CN101390535B

CN101390535B - Dashi early ripening plum fresh-keeping agent and preparation method thereof

Info

Publication number: CN101390535B
Application number: CN2008100796839A
Authority: CN
Inventors: 赵志磊; 顾玉红; 吴广臣; 李小亭; 王庭欣
Original assignee: Hebei University
Current assignee: Hebei University
Priority date: 2008-11-04
Filing date: 2008-11-04
Publication date: 2011-01-26
Anticipated expiration: 2028-11-04
Also published as: CN101390535A

Abstract

The invention provides a Dashi early ripening plum preservative, which comprises the following components based on weight proportion: 0.5-0.75% of chitosan, 0.8-1.5% of acetic acid, 0.0045-0.006% of gibberellin, 0.1-0.5 % of Tween 80, and the residual water. The invention can be sprayed or coated on the Dashi early ripening plum through soaking, and naturally attached on the fruit surface after air-drying to form a layer of fresh-keeping film, so as to increase the fruit brightness, prevent water evaporation and suppress fruit respiration, thereby maintaining the quality of the Dashi early ripening plum. The fruit coated with the preservative through spraying or soaking can maintain good quality after being stored for 12-15 days at ambient temperature. Compared with the existing preservation technique, the preservative has simple formula and is easy to operate, which can effectively maintain the hardness, taste and nutrients of the fruit at ambient temperature.

Description

A kind of Dashi early ripening plum fresh-keeping agent and preparation method

Technical field

The present invention relates to the antistaling agent preparation method in a kind of Storage and Processing of Agricultural Products field, specifically is the coating antistaling agent preparation method that a kind of suitable Da Shi early gives birth to Lee's room temperature storage.

Background technology

It is extremely early mature Lee kind that Da Shi early gives birth to Lee, and this Lee is really gone on the market early, the quality height, and the cultivated area in China increases sharply in recent years.Because the duration high temperature season of gathering of plum fruit, it is vigorous to adopt the back respiratory metabolism, and the very fast at normal temperatures maturation of fruit is softening, shelf life only 5-7 days, Lee fruit that can not in time sell loses commodity value very soon, has had a strong impact on orchard worker's economic benefit, and Higher output is not accompanied by a higher income to cause the orchard worker.Living Lee's after-ripening is early softened although traditional deepfreeze can effectively delay Da Shi, and Da Shi early gives birth to the cold quick property fruit of Prunus, and long-time at low temperatures storage can cause local flavor thin out, and g etc. damage to plants caused by sudden drop in temperature symptom.And the growing area that Da Shi early gives birth to Lee mostly is outlying rural area and mountain area, does not set up freezer as yet because of economic cause mostly, and the storage period and the freshness that how can prolong plum fruit at normal temperatures to greatest extent are the focuses of a research always.The purpose that plum fruit is filmed mainly is to suppress fruits respiratory, prevents the evaporation of moisture, and improves the fineness of fruit face, can keep nutrition and taste in the fruit transporting procedures preferably.

Find by literature search, Chinese patent application number: CN94101978.0, denomination of invention: the configuration of gram polysaccharid derivative fruit and vegetable fresh-keeping agent, this patent is with natural shrimp shell, the crab shell is produced shitosan, adds activating agent and auxiliary agent configuration antistaling agent again, this process complexity, the relative cost height, and easily produce peculiar smell; CN101120697A, denomination of invention: carboxymethyl chitosan fruit plastics and preparation method thereof, this patent by CMC, glycerine, Tween 80, tocopherols etc. are formulated, the composition relative complex, and the normal-temperature fresh-keeping effect of Da Shi early being given birth to Lee is not good enough, and fruit only can not prolong 1-2 days than filming.

Summary of the invention

The object of the present invention is to provide a kind of Da Shi early to give birth to normal temperature antistaling agent of Lee and preparation method thereof, overcome the normal temperature shelf life that prior art is not enough and significant prolongation Da Shi early gives birth to Lee.

Technical scheme of the present invention is achieved in that this Dashi early ripening plum fresh-keeping agent, and its composition comprises following part by weight: shitosan 0.5-0.75%, glacial acetic acid 0.8-1.5%, gibberellin 0.0045-0.006%, Tween 80 0.1-0.5%, water surplus.

Described Dashi early ripening plum fresh-keeping agent, the composition of concrete technical scheme comprises: shitosan 0.5%, glacial acetic acid 1.5%, gibberellin 0.0055%, Tween 80 0.3%, water surplus.

Described Dashi early ripening plum fresh-keeping agent, the composition of concrete technical scheme comprises: shitosan 0.6%, glacial acetic acid 0.8%, gibberellin 0.0045%, Tween 80 0.1%, water surplus.

Described Dashi early ripening plum fresh-keeping agent, the composition of concrete technical scheme comprises: shitosan 0.75%, glacial acetic acid 1.1%, gibberellin 0.006%, Tween 80 0.5%, water surplus.

The preparation method of above-mentioned Dashi early ripening plum fresh-keeping agent, it is characterized in that: glacial acetic acid is placed on mixing in the water, add shitosan and be stirred to dissolving fully, regulate pH value to 5.3-5.8 with the NaOH of 1-2%, adding Tween 80 stirs, gibberellin is joined in the chitosan solution with the dissolving of 1-5 milliliter ethanol, can use behind the mixing.

The present invention can early give birth to spraying of lijin's row or dip-coating to Da Shi, forms one deck preservative film through air-dry back nature attached to fruit surface, increases fruit brightness, prevents water evaporates, suppresses the respiration of fruits effect, thereby plays the effect that keeps Da Shi early to give birth to Li Pinzhi.The fruit of spraying of the present invention or dip-coating still keeps better quality behind 12-15 days room temperature storages.Compare with existing preservation technique, have prescription simply, maneuverable characteristics, the while effectively keeps hardness, taste and the nutritional labeling of fruit again at normal temperatures.

The specific embodiment

Embodiment 1

Glacial acetic acid is placed on mixing in the water, and ultimate density is 1.5%, adds shitosan and is stirred to dissolving fully, and ultimate density is 0.5%, regulates pH value to 5.3-5.8 with the NaOH of 1-2% at last, and the Tween 80 of adding 0.3% stirs; Gibberellin is joined in the chitosan solution with the dissolving of 1-5 milliliter ethanol, and gibberellin concentration is 0.0055%, can use behind the solution mixing.

Green ripe Da Shi early gives birth to 200 of Lee, and dipping takes out after 1 minute and dries in antistaling agent, contrast fruit clear water dipping 1 minute, and the fruit of different disposal is put into fruit frame room temperature storage 12 days, and it is as follows to measure fruit quality:

Room temperature storage 12 days	Soluble solid content (%)	Hardness kilogram/square centimeter	Titratable acid content (%)	Good fruit rate (%)
					The contrast non-processor	1.9	0	0.2	0
Antistaling agent is handled	5.6	3.2	0.9	100

Embodiment 2

Glacial acetic acid is placed on mixing in the water, and ultimate density is 0.8%, adds shitosan and is stirred to dissolving fully, and ultimate density is 0.6%, regulates pH value to 5.3-5.8 with the NaOH of 1-2% at last, and the Tween 80 of adding 0.5% stirs; Gibberellin is joined in the chitosan solution with the dissolving of 1-5 milliliter ethanol, and gibberellin concentration is 0.045%, can use behind the solution mixing.

Embodiment 3

Glacial acetic acid is placed on mixing in the water, and ultimate density is 1.1%, adds shitosan and is stirred to dissolving fully, and ultimate density is 0.75%, regulates pH value to 5.3-5.8 with the NaOH of 1-2% at last, and the Tween 80 of adding 0.5% stirs; Gibberellin is joined in the chitosan solution with the dissolving of 1-5 milliliter ethanol, and gibberellin concentration is 0.006%, can use behind the solution mixing.

Listed examples of the present invention is intended to further illustrate Dashi early ripening plum fresh-keeping agent and preparation method and application direction, and scope of the present invention is not constituted any restriction.

Claims

1. Dashi early ripening plum fresh-keeping agent, its composition comprises following part by weight: shitosan 0.5-0.75%, glacial acetic acid 0.8-1.5%, gibberellin 0.0045-0.006%, Tween 80 0.1-0.5%, water surplus, its preparation method are that glacial acetic acid is placed on mixing in the water, add shitosan and are stirred to dissolving fully, regulate pH value to 5.3-5.8 with the NaOH of 1-2%, add Tween 80 and stir, gibberellin is joined in the chitosan solution with the dissolving of 1-5 milliliter ethanol, can use behind the mixing.

2. Dashi early ripening plum fresh-keeping agent according to claim 1 is characterized in that: its composition comprises: shitosan 0.5%, glacial acetic acid 1.5%, gibberellin 0.0055%, Tween 80 0.3%, water surplus.

3. Dashi early ripening plum fresh-keeping agent according to claim 1 is characterized in that: its composition comprises: shitosan 0.6%, glacial acetic acid 0.8%, gibberellin 0.0045%, Tween 80 0.1%, water surplus.

4. Dashi early ripening plum fresh-keeping agent according to claim 1 is characterized in that: its composition comprises: shitosan 0.75%, glacial acetic acid 1.1%, gibberellin 0.006%, Tween 80 0.5%, water surplus.