Method for preparing natural pine needle antiseptic through water extraction and flocculation technology

A natural preservative and flocculation technology, applied in the field of food additives, can solve the problems of cumbersome operation of water extraction and alcohol precipitation, poor stability of finished products, long consumption time, etc. The effect of high viscosity

Inactive Publication Date: 2016-01-06
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the water extraction and alcohol precipitation method is cumbersome to operate, takes a long time, and the stability of the finished product is poor and the cost is high

Method used

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  • Method for preparing natural pine needle antiseptic through water extraction and flocculation technology
  • Method for preparing natural pine needle antiseptic through water extraction and flocculation technology
  • Method for preparing natural pine needle antiseptic through water extraction and flocculation technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1: the preparation method 1 of pine needle extract

[0028] 1: Take pine needles, rinse, drain, and dry at 45°C.

[0029] 2. Crush the dried pine needles above, take 100g of pine needles, add 1000ml of water, and extract at 70°C for 1h.

[0030] 3 Take the filtrate by filtration, and concentrate under reduced pressure at 60°C to 500ml.

[0031] 4. Add ZTC plant extract clarifier to the 500ml concentrated solution, let it stand for 6 hours, and centrifuge to remove the precipitate.

[0032] 5. Concentrate the flocculated liquid under reduced pressure to a paste, and freeze-dry to obtain 9.4 g of pine needle extract.

[0033] The pine needle extract obtained by the invention is light yellow powder and has good water solubility.

Embodiment 2

[0034] Embodiment 2: the preparation method 2 of pine needle extract

[0035] 1: Take pine needles, rinse, drain, and dry at 45°C.

[0036] 2. Crush the above dried pine needles, take 100g of pine needles, add 500ml of water, and extract at 70°C for 30min.

[0037] 3 Take the filtrate by filtration, and concentrate under reduced pressure at 50°C to 100ml.

[0038] 4. Add ZTC plant extract clarifier to 100ml concentrated solution, let it stand for 6 hours, and centrifuge to remove the precipitate.

[0039] 5. Concentrate the flocculated liquid under reduced pressure to a paste, and freeze-dry to obtain 7.6 g of pine needle extract.

[0040] The pine needle extract obtained by the invention is light yellow powder and has good water solubility.

Embodiment 3

[0041] Embodiment 3: the preparation method 3 of pine needle extract

[0042] 1: Take pine needles, rinse, drain, and dry at 45°C.

[0043] 2. Crush the above-mentioned dried pine needles, take 100g of pine needles, add 1500ml of water, decoct to 100°C for 1.5h to extract.

[0044] 3 Take the filtrate by filtration, and concentrate under reduced pressure at 80°C to 1000ml.

[0045] 4. Add ZTC plant extract clarifier to the 1000ml concentrated solution, let it stand for 6 hours, and centrifuge to remove the precipitate.

[0046] 5. Concentrate the flocculated liquid under reduced pressure to a paste, freeze-dry to obtain 12.3 g of pine needle extract.

[0047] The pine needle extract obtained by the invention is light yellow powder and has good water solubility.

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Abstract

The invention relates to a method for preparing a natural pine needle antiseptic mainly used for fresh keeping of foods. The method comprises the following steps: cleaning pine needle by using clear water, drying, crushing, adding water, carrying out boiling water bath extraction, filtering, taking out the obtained filtrate, carrying out reduced pressure concentration on the filtrate until a certain concentration, adding a flocculation clarificant, standing, and carrying out filtering separation or centrifuging separation to obtain a purified solution. The natural pine needle antiseptic is the purified solution or a pulvis prepared after drying the purified solution. A pine needle extract product obtained in the invention has strong inhibition effects on Gram-positive bacteria and Gram-negative bacteria, has good thermal stability, and has a good antibiosis effect under different pH conditions. Compared with traditional water extraction and alcohol precipitation technologies, the method provided by the invention has the advantages of great reduction of the cost, production cycle shortening, stable quality of the extract solution. Pine needle adopted as a raw material has wide sources and low cost.

Description

technical field [0001] The invention relates to an extraction method for producing a natural preservative by using pine needles as raw materials, belonging to the field of food additives. Background technique [0002] The food industry has become one of the three pillar industries of the national economy, and food is susceptible to microbial infection and corruption during processing, preservation, storage and transportation, which not only makes it lose its nutritional value and waste, but also causes food poisoning and endangers people's health. healthy. At present, the most convenient and economical technical means is to add food preservatives. [0003] At present, benzoic acid, sorbic acid and its salts and parabens are the most widely used synthetic preservatives in food processing, but long-term research has found that the excessive use of these synthetic preservatives There are certain toxic side effects and chronic damage to the human body. For example, Japan has c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23L3/3454
Inventor 宋元达陈晓天张怀渊
Owner JIANGNAN UNIV
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