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Fresh keeping method of ginseng or American ginseng through freeze drying

A fresh-keeping method and vacuum freeze-drying technology are applied to the fresh-keeping field of freeze-drying of ginseng or American ginseng, can solve the problems of high cost, inconvenient transportation and storage of ginseng, etc., and achieve the effects of convenient transportation, crisp and fresh taste, and simple processing process.

Pending Publication Date: 2016-11-09
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method can keep fresh in a short time, it is costly and extremely inconvenient for the transportation and storage of ginseng

Method used

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  • Fresh keeping method of ginseng or American ginseng through freeze drying
  • Fresh keeping method of ginseng or American ginseng through freeze drying
  • Fresh keeping method of ginseng or American ginseng through freeze drying

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A kind of fresh-keeping method of ginseng freeze-drying, comprises the following steps:

[0018] (1) Pretreatment: remove the soil and weeds at the root of the wild ginseng harvested in good time, wash with sterile water, and dry the surface moisture;

[0019] (2) freezing: freezing the wild ginseng obtained in step (1) at -38°C for 2 hours in a cold storage to obtain frozen wild ginseng;

[0020] (3) Vacuum freeze-drying: place the frozen wild ginseng in a vacuum freeze-dryer, control the vacuum degree to 20Pa, and the cold trap temperature to be-38°C, freeze-dry for 12 hours, take out; measure the water content to be 12%;

[0021] (4) Sealed and vacuum packed.

[0022] HPLC quantitative analysis of ginsenosides:

[0023] Experimental equipment and reagents:

[0024] Agilent 1100 HPLC, including online degasser and quaternary pump. Ginsenoside Rg 1 , Re, Rb 1 , Rg 2 ,, Rc, Rb 2 , Rd reference substance was purchased from China Institute for the Control of Pharm...

Embodiment 2

[0038] A kind of fresh-keeping method of ginseng freeze-drying, comprises the following steps:

[0039] (1) Pretreatment: remove the soil and weeds at the roots of the planted ginseng harvested in good time, wash with sterile water, and dry the surface moisture;

[0040] (2) Freezing: the planted ginseng obtained in step (1) was frozen at -35° C. for 3 hours in a cold storage to obtain frozen planted ginseng;

[0041] (3) Vacuum freeze-drying: place the frozen-planted ginseng in a vacuum freeze-dryer, control the vacuum degree to 15 Pa, and the cold trap temperature to be -35°C, freeze-dry for 13 hours, take out; measure the water content to be 9%;

[0042] (4) Sealed and vacuum packed.

[0043] table 3:

[0044]

[0045] American ginseng was used to replace the ginseng of this embodiment, and the others were the same as this embodiment, and the measured water content was 8.5%.

[0046] Table 4:

[0047]

Embodiment 3

[0049] A kind of fresh-keeping method of ginseng freeze-drying, comprises the following steps:

[0050] (1) pretreatment: the tissue cultured ginseng adventitious root harvested in good time is cleaned with sterile water, and the surface moisture is dried;

[0051] (2) Freezing: freeze the tissue cultured ginseng adventitious root obtained in step (1) at -40° C. for 1 hour in a cold storage to obtain the frozen tissue cultured ginseng adventitious root;

[0052] (3) Vacuum freeze-drying: place the adventitious root of frozen tissue cultured ginseng in a vacuum freeze dryer, control the vacuum degree to 30Pa, the cold trap temperature is -40°C, freeze-dry for 11 hours, take out; measure the water content to be 2%;

[0053] (4) Sealed and vacuum packed.

[0054] table 5:

[0055]

[0056] American ginseng is used to replace the ginseng of this embodiment, and the others are the same as this embodiment, and the measured water content is 2%.

[0057] Table 6:

[0058]

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Abstract

The invention discloses a fresh keeping method of ginseng or American ginseng through freeze drying. The fresh keeping method comprises the following steps of (1) cleaning the timely harvested ginseng or the timely harvested American ginseng with sterile water, and performing airing to remove surface moisture; (2) freezing the ginseng or the American ginseng obtained in the step (1) under minus 35 to minus 40 DEG C for 1-3h so as to obtain the frozen ginseng or the frozen American ginseng; (3) putting the frozen ginseng or the frozen American ginseng in a vacuum freeze dryer, controlling the vacuum degree to be 15-30Pa, and the cold trap temperature to be minus 35 DEG C to minus 40 DEG C, performing freeze drying for 11-13 hours, and taking out the freeze-dried ginseng or the freeze-dried American ginseng; and (4) performing packaging in a sealing and vacuumizing manner. Through the adoption of the method disclosed by the invention, effective components and nutrient components of the ginseng are hardly destroyed, after rehydration, the fresh degree of the ginseng is kept, the mouth feel is clear, crisp, fresh and tender, the processing process is simple, the cost is low, the fresh keeping effect is good, and the transportation is convenient. The decreasing degree of the content of main effective components of the ginseng or the American ginseng which is treated by the method disclosed by the invention and then is rehydrated is smaller than that of sun-dried ginseng or sun-dried American ginseng.

Description

technical field [0001] The invention belongs to the field of plant preservation, and in particular relates to a fresh-keeping method of freeze-drying ginseng or American ginseng. Background technique [0002] Ginseng and American ginseng products have always been sold as dry products such as red ginseng, white ginseng, and raw sun-dried ginseng, or used these dried products as raw materials for further processing, such as ginseng essence, ginseng tablets and other tonics, and fresh ginseng is directly used or various products are processed. many. In recent years, with the development of medicine, daily chemical industry and food industry, the demand for fresh ginseng is increasing, and the supply period of fresh ginseng is required to be longer and longer. According to research, the total saponin content of fresh ginseng is 0.35% higher than that of raw sun-dried ginseng, 1.31% higher than that of red ginseng, and 2.76% higher than that of sugar ginseng. Therefore, in rece...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23L3/44
CPCA23L3/44
Inventor 高文远王娟李金鑫李静李建丽刘书杰
Owner TIANJIN UNIV