Polygonatum sibiricum functional liquid beverage and preparation method thereof

Abstract

The invention discloses a polygonatum sibiricum functional liquid beverage and a preparation method thereof, and belongs to the technical field of development of green healthy functional beverage products. The polygonatum sibiricum functional liquid beverage comprises the following raw materials in parts by mass: 30-46 parts of a polygonatum sibiricum extracting solution, 4-10 parts of polygonatum sibiricum steaming water and 50-60 parts of purified water. Functional components of rhizoma polygonati are fully utilized, the process is optimized, so that the content of low-molecular-weight glycans is increased, a novel functional product is developed in the form of a beverage through comprehensive combination of the extracting solution and rhizoma polygonati steaming water, and economic and environmental values are achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of development of green and healthy functional beverage products, and in particular relates to a polygonatum functional liquid beverage and a preparation method thereof. Background Art

[0002] Polygonatum sibiricum is a perennial herb of the genus Polygonatum in the Asparagaceae family. Its rhizome is a traditional precious tonic in my country and is one of the first precious species of "medicine and food" announced by the former Ministry of Health. Polygonatum sibiricum is rich in a variety of bioactive substances, including polysaccharides, steroidal saponins, triterpenes, alkaloids, flavonoids, etc. In addition, Polygonatum sibiricum also has a variety of nutrients, such as non-starch polysaccharides, proteins and amino acids. In recent years, studies have found that there are a large number of low-molecular-weight polysaccharides in raw Polygonatum sibiricum, which have excellent physiological functions such as low caloric value, no dental caries, promoting the proliferation of bifidobacteria, lowering blood sugar, improving serum lipids, and promoting the absorption of trace elements.

[0003] Eating raw rhizomes of Polygonatum sibiricum directly will cause strong irritation to the throat. Therefore, traditional Polygonatum sibiricum products on the market are mainly processed rhizomes (processed Polygonatum sibiricum), that is, products that are repeatedly steamed, stewed, dried, etc. During the steaming process, a large amount of condensed and refluxed steaming process water will be produced. At the same time, steaming leads to the degradation of low molecular weight polysaccharides. The process water is rich in characteristic sugars of Polygonatum sibiricum, mainly monosaccharides and disaccharides, but it is currently lacking in utilization and is directly discharged. Because it contains a lot of organic matter and high COD, the discharge not only wastes resources but also seriously pollutes the environment.

[0004] On the other hand, polygonatum extraction is also a processing method. The existing technology generally achieves the dissolution of the effective ingredients of polygonatum through hot water extraction, microwave-assisted extraction, etc., and mixed extraction is carried out after compatibility with other food resources. However, the goal is mostly to pursue the yield, and less attention is paid to the changes of ingredients in the extraction process, and finally a beverage product is formed (such as the invention patents with publication numbers CN108719694A or CN111671020A).

[0005] In general, the existing technologies have their own characteristics, and their characteristics and shortcomings are as follows:

[0006] (1) Existing water extraction technology for raw Polygonatum sibiricum usually uses high temperature extraction, which will cause the decomposition and destruction of a large number of low molecular weight polysaccharides;

[0007] (2) The existing technologies do not reuse the wastewater from steaming Polygonatum odoratum, resulting in a large loss of Polygonatum odoratum characteristic sugar and waste of resources. Direct discharge of wastewater poses a great threat to environmental pollution.

[0008] (3) In the prior art, some use the water extract of polygonatum sibiricum alone as an effective ingredient, and some use polygonatum sibiricum polysaccharide alone as an effective ingredient, but the water extract of polygonatum sibiricum and the steamed water of polygonatum sibiricum are not used in combination. Summary of the invention

[0009] In view of the above technical problems, the present invention proposes a polygonatum functional liquid beverage and a preparation method thereof. The present invention makes full use of the functional components of polygonatum, optimizes the water extraction process of raw polygonatum to increase the content of low molecular weight polysaccharides, and develops a new functional product in the form of a beverage by combining the extract with the polygonatum steamed water, which has economic and environmental value.

[0010] To achieve the above object, the present invention provides the following technical solutions:

[0011] One of the purposes of the present invention is to provide a polygonatum functional liquid beverage, comprising the following raw materials in parts by weight: 30-46 parts of polygonatum extract, 4-10 parts of polygonatum steamed water and 50-60 parts of purified water.

[0012] Polygonatum contains rich bioactive ingredients, such as Polygonatum polysaccharide, Polygonatum glycoside, etc. These ingredients have good hypoglycemic, hypolipidemic, anti-oxidation, anti-fatigue, anti-aging, immunomodulatory and other physiological functions. Therefore, Polygonatum extract has certain health care effects. As the main raw material of liquid beverages, the nutrients of Polygonatum extract are more easily absorbed by the human body. The various bioactive ingredients contained in the Polygonatum extract can not only play a role alone, but also be supplemented with other nutrients such as vitamins and minerals to exert better health care effects. The Polygonatum extract provided by the present invention has a high content of low molecular weight polysaccharides. Polygonatum steamed water is a raw material matched with it. It is obtained by steaming freshly picked raw Polygonatum, retaining most of the original nutrients and flavor compounds in raw Polygonatum, and is a very natural plant beverage.

[0013] When raw polygonatum is steamed, it will flow through the polygonatum during the condensation process, thus carrying some water-soluble components of polygonatum, such as low molecular weight polysaccharides, monosaccharides, etc., providing more abundant nutrients and flavors for subsequent products, with higher health value and taste quality. On the other hand, raw polygonatum steamed water can also be used as a flavoring agent in the beverage of the present invention due to its natural plant characteristics, which can not only add various flavors, but also play a role in regulating the balance of taste and improving the layered sense of taste through its own nutrients and flavor characteristics. Not only that, the use of raw polygonatum steamed water in conjunction with polygonatum extract can also effectively reduce the calories of the beverage, without the need to add additional sugar, increase the supplementation of various vitamins, minerals, etc., and most importantly, can effectively increase the content of low molecular weight polysaccharides.

[0014] Preferably, the polygonatum functional liquid beverage comprises the following raw materials in parts by mass: 44.4 parts of polygonatum extract, 5.6 parts of polygonatum distilled water and 50 parts of purified water.

[0015] Furthermore, the specific preparation steps of the polygonatum extract include: grinding the raw polygonatum freeze-dried powder to obtain polygonatum powder, adding water, heating and extracting, filtering, centrifuging, and the obtained filtrate is the polygonatum extract.

[0016] The present invention grinds the raw polygonatum freeze-dried powder, adds water, heats and extracts it to obtain the polygonatum extract, and this process is mainly to dissolve the effective components in the polygonatum, such as low molecular weight polysaccharides. In the extraction process, in addition to the effective components, water-soluble nutrients such as vitamins and minerals are also easily destroyed. By adopting the preparation method of the present invention, these nutrients can be better retained, so that the final beverage has richer nutritional value.

[0017] Furthermore, the raw polygonatum freeze-dried powder is ground to pass through a 40-mesh sieve.

[0018] Furthermore, the mass ratio of the polygonatum powder to water is 1:(2-20).

[0019] Furthermore, the heating extraction process is: stirring the mixture of water and polygonatum sibiricum powder at a constant temperature of 40-50° C. for 50-70 minutes and then boiling it for 3 minutes.

[0020] Furthermore, the filtering process is as follows: filtering with a 400-mesh filter cloth while hot, then filtering with an 800-mesh filter cloth, washing the filter residue with hot water and filtering again, and combining the filtrates. Impurities can be effectively removed by filtering with filter cloth and filtering multiple times, so that the extract meets the drinking standard.

[0021] Furthermore, the centrifugal speed is 3000-6000 rpm and the time is 10 minutes. The centrifuge treatment can further remove the raw polygonatum residue.

[0022] Furthermore, the specific preparation steps of the polygonatum steamed water include: placing raw polygonatum in a steamer for heating, steaming on medium heat for 2-10 hours after the water boils, collecting polygonatum steaming wastewater, filtering, evaporating, and concentrating to obtain polygonatum steamed water.

[0023] The second purpose of the present invention is to provide a method for preparing a polygonatum functional liquid beverage, comprising the following steps: weighing raw materials according to mass, mixing the polygonatum extract, polygonatum steamed water and purified water, adding citric acid to adjust the pH to 3.0, standing, filtering, filling and sterilizing to obtain the polygonatum functional liquid beverage.

[0024] The invention mixes the extract, polygonatum steamed water and purified water in a certain proportion, adds citric acid to adjust pH, and finally performs filling and sterilization, so as to obtain a polygonatum functional liquid beverage with good stability.

[0025] Compared with the prior art, the present invention has the following advantages and technical effects:

[0026] (1) By optimizing the water extraction conditions of raw polygonatum and the beverage compounding ratio, the present invention successfully obtained a high-quality polygonatum functional beverage. The beverage is significantly superior to samples under other conditions in terms of taste and smell, presenting a unique and harmonious polygonatum aroma, moderate sweet and sour taste, and no astringency. In terms of taste, the beverage is refreshing and smooth, uniform and transparent, and has no precipitation or flocs. Its low molecular weight polysaccharide content is moderate, which meets the requirements of healthy beverages and has good market application potential.

[0027] (2) Sensory evaluation of beverages with different proportions was conducted, covering four aspects: color, texture, morphology, smell and taste, and the low molecular weight polysaccharide content in the beverages under different water extraction conditions and proportion conditions was determined. The present invention uses sensory evaluation scores and low molecular weight polysaccharide content as comprehensive evaluation indicators, and after systematic analysis, determines the optimal functional beverage formula and process conditions.

[0028] (3) The beverage preparation process involved in the present invention is simple and easy to operate, and is suitable for industrial large-scale production. At the same time, the present invention can effectively utilize steaming wastewater and low molecular weight polysaccharides in raw polygonatum to achieve efficient utilization of resources, which is in line with the modern concept of sustainable development. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0030] Figure 1 This is a real picture of the polygonatum functional liquid beverage prepared in Example 1. DETAILED DESCRIPTION

[0031] Various exemplary embodiments of the present invention will now be described in detail. This detailed description should not be considered as limiting the present invention, but should be understood as a more detailed description of certain aspects, features, and embodiments of the present invention.

[0032] It should be understood that the terms described in the present invention are only for describing special embodiments and are not intended to limit the present invention. In addition, for the numerical range in the present invention, it should be understood that each intermediate value between the upper and lower limits of the scope is also specifically disclosed. Each smaller range between the intermediate value in any stated value or stated range and any other stated value or intermediate value in the described range is also included in the present invention. The upper and lower limits of these smaller ranges can be independently included or excluded in the scope.

[0033] Unless otherwise indicated, all technical and scientific terms used herein have the same meanings as those generally understood by those skilled in the art. Although the present invention describes only preferred methods and materials, any methods and materials similar or equivalent to those described herein may also be used in the implementation or testing of the present invention. All documents mentioned in this specification are incorporated by reference to disclose and describe the methods and / or materials associated with the documents. In the event of a conflict with any incorporated document, the content of this specification shall prevail.

[0034] It will be apparent to those skilled in the art that various modifications and variations may be made to the specific embodiments of the present invention description without departing from the scope or spirit of the present invention. Other embodiments derived from the present invention description will be apparent to those skilled in the art. The present invention description and examples are exemplary only.

[0035] The words “include,” “including,” “have,” “contain,” etc. used in this document are open-ended terms, meaning including but not limited to.

[0036] A polygonatum functional liquid beverage comprises the following raw materials in parts by weight: 30-46 parts of polygonatum extract, 4-10 parts of polygonatum steamed water, and 50-60 parts of purified water. Exemplarily, in the following embodiments of the present invention, the polygonatum functional liquid beverage comprises the following raw materials in parts by weight: 44.4 parts of polygonatum extract, 5.6 parts of polygonatum steamed water, and 50 parts of purified water.

[0037] In the following embodiments of the present invention, the specific preparation steps of the polygonatum extract include: grinding the raw polygonatum freeze-dried powder to obtain polygonatum powder, adding water, heating and extracting, filtering, centrifuging, and the obtained filtrate is the polygonatum extract.

[0038] In the following examples of the present invention, the freeze-dried raw polygonatum powder is ground to pass through a 40-mesh sieve.

[0039] In some embodiments of the present invention, the mass ratio of the polygonatum sibiricum powder to water is 1:(2-20). Exemplarily, in the following embodiments of the present invention, the mass ratio of the polygonatum sibiricum powder to water is 1:20.

[0040] In some embodiments of the present invention, the heating and leaching process is: stirring the mixture of water and polygonatum powder at a constant temperature of 40-50°C for 50-70 minutes and then boiling for 3 minutes. Exemplarily, in the following embodiments of the present invention, the heating and leaching process is: stirring the mixture of water and polygonatum powder at a constant temperature of 45°C for 60 minutes and then boiling for 3 minutes.

[0041] In the following embodiments of the present invention, the filtering process is: filtering with a 400-mesh filter cloth while hot, and then filtering with an 800-mesh filter cloth, washing the filter residue with hot water and filtering again, and combining the filtrates.

[0042] In some embodiments of the present invention, the centrifugal speed is 3000-6000 rpm for 10 minutes. The centrifuge treatment can further remove the raw polygonatum and the precipitate. Exemplarily, in the following embodiments of the present invention, the centrifugal speed is 3600 rpm for 10 minutes.

[0043] In some embodiments of the present invention, the specific preparation steps of the steamed water of polygonatum include: placing raw polygonatum in a steamer for heating, turning to medium heat for steaming for 2-10 hours after the water boils, collecting the waste water of steaming polygonatum, filtering, evaporating, and concentrating to obtain the steamed water of polygonatum. Exemplary, in the following embodiments of the present invention, the specific preparation steps of the steamed water of polygonatum include: placing raw polygonatum in a steamer for heating, turning to medium heat for steaming for 2 hours after the water boils, collecting the waste water of steaming polygonatum, filtering, evaporating, and concentrating to obtain the steamed water of polygonatum. The steps of filtering, evaporation, etc. can all be performed by conventional operations in the art, and the specific operation process is not used as a judgment factor for the creativity of the present invention.

[0044] The preparation method of the polygonatum functional liquid beverage comprises the following steps: weighing raw materials according to mass, mixing the polygonatum extract, polygonatum steamed water and purified water, adding citric acid to adjust pH=3.0, standing, filtering, filling and sterilizing to obtain the polygonatum functional liquid beverage. The standing, filtering, filling and sterilizing steps can all be conventionally performed in the art, and the specific operation process is not used as a factor for judging the creativity of the present invention.

[0045] The "parts" described in the present invention, unless otherwise specified, refer to parts by mass.

[0046] The low molecular weight polysaccharide described in the present invention refers to: polysaccharides with a smaller molecular weight, including oligosaccharides (3-20 polysaccharides). The present invention specifically refers to the sugars with greater than or equal to 3 polysaccharides in the supernatant after the water extract of Polygonatum sibiricum is precipitated with ethanol (the volume fraction of ethanol in the mixed system is 80%).

[0047] The raw materials used in the present invention are all purchased from the market.

[0048] The technical solution of the present invention is further illustrated by the following embodiments.

[0049] Example 1

[0050] A method for preparing a polygonatum functional liquid beverage comprises the following steps:

[0051] (1) Preparation of polygonatum extract: raw polygonatum freeze-dried powder is ground through a 40-mesh sieve to obtain polygonatum powder, water is added in a ratio of 1:20 between polygonatum powder and water, and then heated and extracted at a constant temperature of 45° C. for 60 minutes and then boiled for 3 minutes. The solution is first filtered through a 400-mesh filter cloth while hot, and then filtered through an 800-mesh filter cloth. The filter residue is washed with hot water three times and then filtered again. The filtrate and washing solution are combined, and the obtained extract is centrifuged at 3600 rpm for 10 minutes. The obtained filtrate is the polygonatum extract;

[0052] (2) Preparation of Polygonatum sibiricum steamed water: Place raw Polygonatum sibiricum in a steamer and heat it. After the water boils, turn to medium heat and steam for 2 hours. Collect the Polygonatum sibiricum steamed waste water, filter it, evaporate it, and concentrate it to 200 mL (the same below) to obtain Polygonatum sibiricum steamed water;

[0053] (3) Preparation of polygonatum functional liquid beverage: 44.4 parts of polygonatum extract, 5.6 parts of polygonatum distilled water and 50 parts of purified water were mixed, citric acid was added to adjust the pH to 3.0, the mixture was allowed to stand, filtered, filled and sterilized to obtain polygonatum functional liquid beverage.

[0054] Example 2

[0055] Same as Example 1, except that the extraction temperature is 40° C. and the extraction time is 50 minutes.

[0056] Example 3

[0057] Same as Example 1, except that the extraction temperature is 50° C. and the extraction time is 70 minutes.

[0058] Example 4

[0059] Same as Example 1, except that in the specific preparation steps of the polygonatum steamed water: raw polygonatum is placed in a steamer and heated, and after the water boils, it is steamed over medium heat for 10 hours.

[0060] Comparative Example 1

[0061] The same as Example 1, except that, in the preparation of the polygonatum sibiricum extract in step (1), after heating and extracting at a constant temperature of 45° C. for 60 minutes, the boiling treatment for 3 minutes is no longer performed.

[0062] Comparative Example 2

[0063] The method is the same as Example 1, except that, in step (2), raw polygonatum sibiricum is placed in a steamer and heated, and after the water boils, the steaming is performed over medium heat for 20 hours, and the polygonatum sibiricum steaming wastewater is collected, filtered, evaporated, and concentrated to obtain polygonatum sibiricum steaming water.

[0064] Comparative Examples 3-15

[0065] Same as Example 1, except that the extraction temperature and extraction time in step (1) for preparing the polygonatum extract are different, see Table 3 for details.

[0066] Performance measurement:

[0067] (1) Determination of soluble solids content

[0068] The total soluble solids (TSS) content in beverages was determined using a digital refractometer.

[0069] (2) Determination of low molecular weight polysaccharide content

[0070] Determined by ion chromatography.

[0071] (3) Descriptive sensory evaluation of Polygonatum odoratum beverage

[0072] The sensory evaluation laboratory consists of 10 trained evaluators aged between 20 and 30 years old. The organizational morphology, color, smell and taste of the beverages were evaluated. The evaluation results of each item of each beverage by the 10 personnel were averaged to obtain the final result. The evaluation results of the four aspects of the same beverage by each evaluator were added together and averaged to obtain the overall descriptive evaluation result. The evaluation criteria are shown in Table 1, the measurement results of the Polygonatum odoratum functional liquid beverages prepared in Example 1 and Comparative Examples 1-4 are shown in Table 2, and the measurement results of the low molecular weight polysaccharide content of Comparative Example 5 are shown in Table 3. Figure 1 This is a real picture of the polygonatum functional liquid beverage prepared in Example 1.

[0073] Table 1 Sensory evaluation scoring standard of Polygonatum odoratum beverage

[0074]

[0075]

[0076] Table 2 Basic physical and chemical properties of polygonatum beverage

[0077]

[0078] As can be seen from Table 2, the polygonatum functional liquid beverage prepared in Example 1 has the best taste, is uniform and transparent, has no precipitation or flocs, has a low molecular weight polysaccharide content of about 4.96 mg / mL, and has an overall sensory evaluation score of 87 points; compared with Example 1, the polygonatum functional liquid beverages prepared in Examples 2 and 3 may have changes in extraction conditions that may result in the inability to completely extract low molecular weight polysaccharides, resulting in a reduced content, and the beverage is uniform and transparent as a whole, with a better taste and acceptable; compared with Examples 1 and 4, as the polygonatum steamed water is steamed for a longer time, the low molecular weight polysaccharides therein are destroyed, the nutritional value is reduced, and the polygonatum aroma is not strong enough, and the taste is sweeter; compared with Example 1, Comparative Example 1 lacks the step of boiling for three minutes, which may result in the inability to fully dissolve its low molecular weight polysaccharides.

[0079] Table 3 Low molecular weight polysaccharide content of Polygonatum sibiricum beverage under different extraction conditions

[0080]

[0081] As can be seen from Table 3, the beverage prepared from the polygonatum extract obtained by immersion at 45°C for 60 minutes in Example 1 has the highest content of low molecular weight polysaccharides, indicating that this condition is the best condition for preparing the polygonatum extract.

[0082] Comparative Example 16

[0083] Same as Example 1, except that the water used to steam polygonatum is replaced with purified water.

[0084] The content of low molecular weight polysaccharides in the beverage prepared by this comparative example is 4.05 mg / mL

[0085] Comparative Example 17

[0086] Same as Example 1, except that, step (1) preparation of polygonatum extract: dried polygonatum was crushed, passed through a 100-mesh sieve, irradiated and sterilized, ten times the weight of pure water was added to the fine powder, and boiled for 60 minutes.

[0087] The content of low molecular weight polysaccharides in the beverage prepared by this comparative example was 3.41 mg / mL.

[0088] The above are only preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A polygonatum functional liquid beverage, characterized in that: The invention comprises the following raw materials in parts by weight: 30-46 parts of polygonatum sibiricum extract, 4-10 parts of polygonatum sibiricum steamed water and 50-60 parts of purified water.

2. The polygonatum functional liquid beverage according to claim 1, characterized in that: The invention comprises the following raw materials in parts by weight: 44.4 parts of polygonatum sibiricum extract, 5.6 parts of polygonatum sibiricum steamed water and 50 parts of purified water.

3. The polygonatum functional liquid beverage according to claim 1 or 2, characterized in that: The specific preparation steps of the polygonatum sibiricum extract include: grinding the raw polygonatum sibiricum freeze-dried powder to obtain polygonatum sibiricum powder, adding water, heating and extracting, filtering, centrifuging, and the obtained filtrate is the polygonatum sibiricum extract.

4. The polygonatum functional liquid beverage according to claim 3, characterized in that: The freeze-dried raw polygonatum powder is ground to pass through a 40-mesh sieve.

5. The polygonatum functional liquid beverage according to claim 3, characterized in that: The mass ratio of the polygonatum powder to water is 1:(2-20).

6. The polygonatum functional liquid beverage according to claim 3, characterized in that: The heating extraction process is as follows: a mixture of water and polygonatum sibiricum powder is stirred at a constant temperature of 40-50° C. for 50-70 minutes and then boiled for 3 minutes.

7. The polygonatum functional liquid beverage according to claim 3, characterized in that: The filtering process is as follows: filtering with a 400-mesh filter cloth while hot, and then filtering with an 800-mesh filter cloth, washing the filter residue with hot water and filtering again, and combining the filtrate and the washing liquid.

8. The polygonatum sibiricum functional liquid beverage according to claim 3, characterized in that: The centrifugal speed is 3000-6000 rpm and the time is 10 minutes.

9. The polygonatum functional liquid beverage according to claim 1 or 2, characterized in that: The specific preparation steps of the polygonatum steamed water include: placing raw polygonatum in a steamer for heating, steaming on medium heat for 2-10 hours after the water boils, collecting polygonatum steaming waste water, filtering, evaporating and concentrating to obtain the polygonatum steamed water.

10. A method for preparing a polygonatum functional liquid beverage according to any one of claims 1 to 9, characterized in that: The method comprises the following steps: weighing raw materials according to mass, mixing the polygonatum extract, polygonatum steamed water and purified water, adding citric acid to adjust the pH to 3.0, standing, filtering, filling and sterilizing to obtain a polygonatum functional liquid beverage.

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