Method for prolonging refreshing time of yellow peach slices

Abstract

The invention discloses a method for prolonging the refreshing time of yellow peach slices. The method comprises the following steps of: (1) preparing a film solution : dissolving chitosan into distilled water, stirring, then, adding glacial acetic acid to prepare a chitosan solution, stirring at the temperature of 18-22 DEG C, adding glycerol and Tween 80 into the chitosan solution and stirring, regulating the pH value to be 5.6 by using a NaOH water solution, and filtering to obtain the film solution; and (2) carrying out film coating treatment: immersing the slices into the film solution, and taking out the slices and draining. According to the method, the loss of vitamin C in the yellow peach slices can be effectively reduced, the increases of the activity of polyphenol oxidase and the relative conductivity are retarded, the browning is inhibited, and the loss of juice is reduced; and the shelf lives of the yellow peach slices are obviously prolonged, so that the yellow peach slices have excellent shelf quality.

Description

technical field [0001] The invention relates to the technical field of storage and preservation of agricultural products, in particular to a method for extending the preservation period of yellow peach slices. Background technique [0002] Edible films are widely used because they can extend the shelf life of food. Edible films can not only inhibit moisture loss and gas exchange, but also serve as carriers for antioxidants, antibacterial agents, flavors, etc., and can also be used as packaging materials for food. Chitosan is the second most abundant natural polymer after cellulose in nature, and it is composed of N-acetyl-D-glucosamine through β(1–4) glycosidic bonds. Chitosan film has good mechanical and biochemical properties, and is non-toxic, antibacterial, and biodegradable. It is an ideal outer film of food preservatives and has been applied in meat products, dairy products, and fruit and vegetable processing. [0003] Yellow peach (Prunus persicu L.Batsch.) is a pop...

AI Technical Summary

Problems solved by technology

In terms of freshness and flavor, the products cannot meet the increasing requirements and attention of consumers on food safety and delicious flavor.

Moreover, traditional fresh-keeping methods can only maintain a certain fresh-keeping effect in a short period of time, and the shelf life is very short, which brings great inconvenience to producers and consumers.

Images