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Freeze-dried siraitia grosvenorii slices and preparation method thereof

A technology of Luo Han Guo and Luo Han Guo, applied in the preparation of freeze-dried Luo Han Guo slices, in the field of freeze-dried Luo Han Guo slices, can solve the problems of shrinkage of the surface of Luo Han Guo, loss of nutrients, poor shape, etc., achieve color retention, high production efficiency, and freeze-drying time short effect

Inactive Publication Date: 2016-11-23
陈素云
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantage of hot air drying is low energy consumption, but the disadvantage is serious loss of nutrients, shrinkage of the surface of Luo Han Guo, poor shape, discoloration, etc.
Microwave vacuum drying, the color of the dried product is better than hot air drying, but the loss of nutrients is more serious

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A preparation method for freeze-dried Momordica grosvenori slices, comprising the following steps:

[0024] (1) Select ripe, disease-free, and non-rotten fresh Luo Han Guo, and wash them with clean water;

[0025] (2) Slice the Luo Han Guo cleaned in step (1), and control the slice thickness at 1.5cm;

[0026] (3) Place the sliced ​​Luo Han Guo in step (2) in water at 90°C for 4 minutes;

[0027] (4) Place the dried Luo Han Guo in step (3) at 15°C for 2.5 hours;

[0028] (5) Place the Luo Han Guo after natural air-drying in step (4) in a freeze dryer, cool down, and pre-freeze for 6 hours when the temperature drops to -15°C; the time from room temperature to the pre-freezing temperature is 1 hour;

[0029] (6) Secondary freezing the Luo Han Guo pre-frozen in step (5) for 4 hours at a temperature of -25°C and a vacuum of 40Pa;

[0030] (7) Deep freeze the Luo Han Guo after the secondary freezing in step (6) for 7 hours under the conditions of a heating plate temperatu...

Embodiment 2

[0033] A preparation method for freeze-dried Momordica grosvenori slices, comprising the following steps:

[0034] (1) Select ripe, disease-free, and non-rotten fresh Luo Han Guo, and wash them with clean water;

[0035] (2) Slice the Luo Han Guo washed in step (1), and control the slice thickness to 1cm;

[0036] (3) Place the sliced ​​Luo Han Guo in step (2) in water at 90°C for 3 minutes;

[0037] (4) Place the dried Luo Han Guo in step (3) at 20°C for 2 hours;

[0038] (5) Place the Luo Han Guo after natural air-drying in step (4) in a freeze dryer, cool down, and pre-freeze for 7 hours when the temperature drops to -20°C; the time from room temperature to the pre-freezing temperature is 0.5 h;

[0039] (6) Secondary freezing the Luo Han Guo pre-frozen in step (5) for 3 hours at a temperature of -20°C and a vacuum of 50 Pa;

[0040] (7) Deep freeze the Luo Han Guo after the secondary freezing in step (6) for 8 hours under the conditions that the temperature of the heati...

Embodiment 3

[0043] A preparation method for freeze-dried Momordica grosvenori slices, comprising the following steps:

[0044] (1) Select ripe, disease-free, and non-rotten fresh Luo Han Guo, and wash them with clean water;

[0045] (2) Slice the Luo Han Guo washed in step (1), and control the slice thickness to 2cm;

[0046] (3) Place the sliced ​​Luo Han Guo in step (2) in water at 80°C for 5 minutes;

[0047] (4) Place the dried Luo Han Guo in step (3) at 20°C for 2 hours;

[0048] (5) Place the Luo Han Guo after natural air-drying in step (4) in a freeze dryer, cool down, and pre-freeze for 8 hours when the temperature drops to -10°C; the time from room temperature to the pre-freezing temperature is 1 hour;

[0049] (6) Secondary freezing the Luo Han Guo pre-frozen in step (5) for 5 hours at a temperature of -30°C and a vacuum of 30Pa;

[0050] (7) Deep freeze the Luo Han Guo after the secondary freezing in step (6) for 5 hours under the conditions of a heating plate temperature of...

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PUM

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Abstract

The invention discloses freeze-dried siraitia grosvenorii slices and a preparation method thereof and belongs to the technical field of food processing. The freeze-dried fructus siraitiae slices are prepared through processes of selecting, slicing, carrying out fixation, naturally drying by air, pre-freezing, carrying out secondary freezing, deeply freezing and the like. Compared with the prior art, the method has a simple and easily-controlled process, short freezing and drying time, low energy consumption and high production efficiency; a hot water fixation technology is adopted so that the activity of enzymes including polyphenol oxidase and the like in siraitia grosvenorii peels is deactivated; three times of freezing processes are adopted so that moisture in siraitia grosvenorii is volatilized in sequence and the separation of peels and pulp, caused by moisture drying, is avoided; meanwhile, the color and luster, aroma, taste, nutrient components and the like of the siraitia grosvenorii are kept very well.

Description

technical field [0001] The invention belongs to the technical field of food processing, and in particular relates to a method for preparing freeze-dried monk fruit slices, and also relates to freeze-dried monk fruit slices prepared by the method. Background technique [0002] Luo Han Guo, the fruit of perennial vines of Cucurbitaceae. Also known as Lahan Guo, False Bitter Gourd, Light Fruit Wood Softshell Turtle, Jinbuhuan, Luohanbiao, Naked Turtle, it is known as the "fairy fruit". Its leaves are heart-shaped, dioecious, blooming in summer and fruiting in autumn. It is mainly produced in Longjiang Township, Longsheng and Baishou Towns, Yongfu County, Guilin City, Guangxi. Yongfu County and Longsheng County are the hometowns of Luo Han Guo with a long history of cultivation. Among them, Yongfu has planted Luo Han Guo for more than 300 years, and Longsheng County has grown Luo Han Guo. It has a history of more than 200 years. Ninety percent of Luo Han Guo is produced in Yong...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23L19/00A23B7/005A23B7/02A23B7/024
CPCA23B7/0053A23B7/02A23B7/024A23V2002/00A23V2300/10
Inventor 陈素云
Owner 陈素云
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