Freeze-drying technology of bletilla striata vacuum freeze-drying

A vacuum freeze-drying and vacuum-drying technology, applied in the direction of drying solid materials, drying solid materials without heating, drying, etc., can solve the problems of excessive sulfur dioxide content, hidden dangers of food safety, easy yellowing of white and flakes, and achieve dissolution. High speed, high crushing rate and good appearance

Pending Publication Date: 2019-03-26
九信(武汉)中药研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

White and without sulfur fumigation, it is easy to produce black spots. After sulfur fumigation, the cut surface is white and beautiful, but it is easy to cause the sulfur dioxide content to exceed the standard, and it will also

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] White and pretreatment: Wash the white and tubers with water to remove the soil, remove the fibrous roots, and drain the surface water.

[0042] Plate and slice: slice the drained baiji with a medicine cutter or manually, the thickness of the thin slices is 0.2cm, and the thickness of the thick slices is 0.5cm, and the cut baiji slices are stacked on the tray. The stacking height of white and slices on the tray is 3cm.

[0043] Freeze-drying preparation: put the plated brine on the plate in the freeze-drying chamber of the vacuum freeze dryer, insert the temperature probe into the brine, and cover the freeze-drying cover.

[0044] Pre-freezing: Start the compressor of the vacuum freeze dryer for refrigeration, lower the temperature of the material to -30°C, and maintain it for 4 hours.

[0045] Vacuum drying: Turn on the cold trap refrigeration mode, and turn on the vacuum pump and vacuum gauge to evacuate the freeze-drying chamber. The refrigeration temperature of the...

Embodiment 2

[0057] Determination method of polysaccharide content:

[0058] Take glucose to make the reference substance solution, take the reference substance solution 0mL, 0.1mL, 0.2mL, 0.4mL, 0.6mL, 0.8mL, 1.0mL, 1.2mL and place them in 8 test tubes, add water to 2.0mL, shake well, Accurately add anthrone-sulfuric acid solution 4.5mL. Mix well, heat in a boiling water bath for 3 minutes, take out, cool in cold water for 10 minutes, and use the corresponding reagent as a blank control. The absorbance was measured at a wavelength of 625nm, and the regression equation was obtained by taking the absorbance (Y) as the ordinate and the content (X) as the abscissa.

[0059] Accurately weigh 0.3 g of white powder processed in Comparative Examples 1-5 and Example 1 respectively, place in a flat-bottomed flask, accurately add 60 mL of water, weigh, reflux for extraction for 45 minutes, let cool, add weight with water, shake well, filter. Accurately take 5mL of the filtrate, add 30mL of 80% et...

Embodiment 3

[0064] Determination method of polysaccharide content:

[0065] Take 5 μL of water drops on the sugar meter, after zero adjustment, use a micropipette to take 10 μL of the solution to be tested in Comparative Examples 1-5 and Example 1 on the sugar meter, record each value measured, and measure it with water. Set the sugar meter to zero, and then measure the sugar content of the next liquid to be tested.

[0066] The measurement results are as follows:

[0067] Table 2 sugar content measuring result to the polysaccharide content in embodiment and comparative example

[0068]

[0069] Can draw by the polysaccharide content determination result in Table 1 and Table 2 comparative example 1-5 and embodiment 1, the polysaccharide content in embodiment 1 is the highest, namely the freeze-drying process of vacuum freeze-drying white and provided by the present invention The content of polysaccharides in white and rice is the highest. After freeze-drying, the internal str...

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Abstract

The invention provides a freeze-drying technology of bletilla striata vacuum freeze-drying, and relates to the field of bletilla striata processing. The freeze-drying technology comprises the following steps of pre-freezing: putting bletilla striata in a vacuum freeze-drying machine, cooling bletilla striata to be minus 30 DEG C or below, and maintaining the temperature for 3 h to 4 h; and vacuumdrying: starting a cold trap refrigeration mode, controlling refrigeration temperature of a cold trap device to be minus 60 DEG C or below, maintaining the vacuum degree to be 30 Pa or below, and carrying out drying treatment. According to the freeze-drying technology of bletilla striata vacuum freeze-drying provided by the invention, effective components of fresh bletilla striata can be remainedto the greatest extent, freeze-dried bletilla striata are beautiful in section and loose in structure, and can be directly smashed, the smashing rate is high, the dissolution rate is high during decoction, storage time of freeze-dried bletilla striata is prolonged, and mass is light.

Description

technical field [0001] The invention relates to the field of white rice processing, in particular to a freeze-drying process of vacuum freeze-dried white rice. Background technique [0002] The existing blanching and drying methods are: cleaning and removing fibrous roots→cooking and cooling→cutting→drying. Baiji destroys the enzymatic activity of Baiji by boiling or steaming, thereby preventing the redox reaction inside Baiji. However, high temperature will accelerate the decomposition of the active ingredients of Baiji and reduce the efficacy of Baiji. White and without sulfur fumigation, it is easy to produce black spots. After sulfur fumigation, the cut surface is white and beautiful, but it is easy to cause the sulfur dioxide content to exceed the standard, and it will also bring hidden dangers to food safety. In addition, traditionally processed baiji flakes tend to turn yellow and are not easy to preserve, and there are problems such as complicated process, heavy wo...

Claims

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Application Information

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IPC IPC(8): F26B5/06
CPCF26B5/06
Inventor 杨群沈华钟淑梅彭璐刘佳文付伟
Owner 九信(武汉)中药研究院有限公司
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