CN1097432C

CN1097432C - Date preserving method at under zero temperature

Info

Publication number: CN1097432C
Application number: CN00129686A
Authority: CN
Inventors: 邓西民
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-10-12
Filing date: 2000-10-12
Publication date: 2003-01-01
Anticipated expiration: 2020-10-12
Also published as: CN1288671A

Abstract

The present invention relates to a freezing-temperature fresh keeping method for storing date. Fresh date which is processed through wash and precooling is put in a device for preservation, and the device can keep high humidity in a low temperature environment below zero. The temperature range is from the temperature below zero DEG C to the temperature above the freezing point of date fruit. The relative humidity is from 90% to 99%. By adopting the method, the jujube can be stored for fresh keeping for 4 to 6 months without freezing. 90% to 95% of the essential nutrient content and the fresh food quality of the jujube fruit can be kept after the store.

Description

A kind of method of ice temperature fresh-keeping storage jujube

The invention belongs to fruit freshness preserving storage field, relate to a kind of method of ice temperature fresh-keeping storage jujube.

Existing the storage of fresh jujube method has two kinds of refrigeration and cold storage methods.Application number is that 89109534 patent application proposes to shine with ultraviolet ray and finds time to seal low temperature storage method.Application number is 98107115 patent application proposition branch low temperature section, with the red date fresh-keeping storage practice of ultraviolet radiation sterilization.Said method can only be preserved jujube about 3 months, and the part date fruit takes place by softening rotting.The inventor's the patent (patent No.: 98102227.8) propose the chilled storage method.This method can be preserved jujube 12 months, but its application is subjected to the restriction of jujube kind and service condition.

The fresh-keeping and preserving method that the purpose of this invention is to provide a kind of jujube can be preserved bright date fruit more than 4 months, keeps the nutritional labeling and the fresh food quality of jujube constant substantially.

Task of the present invention is achieved in that

1, the bright jujube that will select for use is pre-chilled to about 0 ℃;

2, pack with the breathable plastic bag through the bright jujube of precooling treatment, put into and to keep high phase at the sub-zero temperature environment

Preserve in the freezer to humidity;

3, the reserve temperature scope of jujube 0 ℃ with down to more than the freezing point temperature of date fruit, relative humidity

90％-99％。

The present invention has following benefit compared with the prior art:

1, adopt this method to preserve back date fruit weight-loss ratio less than 1% with the storage of fresh jujube more than 4 months,

Good fruit rate can reach 90%, and main nutrient composition vitamin C storage rate can reach 90%, fresh food

The quality guarantee holdup can reach 90%.

2, this method can be used for industrialization commodity production, and is free from environmental pollution.

Embodiment 1: bright jujube is preserved under-1 ℃ and 90-99% relative humidity condition, preserved after 4 months fruit

Weight-loss ratio is got well fruit rate 90%, vitamin C storage rate 90%, fresh food quality conservation rate 90% less than 1%.Embodiment 2: bright jujube is preserved under-3 ℃ and 90-99% relative humidity condition, preserved after 4 months fruit

Weight-loss ratio is got well fruit rate 95%, vitamin C storage rate 90%, fresh food quality conservation rate 90% less than 1%.Embodiment 3: bright jujube is preserved under near its freezing point temperature and 90-99% relative humidity condition, preserved 4

After month, the fruit weight-loss ratio is got well fruit rate 95%, vitamin C storage rate 95%, fresh food quality less than 1%

Conservation rate 90%.

Claims

1, a kind of jujube fresh-keeping and preserving method, after it is characterized in that bright jujube pack with the breathable plastic bag, 0 ℃ with down to more than the fruit freezing point temperature, preserves in the low temperature and high relative humidity device of relative humidity 90%-99%.

2, jujube fresh-keeping and preserving method according to claim 1 is characterized in that described packaging bag is the common plastics bag, is equipped with air-vent on the bag.

3, jujube fresh-keeping and preserving method according to claim 1 is characterized in that described low temperature and high relative humidity device is for keeping the freezer of high relative humidity at the sub-zero temperature environment.