60℃,0.067Mpa, the beta-carotene was9.86mg/100g; It can meet the national food health inspection standards for drinks colonies of several requirements (Total bacterial coun≤<100cfu/mL), total bacterial count is47cfu/mL, this time beta-carotene content is4.93mg/100g; Take brown packaging materials in the later can avoid beta-carotene degradation during storage, Storage to90d, the beta-carotene content of brown packing is4.37mg/100g, compare to white packing, the storage rate incase is12.4%.2. Dealing Lycium bararum L. with0.08%squeeze enzyme at pH4.6and45℃for80min; Under this condition, the juice beta-carotene content was incase19.3%.The results showed that the optimum processing condition for squeezing of Lycium bararum L. by means of pectinase enzymolysis are:adding0.3%pectinase (20000IU), at50℃for1h; Under this condition, beta-carotene content was14.27mg/100g.The order of importance of the two factors affecting the sterilization of Lycium bararum L. juice, microwave power9Hz, temperature74℃, and treatment time. Under this condition, Total bacterial count<10cfu/mL, and this way can protect beta-carotene oxidation because of the high temperature sterilization process.3. The results indicated that the effective of spray drying is needly, the rate of setting power has reached89.5%when the dosage of additives were maltodextrin60%, inlet temperature180℃, feeding rate55mL/min. It was colorful, smoothly, can keep the90.16%beta-carotene of Lycium bararum L. virgin pulp, is14.57mg/100g.4. Different dehydrated technology can improve the product in the amount of free amino acids, and zeaxanthin, cryptoxanthin content, but for other functional components, such as crude fat, protein and beta-carotene will result in different degree of loss.