Medicinal and health-care concentrated carrot juice and preparation method thereof

Abstract

The invention provides medicinal and health-care concentrated carrot juice, which contains not more than 50 percent of soluble solid matter and 0.0061 to 0.003 percent of carotenoid. A preparation method comprises the following steps of: removing core columns of carrots; removing more than 90 percent of sugar by using a reverse flow process; acidizing; breaking cell walls in a vacuum system; centrifuging the obtained product to separate juice from slag; homogenizing; concentrating the homogenized product; sterilizing the concentrate; and filling the sterile product to obtain the concentrated juice product. In the method, the carrot core columns are removed, so that the quality of the raw material and the carotene content can be improved effectively. In the method, the reverse flow process for desugaring the carrots has the advantages that: the used amount of water is small, sugar percolates quickly, and desugaring liquid can be used completely and converted into the product. In the invention, the cell wall breakage is completed in a vacuum system, so that the oxidational loss and brown stain of the carotene can be effectively prevented in a processing process. When the key technology is used for production, the extraction rate of the carotene can reach over 70 percent, and the concentrated carrot juice can meet the requirements of medicinal and health-care products on high-carotene industrial raw materials.

Description

technical field [0001] The invention relates to a method for preparing concentrated carrot juice for medical and health care, in particular to a method for enriching carotene from processed carrot raw materials, and belongs to the technical field of deep processing of fruits and vegetables. Background technique [0002] In January 1996, the National Cancer Institute of the United States announced that the experiment of preventing and treating lung cancer with chemically synthesized β-carotene tablets was discontinued. Taking 30mg of β-carotene tablets per day did not reduce the incidence of lung cancer at the end of the experimental period, but instead increased the incidence of lung cancer by 28% and the total mortality rate by 17% among smokers. Afterwards, the World Health Organization issued a bulletin pointing out that any chemically synthesized carotene preparation does not have the anti-cancer effect expected by the public, and eating more vegetables rich in β-car...

AI Technical Summary

Problems solved by technology

However, the existing technology is to process the carrot pulp and the stem with high pollutant content together, which affects the quality of the concentrated juice

The sugar content of carrot determines the concentration multiple of the concentrated juice. The higher the sugar content, the lower the concentration multiple, and vice versa. Increasing the concentration multiple can effectively increase the carotene content of the concentrated juice; but the prior art is to precook carrots, Rinse to remove sugar, but the removal is not complete. This quantitative tank-type pre-cooking and rinsing process requires 2-2.5 tons of water per ton of carrots, and all pre-cooking and rinsing water containing a certain amount of sugar and carotene is drained as wastewater.

Fully breaking carrot cells and reducing oxidation during the breaking process are the methods to directly increase the carotene content of concentrated juice; Among them, due to the strong oxidation reaction, the loss of carotene can reach more than 15%. The higher the temperature when breaking the wall, the longer the fine grinding time, the greater the loss

When the soluble solid content of carrot concentrate exceeds 50%, the non-enzymatic browning is accelerated, which directly affects the quality of the concentrated juice; (such as fat-soluble carotene, nucleic acid substances, proteins, etc.) are all water-insoluble substances. When the soluble solids reach 60%, non-enzymatic browning will turn the concentrated carrot juice into brown, which cannot meet the requirements of medical and health products. Demand for High Carotene Industrial Raw Materials

Images