Freshness retaining method of fresh-cut celery

Abstract

The invention provides a method for retaining freshness of fresh-cut celery by combining ozone water washing and controlled atmosphere packaging. An ozone concentration in the ozone water is 0.9-1 milligram / L. Vacuum pre-cooling is carried out on fresh picked celery, screen grouping is carried out from aspects such as color, hardness and aroma, medium-well celery uniform in length and size is selected in each group, leaves removal, rib removal, cutting, washing and drying are carried out, the celery is filled in a controlled atmosphere packaging bag, 5% of O2, 10% of CO2 and 85% of N2 are filled in the packaging bag, heat sealing is carried out, and the celery is placed in a constant temperature and humidity box at the temperature of 2-4 DEG C for storage. The method has the advantages of effectively restraining reduction of sensory quality, increase of weight-loss ratio, decomposition of vitamin C and chlorophyll and increase of total bacterial count and membrane permeability. Compared with a control group washed by distilled water, the freshness retaining method can obviously prolong shelf life of the fresh-cut celery to 50 days. The freshness retaining method is simple, convenient, practical, low in cost, safe and free of residues.

Description

[0001] technical field [0002] The invention relates to a fresh-keeping method for vegetables, in particular to a fresh-keeping method for celery, especially a fresh-cut fresh-cut celery method. Background technique [0003] Celery is one of the leafy vegetables that people generally eat in daily life. It is not only rich in protein, vitamins, inorganic salts and other nutrients, but also contains active substances such as apigenin, berganolide and volatile oil. It has a special antihypertensive effect. , lowering blood fat, anticancer and other medicinal value. However, the quality of postharvest celery declined rapidly, mainly manifested as dehydration wilting, degreening and yellowing, and tissue aging. The storage and preservation of celery mainly include ordinary refrigeration, controlled atmosphere storage, preservative treatment and coating preservation. [0004] With the continuous improvement of people's living standards, fresh-cut vegetables are also called cut ...

AI Technical Summary

Problems solved by technology

[0010] During the storage process of fresh-cut celery, its sensory quality, weight loss rate, membrane permeability, vitamin C content, chlorophyll content and total number of colonies, etc. will have a series of changes. The technical problem to be solved by the present invention is to avoid the traditional fresh-keeping methods Due to the disadvantages of large investment, high production cost, and residues, the post-harvest celery is stored in an environment at 2-4°C after pre-cooling, grading, leaf removal, cutting, washing with ozone water, draining, and modified atmosphere packaging. Regularly detect the above indicators in order to prolong the shelf life of fresh-cut celery, so as to provide certain technical support for the storage and preservation of fresh-cut celery

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