CN1062718C - Freezing storage method for fresh date - Google Patents
Freezing storage method for fresh date Download PDFInfo
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- CN1062718C CN1062718C CN98102227A CN98102227A CN1062718C CN 1062718 C CN1062718 C CN 1062718C CN 98102227 A CN98102227 A CN 98102227A CN 98102227 A CN98102227 A CN 98102227A CN 1062718 C CN1062718 C CN 1062718C
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- freezing
- jujube
- storage method
- fresh
- fresh date
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Abstract
The present invention relates to a freezing storage method for fresh date. Fresh jujube which is cooled to 0 to 5 DEG C through precooling is frozen at 30 DEG C below zero to 192 DEG C below zero; the freezing jujube is stored at 20 DEG C below zero to 192 DEG C below zero. The defreezing temperature is from 0 to 5 DEG C. The relative humidity is larger than 50%. By adopting the method, the storage period of the jujube can be prolonged to more than 12 months. The jujube after freezing storage and unfreezing still retains the original nutrient components and the organoleptic quality of fresh food.
Description
The invention belongs to fruit chilled storage field, relate to a kind of jujube freezing storage method.
Existing the storage of fresh jujube method has refrigeration and iced storage method.Application number is 95113721 patent application proposition cobalt-60 radiation treatment method.Application number is 97120273 patent application proposition liquor facture.Said method maybe can not be realized the long preservation of bright jujube, or has changed the nutrition and the edible quality of bright jujube.The Hao Li of Agricultural University Of Shanxi equality people once reported in 1991 jujube-25 ℃ freezing, preserve 6 months nutritional labelings at-18 ℃ and change not quite, but storage consequence rhicnosis contracts the sensible quality variation.
The purpose of this invention is to provide a kind of the storage of fresh jujube method.This method need not be added any chemical substance, does not use radioactive radiation source, and fresh date fruit storage life was extended to more than 12 months, keeps the nutritional labeling of bright jujube and fresh food quality constant substantially.
Task of the present invention is achieved in that
1, the bright jujube precooling that will select for use cools to 0 to 5 ℃;
2, freezing through the bright jujube of precooling treatment at-30 ℃ to-192 ℃ (liquid nitrogen);
3, freezing jujube is sealed with plastic bag packaging, preserve, be packaged in-192 ℃ of freezing jujubes with the cotton yarn cloth bag and in liquid nitrogen, preserve at-20 ℃ to-40 ℃ storerooms;
4, before edible, freezing jujube thaws at cold compartment of refrigerator, 0 to 5 ℃ of thaw point, and relative humidity is greater than 50%.
The present invention has following beneficial effect compared with the prior art:
1, adopt this method the storage of fresh jujube phase can be extended to more than 12 months.Not elephant skin, nondiscolouring, free from extraneous odour after the jujube storage, sugared content does not reduce, and the vitamin content storage rate is more than 85%.
2, adopt this method to preserve bright jujube and do not need to add any chemical substance.
3, adopt this method to preserve bright jujube without any need for the radioactive substance radiation treatment.
4, this method can be used to carry out industrialization commodity production, does not pollute the environment.
Embodiment 1: will select for use after the bright jujube precooling-30 ℃ freezing, freezing jujube plastic bag packaging-20 ℃ of storages 12 months, thaws before edible, 0 to 5 ℃ of thaw point, relative humidity is greater than 50%.
Embodiment 2: will select for use after the bright jujube precooling-50 ℃ freezing, freezing jujube plastic bag packaging-20 ℃ of storages 12 months, thaws before edible, 0 to 5 ℃ of thaw point, relative humidity is greater than 50%.
Embodiment 3: will select for use after the bright jujube precooling-50 ℃ freezing, freezing jujube plastic bag packaging-40 ℃ of storages 12 months, thaws before edible, 0 to 5 ℃ of thaw point, relative humidity is greater than 50%.
Embodiment 4: use liquid nitrogen frozen after will selecting bright jujube precooling for use, freezing jujube plastic bag packaging-20 ℃ of storages 12 months, thaws before eating, 0 to 5 ℃ of thaw point, and relative humidity is greater than 50%.
Embodiment 5: use liquid nitrogen frozen after will selecting bright jujube precooling for use, freezing jujube plastic bag packaging-40 ℃ of storages 12 months, thaws before eating, 0 to 5 ℃ of thaw point, and relative humidity is greater than 50%.
Embodiment 6: pack with the cotton yarn cloth bag after will selecting bright jujube precooling for use, chilled storage is 18 months in the immersion liquid nitrogen, thaw before eating, and 0 to 5 ℃ of thaw point, relative humidity is greater than 50%.
Claims (3)
1, a kind of freezing storage method for fresh date, step comprise precooling, freezing, preserve and thaw, it is characterized in that:
1), will select for use bright jujube to cool to 0 to 5 ℃ through precooling, freezing at-30 to-192 ℃;
2), freezing jujube reserve temperature is-20 to-192 ℃, preserve with the packaging bag encapsulation;
3), freezing jujube thaw point is 0 to 5 ℃, relative humidity is greater than 50%.
2, freezing storage method for fresh date according to claim 1 is characterized in that: described packaging bag is common plastics bag or cotton yarn cloth bag.
3, freezing storage method for fresh date according to claim 1 is characterized in that: described thawing condition uses the normal domestic use cold storage chamber of refrigerator to realize.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98102227A CN1062718C (en) | 1998-06-05 | 1998-06-05 | Freezing storage method for fresh date |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98102227A CN1062718C (en) | 1998-06-05 | 1998-06-05 | Freezing storage method for fresh date |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1200878A CN1200878A (en) | 1998-12-09 |
| CN1062718C true CN1062718C (en) | 2001-03-07 |
Family
ID=5217213
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN98102227A Expired - Fee Related CN1062718C (en) | 1998-06-05 | 1998-06-05 | Freezing storage method for fresh date |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1062718C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104054881A (en) * | 2013-03-22 | 2014-09-24 | 沭阳县苏合农产品销售专业合作联社 | Processing method of red dates |
| CN103202330A (en) * | 2013-05-07 | 2013-07-17 | 辛万森 | Living date, medlar and apricot fresh-keeping storage method in circulation of commodities |
| CN103340233A (en) * | 2013-05-22 | 2013-10-09 | 灵武市果业开发有限责任公司 | Cold-chain logistics method for preserving fresh jujubes |
| CN108659957A (en) * | 2018-06-20 | 2018-10-16 | 吕梁学院 | The method that jujube extracts essential oil |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1124575A (en) * | 1995-08-14 | 1996-06-19 | 郭玉栋 | Fresh-keeping process for red dates |
| CN1181883A (en) * | 1997-11-11 | 1998-05-20 | 王照会 | Preservatizing method of red dates |
-
1998
- 1998-06-05 CN CN98102227A patent/CN1062718C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1124575A (en) * | 1995-08-14 | 1996-06-19 | 郭玉栋 | Fresh-keeping process for red dates |
| CN1181883A (en) * | 1997-11-11 | 1998-05-20 | 王照会 | Preservatizing method of red dates |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1200878A (en) | 1998-12-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: CHINA AGRICULTURAL UNIVERSITY Free format text: FORMER OWNER: DENG XIMIN Effective date: 20030103 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20030103 Address after: No. 2 Old Summer Palace West Road, Beijing, Haidian District Patentee after: China Agricultural University Address before: No. 21, No. 401, building 2, West Old Summer Palace Road, Beijing, Haidian District, No. 1 Patentee before: Deng Ximin |
|
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |