Method for fresh-keeping on cherry tomato by algal polysaccharide

Abstract

The invention relates to a method for fresh-keeping on cherry tomato by algal polysaccharide. The method comprises the following steps of cleaning fresh alga as a raw material, carrying out chopping, carrying out high-speed tissue homogenization, carrying out extraction for 6-8h by ethanol with a concentration of 85-90% and volume 10-12 times that of the raw material, carrying out suction filtration, transferring the filtrate to a rotary evaporator to obtain algal polysaccharide crude extract, carrying out extraction on the crude extract by anhydrous ether with volume 5-8 times that of the crude extract, collecting the water layer, carrying out concentration by the rotary evaporator to obtain algal polysaccharide, removing freshly picked cherry tomatoes with worm channels and mechanical damage, immersing the undamaged cherry tomatoes in the obtained algal polysaccharide solution for 3-5min, carrying out airing, packaging the dried cherry tomatoes by a polyethylene film, and carrying out storage, wherein in storage, an inspection process is carried out regularly so that abnormal fruits are timely removed. The method utilizes natural algal polysaccharide as a protective agent to realize fresh-keeping of cherry tomatoes and is safe. The algal polysaccharide is nontoxic and nuisanceless, can replace a chemical bactericide and an antiseptic for fresh-keeping of cherry tomatoes, prevents the chemical bactericide-caused pollution on the environment and solves food safety problems.

Description

technical field [0001] The invention relates to the field of preservation of fruits and vegetables, in particular to the preservation of cherry tomatoes. Background technique [0002] Cherry tomatoes are also called pearl tomatoes and cherry tomatoes, which can be both vegetables and fruits. It can also be made into candied fruit. The diameter of the fruit is about 1-3 cm. It is bright red and green (there are also new varieties with medium yellow, orange yellow, emerald green and other colors). It has a sweet taste, no seeds, good taste, high nutritional value and unique flavor , eating and viewing the best of both worlds, favored by the majority of consumers. [0003] Cherry tomatoes are also known as "little golden fruit" and "fruit of love" abroad. It is both a vegetable and a fruit. It is not only bright in color and beautiful in shape, but also delicious in taste and rich in nutrition. In addition to containing all the nutrients of tomatoes, its vitamin content is 1....

AI Technical Summary

Problems solved by technology

[0005] Cherry tomatoes belong to berry fruits with delicious taste and rich nutritional value. However, cherry tomatoes have high respiratory intensity, poor protective tissue, difficult storage and preservation, and short storage and shelf life, which will bring great harm to fruit farmers and consumers. to great loss

And the fresh-keeping method of conventional berry class fruit is mainly to adopt chemical bactericide at present, and a large amount of use of chemical bactericide can cause pathogenic microorganism to produce drug resistance, and cause environmental pollution; Difficult to wash off chemical fungicides thoroughly, which will cause hidden dangers to human health after consumption