阅读说明：本技术 一种单味低温真空干燥提取粉及其提取方法 (Single-flavor low-temperature vacuum drying extraction powder and extraction method thereof ) 是由 周景春 吴金昱 于 2021-01-22 设计创作，主要内容包括：本发明公开一种单味低温真空干燥提取粉及其提取方法,属于林产化工技术领域。本发明提供的提取方法包括通过酶法提取人参属药材中的成分,并结合使用截留分子量为250～300kDa的超滤膜过滤和使用截留分子量为100Da的超滤膜浓缩,以及冷冻干燥步骤,不涉及使用有机溶剂,也不涉及高温处理步骤,可以有效保护得到的单味低温真空干燥提取粉中的活性成分,并可以提高其安全性和主要活性成分的含量。(The invention discloses single-flavor low-temperature vacuum drying extraction powder and an extraction method thereof, and belongs to the technical field of forest chemical industry. The extraction method provided by the invention comprises the steps of extracting the components in the ginseng medicinal materials by an enzyme method, filtering by using an ultrafiltration membrane with the molecular weight cutoff of 250-300 kDa, concentrating by using an ultrafiltration membrane with the molecular weight cutoff of 100Da, and freeze-drying, does not involve the use of an organic solvent or a high-temperature treatment step, can effectively protect the active components in the obtained single-flavor low-temperature vacuum drying extraction powder, and can improve the safety and the content of main active components.)

1. A method for extracting single-flavor low-temperature vacuum drying extraction powder is characterized by comprising the following steps:

1) preparing an extracting solution: dissolving cellulase in a phosphate buffer solution with the pH value of 4.0-5.0 to obtain an extracting solution;

2) extraction: extracting components in the ginseng medicinal material by using the extracting solution prepared in the step 1), and carrying out rough filtration to obtain a crude extracting solution of the ginseng medicinal material;

3) and (3) filtering: tangential flow filtering the crude extract of the ginseng medicinal material obtained in the step 2) by using an ultrafiltration membrane with the molecular weight cutoff of 250-300 kDa, and collecting the permeate to obtain extract filtrate of the ginseng medicinal material;

4) concentration: concentrating the Panax extract filtrate with a filter membrane with molecular weight cutoff of 100Da to obtain Panax extract concentrated solution;

5) freeze-drying the ginseng medicinal material extract concentrated solution obtained in the step 4) to obtain single-ingredient low-temperature vacuum drying extraction powder.

2. The extraction method according to claim 1, wherein before the step 5), 0.5-2% of antioxidant, 1-3% of emulsifier and 3-5% of disintegrant are further added into the ginseng medicinal material extract concentrated solution to obtain a blend; freeze drying the blend to obtain a single flavor low temperature vacuum dried extract powder.

3. The extraction process according to claim 2, wherein the antioxidant is selected from one or more of ascorbic acid and its sodium salt;

the emulsifier is one or more selected from polysorbate-80, sorbitan fatty acid, pluronic F-68, lecithin and soybean lecithin;

the disintegrant is selected from one or more of sodium carboxymethyl starch, sodium starch glycolate, pregelatinized starch, modified starch, hydroxypropyl starch, and corn starch.

4. The extraction method according to any one of claims 1 to 3, wherein the cellulase in step 1) has a molecular weight of more than 300kDa and an activity of more than or equal to 1 ten thousand U/g; the mass volume concentration of the cellulase in the extracting solution is 0.01-0.05 g/100 ml.

5. The extraction method according to any one of claims 1 to 4, wherein the Panax species in step 2) is any one selected from the group consisting of Panax ginseng, Panax notoginseng, and Panax quinquefolium.

6. The extraction method according to any one of claims 1 to 5, wherein step 2) comprises in particular the following operations:

21) sterilizing the Panax medicinal materials, drying, and crushing to 100-150 meshes to obtain Panax medicinal material powder;

22) extracting the components in the ginseng medicinal material powder by using the extracting solution at the temperature of 40-50 ℃, wherein the extraction time is 2-3 hours; wherein the mass volume ratio of the ginseng medicinal material powder to the extracting solution is 5-10 g/100 ml;

23) and (3) coarse-filtering by using a 200-300-mesh sieve to obtain the crude extract of the ginseng medicinal material.

7. The extraction method according to any one of claims 1 to 6, characterized in that step 3) comprises in particular the following operations:

31) performing tangential flow filtration on the crude extract of the ginseng medicinal material by an ultrafiltration membrane package system, wherein the inlet pressure of the ultrafiltration membrane package system is less than or equal to 0.1MPa, and the transmembrane pressure difference is less than or equal to 0.1 MPa; meanwhile, a phosphate buffer solution with the pH value of 7.0-7.2 is used for washing and filtering, and the flow rate is 3-5L/min;

32) and ending the elution and filtration when the volume of the permeation solution is 5-10 times of the volume of the crude extract of the ginseng medicinal material, and collecting all the permeation solution to obtain extract filtrate of the ginseng medicinal material.

8. The extraction method according to any one of claims 1 to 7, wherein the step 4) is to concentrate the ginseng extract filtrate 10 to 50 times through a filter membrane with a molecular weight cutoff of 100 Da.

9. The extraction process according to any one of claims 1 to 8, characterized in that the freeze-drying in step 5) comprises in particular the following operations:

51) cooling the freezing chamber for 1 hr to-20 deg.C, and pre-freezing for 1 hr;

52) after the heat release is finished, cooling to-30 ℃ within 1 hour, then cooling to-40 ℃ within 1 hour, and keeping the pressure of a freezing chamber below 10 Pa for 1 hour for freezing;

53) heating the temperature of the freezing chamber to-4 ℃, maintaining the vacuum below 10 Pa, and carrying out heat preservation for 6-8 hours for early-stage sublimation;

54) adjusting the vacuum degree to 50 Pa, and carrying out later sublimation at the temperature of minus 4 ℃ for 8-10 hours;

55) after sublimation, adjusting the temperature to 25-30 ℃, and resolving until the vacuum degree is 25 Pa until the solution is completely dried.

10. A single flavor low temperature vacuum dried extract powder obtained by the extraction method of any one of claims 1 to 9.

Technical Field

The invention belongs to the technical field of forest chemical industry, and particularly relates to single-flavor low-temperature vacuum drying extraction powder and an extraction method thereof, in particular to single-flavor low-temperature vacuum drying extraction powder taking ginseng medicinal material extracts as main active ingredients and an extraction method thereof.

Background

The single-ingredient extraction powder (granules) is a traditional Chinese medicine product which is prepared by taking a single traditional Chinese medicine as a main raw material and carrying out extraction, concentration, separation, drying and the like by a modern pharmaceutical technology, has basically consistent active ingredients, properties and tastes, channel tropism, main treatment, efficacy and traditional Chinese medicine decoction liquid medicine and the like, can ensure the characteristics of traditional monarch, minister, assistant, guide and dialectical treatment and flexible addition and subtraction of the traditional Chinese medicine, and is superior to the traditional Chinese patent medicine; the trouble of traditional decoction of the patient is avoided, and meanwhile, the medicine can be flexibly taken with one medicine, so that the medicine is sanitary and effective; and has the advantages of convenient carrying and storage, easy modulation, suitability for industrial production and the like; therefore, it is of great concern in the development of traditional Chinese medicine.

The Panax medicinal material is a perennial herb of Araliaceae, and comprises traditional famous and precious traditional Chinese medicines such as ginseng, pseudo-ginseng, American ginseng and the like, which have been used as the medicinal basis for thousands of years. The ginseng contains saponin (molecular weight is about 1000 Da), polysaccharide (including monosaccharide, oligosaccharide and polysaccharide, the polysaccharide is composed of ginseng starch and ginseng pectin, the pharmacological active part is mainly ginseng pectin, the molecular weight of ginseng polysaccharide is about 10 kDa-150 kDa), volatile oil, protein/polypeptide (molecular weight is about 5 kDa-80 kDa), amino acid and other components, wherein the saponin is the most main active component. The clinical research results at present prove that the ginseng medicinal materials have various biological activities of improving microcirculation in organisms, protecting cardiac function, improving the anti-hypoxia capacity of tissues, resisting cancer, tumors, oxidation, aging, radiation and fatigue and the like, so that the single Chinese medicinal extraction powder taking the ginseng medicinal material extract as the main component has important significance for single use or combined use with other medicaments.

At present, the ginseng medicinal material extract is obtained by the following methods: decocting, warm soaking, water extraction and alcohol precipitation, microwave extraction, ultrasonic extraction, etc. On one hand, the methods have the problems of low extraction efficiency, low content of active ingredients (saponin, ginseng polysaccharide and the like) and the like; on the other hand, the temperature required by the decocting method is higher, which may damage the active ingredients in the ginseng extract; on the other hand, most methods adopt organic solvents (such as ethanol) or combine macroporous resin, the organic solvents can affect the safety of subsequent single-taste extracted powder, and the resin is difficult to resolve, the regeneration process is complicated, and the cost is high.

Disclosure of Invention

In view of one or more of the problems of the prior art, one aspect of the present invention provides a method for extracting a single flavor low temperature vacuum dried extract powder, comprising the steps of:

1) preparing an extracting solution: dissolving cellulase in a phosphate buffer solution with the pH value of 4.0-5.0 to obtain an extracting solution;

2) extraction: extracting components in the ginseng medicinal material by using the extracting solution prepared in the step 1), and carrying out rough filtration to obtain a crude extracting solution of the ginseng medicinal material;

3) and (3) filtering: tangential flow filtering the crude extract of the ginseng medicinal material obtained in the step 2) by using an ultrafiltration membrane with the molecular weight cutoff of 250-300 kDa, and collecting the permeate to obtain extract filtrate of the ginseng medicinal material;

4) concentration: concentrating the Panax extract filtrate with a filter membrane with molecular weight cutoff of 100Da to obtain Panax extract concentrated solution;

5) freeze-drying the ginseng medicinal material extract concentrated solution obtained in the step 4) to obtain single-ingredient low-temperature vacuum drying extraction powder.

In the method, before the step 5), 0.5-2% of antioxidant, 1-3% of emulsifier and 3-5% of disintegrant are added into the ginseng medicinal material extract concentrated solution to obtain a blend; freeze drying the blend to obtain a single flavor low temperature vacuum dried extract powder.

In the above method, the antioxidant is selected from one or more of ascorbic acid and sodium salt thereof; the emulsifier is one or more selected from polysorbate-80, sorbitan fatty acid, pluronic F-68, lecithin and soybean lecithin; the disintegrant is selected from one or more of sodium carboxymethyl starch, sodium starch glycolate, pregelatinized starch, modified starch, hydroxypropyl starch, and corn starch.

In the method, the cellulase in the step 1) has a molecular weight of more than 300kDa and an activity of more than or equal to 1 ten thousand U/g; the mass volume concentration of the cellulase in the extracting solution is 0.01-0.05 g/100 ml.

In the above method, the ginseng genus medicinal material in the step 2) is any one selected from ginseng, notoginseng and panax quinquefolium.

In the above method, step 2) specifically includes the following operations:

21) sterilizing the Panax medicinal materials, drying, and crushing to 100-150 meshes to obtain Panax medicinal material powder;

22) extracting the components in the ginseng medicinal material powder by using the extracting solution at the temperature of 40-50 ℃, wherein the extraction time is 2-3 hours; wherein the mass volume ratio of the ginseng medicinal material powder to the extracting solution is 5-10 g/100 ml;

23) and (3) coarse-filtering by using a 200-300-mesh sieve to obtain the crude extract of the ginseng medicinal material.

In the above method, step 3) specifically includes the following operations:

31) performing tangential flow filtration on the crude extract of the ginseng medicinal material by an ultrafiltration membrane package system, wherein the inlet pressure of the ultrafiltration membrane package system is less than or equal to 0.1MPa, and the transmembrane pressure difference is less than or equal to 0.1 MPa; meanwhile, a phosphate buffer solution with the pH value of 7.0-7.2 is used for washing and filtering, and the flow rate is 3-5L/min;

32) and ending the elution and filtration when the volume of the permeation solution is 5-10 times of the volume of the crude extract of the ginseng medicinal material, and collecting all the permeation solution to obtain extract filtrate of the ginseng medicinal material.

In the method, the step 4) is to concentrate the ginseng extract filtrate by 10-50 times through a filter membrane with the molecular weight cutoff of 100 Da.

In the above method, the freeze-drying in step 5) specifically includes the following operations:

51) cooling the freezing chamber for 1 hr to-20 deg.C, and pre-freezing for 1 hr;

52) after the heat release is finished, cooling to-30 ℃ within 1 hour, then cooling to-40 ℃ within 1 hour, and keeping the pressure of a freezing chamber below 10 Pa for 1 hour for freezing;

53) heating the temperature of the freezing chamber to-4 ℃, maintaining the vacuum below 10 Pa, and carrying out heat preservation for 6-8 hours for early-stage sublimation;

54) adjusting the vacuum degree to 50 Pa, and carrying out later sublimation at the temperature of minus 4 ℃ for 8-10 hours;

55) after sublimation, adjusting the temperature to 25-30 ℃, and resolving until the vacuum degree is 25 Pa until the solution is completely dried.

The single-flavor low-temperature vacuum drying extraction powder obtained by the extraction method also belongs to the content of the invention.

The extraction method of the single-ingredient low-temperature vacuum drying extraction powder based on the technical scheme comprises the steps of extracting the components in the ginseng medicinal materials by an enzyme method; filtering and extracting a crude extract of the ginseng medicinal material by using an ultrafiltration membrane with the molecular weight cutoff of 250-300 kDa, concentrating by using an ultrafiltration membrane with the molecular weight cutoff of 100Da to obtain a concentrated solution of the ginseng medicinal material extract, and drying by using a freeze drying method to obtain single-ingredient low-temperature vacuum drying extract powder. The cellulase used in the enzymatic extraction of the ingredients of the ginseng medicinal materials can effectively destroy cell walls, so that more cell contents are dissociated and enter the extracting solution, the extraction rate of the ingredients of the ginseng medicinal materials is obviously improved, and the use of an organic solvent is avoided; on the other hand, ginseng does not contain components that can be degraded by cellulase, so that the actual efficacy and the taste of the final extract powder product are not affected. Ultrafiltration membranes with different molecular weight cut-off are used for filtering and concentrating, cellulase molecules with larger molecular weight in the extracting solution can be removed in the filtering process, and main components in ginseng medicinal materials are enriched; in the concentration process, inorganic salts (such as phosphate) and other small molecular substances in the extracting solution can be removed, most of the components of saponin, polysaccharide, protein/polypeptide, amino acid and the like from the ginseng medicinal material are reserved, and the step can avoid using macroporous resin and the like which are difficult to regenerate and fussy; on the other hand, tangential flow is used in the filtering process, and meanwhile, the phosphate solution is used for washing rate, so that the phenomenon that saponin in the extracting solution is easy to aggregate into vesicles or micelles due to the characteristics of the surfactant to block the saponin from passing through an ultrafiltration membrane can be effectively avoided, the content and the extraction rate of main components (such as saponin and polysaccharide) in the permeate are remarkably improved, and the content of effective active components in the prepared extract powder is improved. The method provided by the invention does not involve high-temperature operation in the steps of extraction, filtration, concentration, drying and the like, so that the active ingredients in the ginseng medicinal materials can be effectively protected. The single-ingredient low-temperature vacuum drying extraction powder obtained by freeze drying retains the main components in the ginseng medicinal material extract to the maximum extent, can be stably stored for a long time, and can be added with pharmaceutically acceptable auxiliary materials, such as an antioxidant, an emulsifier and a disintegrant, so that the appearance, the stability and the dissolution property of the extraction powder can be further improved. The obtained extraction powder is fluffy powder, is easy to redissolve and is clear after redissolution, and a single traditional Chinese medicine powder product of ginseng medicinal materials is provided.

Detailed Description

The invention will be further illustrated with reference to the following specific examples. It should be understood that the specific examples are intended to be illustrative of the invention and are not intended to limit the scope of the invention.

The various materials or reagents described in the examples are obtained solely for the purpose of providing a laboratory access to achieve the specific disclosure, and should not be construed as limiting the sources of the materials or reagents of the invention. In fact, the sources of the materials or reagents used are wide and any material or reagent that is accessible without violating laws and ethics may be substituted as indicated in the examples.

Example 1:

1) preparing an extracting solution: adding cellulase (purchased from national medicine group chemical reagent limited, the activity is more than or equal to 1 ten thousand U/g, the molecular weight is more than 300kDa (dalton)) into an aseptic phosphate buffer solution (0.2 mol/L sodium dihydrogen phosphate solution is taken and the pH value is adjusted to 5.0 by sodium hydroxide solution), so that the mass volume content of the cellulase is 0.02g/100ml, and preparing to obtain an extracting solution;

2) extraction: slicing Ginseng radix main root (three years old) and performing wet heat sterilization (121 deg.C, 40 min), oven drying, pulverizing and sieving with 100 mesh sieve to obtain Ginseng radix main root powder; adding 500g of ginseng main root powder into 10L of the extracting solution prepared in the step 1), extracting for 3 hours at the temperature of 45 ℃, and carrying out rough filtration by using a 200-mesh sieve to obtain a ginseng main root crude extracting solution; in the step, cell components in the ginseng main root can be dissolved into the extracting solution as much as possible by using the extracting solution containing cellulase, and most of impurities with larger particles are removed by coarse filtration through a 200-mesh screen;

3) and (3) filtering: performing tangential flow filtration on the crude extract of the main roots of the ginseng obtained by the extraction in the step 2) by using an ultrafiltration membrane package system (with the molecular weight cutoff of 300kDa) under the aseptic condition, wherein the inlet pressure of the ultrafiltration membrane package system is 0.1MPa, and the transmembrane pressure difference is 0.08 MPa; meanwhile, a phosphate buffer solution with the pH value of 7.2 is used for washing and filtering, and the flow rate is 4L/min; terminating the elution filtration when the volume of the permeation liquid of the ultrafiltration membrane package system is 10 times of the volume of the crude extract of the main roots of the ginseng, and collecting all the permeation liquid to obtain extract filtrate of the main roots of the ginseng; the filtering step can completely remove cellulase with molecular weight of more than 300kDa and other impurities in the extractive solution, and enrich main components in Ginseng radix main root;

4) concentration: under the aseptic condition, selecting an ultrafiltration membrane with the molecular weight cutoff of 100Da to concentrate the filtrate of the ginseng main root extract by 50 times to obtain the concentrated solution of the ginseng main root extract; the concentration step can effectively remove inorganic ions such as phosphate radical and the like in the filtrate of the ginseng main root extract, and concentrate the inorganic ions, thereby improving the efficiency of the subsequent freeze drying step; the ultrafiltration membrane with molecular weight cutoff of 100Da may cause components (such as glycine) with molecular weight lower than 100Da in the filtrate of the ginseng main root extract to permeate, but the glycine content in the filtrate is extremely low, and the concentrated solution can still basically retain all components in the ginseng main root extract;

5) freeze-drying the concentrated solution of the main root extract of the ginseng obtained in the step 4) under aseptic conditions to obtain single-flavor low-temperature vacuum-dried extract powder, wherein the freeze-drying is specifically carried out by:

51) cooling the freezing chamber for 1 hr to-20 deg.C, and pre-freezing for 1 hr;

52) after the heat release is finished, cooling to-30 ℃ within 1 hour, then cooling to-40 ℃ within 1 hour, and keeping the pressure of a freezing chamber below 10 Pa for 1 hour for freezing;

53) heating the freezing chamber to-4 deg.C, maintaining the vacuum at below 10 Pa, and keeping the temperature for 8 hr for sublimation;

54) adjusting the vacuum degree to 50 Pa, and keeping the temperature at-4 ℃ for 10 hours for later sublimation;

55) after sublimation, adjusting the temperature to 25-30 ℃, and resolving until the vacuum degree is 25 Pa until the solution is completely dried.

Measuring the content of polysaccharide in the single-taste low-temperature vacuum drying extraction powder by using a phenol-sulfuric acid colorimetric method (with the detection wavelength of 490nm), and measuring the content of total saponin in the single-taste low-temperature vacuum drying extraction powder by using a vanillin-sulfuric acid colorimetric method (with the detection wavelength of 544 nm).

Through determination, 126.4g of single-flavor low-temperature vacuum drying extraction powder (ginseng) is obtained in the embodiment, is white (light yellow) fluffy powder, has the water content of 1.1%, is easy to redissolve and is clear after redissolution, wherein the content of total saponins is 9.1g, and the extraction rate is about 45%; the total polysaccharide content was 104.6g, and the extraction yield was about 50%.

Example 2:

this example is the same as example 1 except that in example 2, 5g of ascorbic acid, 10g of polysorbate-80 and 20g of sodium carboxymethyl starch are further added to the ginseng radix main root extract concentrate before the freeze-drying step, and a blend is obtained after uniform mixing; the blend was freeze-dried according to the freeze-drying method of example 1 to obtain a single low-temperature vacuum-dried extract powder.

According to the determination, 163.8g of single-flavor low-temperature vacuum drying extraction powder is obtained in the example, the powder is white fluffy powder, the water content is 0.9%, the powder is easy to redissolve and is clear after redissolution, the content of the total saponins is 8.5g, and the content of the total polysaccharides is 106.9 g.

Example 3:

1) preparing an extracting solution: adding cellulase (purchased from national medicine group chemical reagent limited, with activity more than or equal to 1 ten thousand U/g and molecular weight more than 300kDa) into sterile phosphate buffer solution with pH value of 4.5 to make the mass volume content of cellulase be 0.05g/100ml, and preparing to obtain extractive solution;

2) extraction: slicing radix Notoginseng (three years old) and performing wet heat sterilization (121 deg.C, 40 min), oven drying, pulverizing, and sieving with 100 mesh sieve to obtain radix Notoginseng powder; adding 500g of radix notoginseng taproot powder into 5L of the extracting solution prepared in the step 1), extracting for 3 hours at the temperature of 45 ℃, and carrying out rough filtration by using a 300-mesh sieve to obtain a radix notoginseng taproot crude extracting solution;

3) and (3) filtering: performing tangential flow filtration on the panax notoginseng main root crude extract obtained in the step 2) by using an ultrafiltration membrane package system (with molecular weight cutoff of 300kDa) under aseptic conditions, wherein the inlet pressure of the ultrafiltration membrane package system is 0.1MPa, and the transmembrane pressure difference is 0.08 MPa; meanwhile, a phosphate buffer solution with the pH value of 7.2 is used for washing and filtering, and the flow rate is 3L/min; stopping the elution and filtration when the volume of the permeate of the ultrafiltration membrane package system is 5 times of the volume of the crude extract of the panax notoginseng roots, and collecting all the permeate to obtain the filtrate of the panax notoginseng root extract;

4) concentration: concentrating the filtrate of Notoginseng radix main root extract by 10 times with ultrafiltration membrane with molecular weight cutoff of 100Da under aseptic condition to obtain Notoginseng radix main root extract concentrated solution;

5) the obtained panax notoginseng taproot extract concentrate was freeze-dried according to the freeze-drying procedure of example 1 under aseptic conditions to obtain single low-temperature vacuum-dried extract powder.

Through determination, 107.5g of single-flavor low-temperature vacuum drying extraction powder (pseudo-ginseng) is obtained in the embodiment, is white (yellowish) fluffy powder, has the water content of 1.3%, is easy to redissolve and is clear after redissolution, wherein the content of the total saponins is 28.3g, and the content of the total polysaccharides is 65.2 g.

Example 4:

1) preparing an extracting solution: adding cellulase (purchased from national medicine group chemical reagent limited, with activity more than or equal to 1 ten thousand U/g and molecular weight more than 300kDa) into sterile phosphate buffer solution with pH value of 5.0 to make the mass volume content of cellulase be 0.02g/100ml, and preparing to obtain extractive solution;

2) extraction: slicing radix Panacis Quinquefolii (three-year-old) and performing wet heat sterilization (121 deg.C, 40 min), oven drying, pulverizing, and sieving with 100 mesh sieve to obtain radix Panacis Quinquefolii powder; adding 500g of American ginseng main root powder into 8L of the extracting solution prepared in the step 1), extracting for 3 hours at the temperature of 45 ℃, and carrying out rough filtration by using a 200-mesh sieve to obtain a crude extracting solution of American ginseng main root;

3) and (3) filtering: performing tangential flow filtration on the crude extract of the main root of American ginseng obtained by extraction in the step 2) by using an ultrafiltration membrane package system (with molecular weight cutoff of 300kDa) under the aseptic condition, wherein the inlet pressure of the ultrafiltration membrane package system is 0.1MPa, and the transmembrane pressure difference is 0.08 MPa; meanwhile, a phosphate buffer solution with the pH value of 7.2 is used for washing and filtering, and the flow rate is 3L/min; terminating the elution and filtration when the volume of the permeate of the ultrafiltration membrane package system is 5 times of the volume of the crude extract of the American ginseng main roots, and collecting all the permeate to obtain the extract filtrate of the American ginseng main roots;

4) concentration: concentrating the filtrate of the American ginseng main root extract by 20 times by using an ultrafiltration membrane with the molecular weight cutoff of 100Da under the aseptic condition to obtain an American ginseng main root extract concentrated solution;

5) the obtained American ginseng main root extract concentrate was freeze-dried according to the freeze-drying procedure of example 1 under aseptic conditions to obtain single low-temperature vacuum-dried extract powder.

According to the determination, 164.4g of single-flavor low-temperature vacuum drying extraction powder (American ginseng) obtained in the embodiment is white (light yellow) fluffy powder, the water content is 1.1%, and the powder is easily redissolved and is clear after redissolution, wherein the content of the total saponins is 14.3g, and the content of the total polysaccharides is 142.1 g.

Comparative example 1:

comparative example 1 the same procedure as in example 1 was followed except that comparative example 1 did not use a phosphate buffer solution having a pH of 7.2 for the washing filtration in the tangential flow filtration using an ultrafiltration membrane filtration system; after the tangential flow filtration is finished, an ultrafiltration membrane with the molecular weight cutoff of 100Da is selected to concentrate the filtrate by 5 times to obtain a concentrated solution of the ginseng main root extract; then freeze-drying to obtain single-taste low-temperature vacuum drying extraction powder.

According to the measurement, 87.5g of single-flavor low-temperature vacuum drying extraction powder is obtained in the comparative example 1, the powder is white (light yellow) fluffy powder, the water content is 1.3%, the powder is easy to redissolve and is clear after redissolution, the content of total saponins is 3.4g, and the extraction rate is about 17%; the total polysaccharide content was 79.1g, and the extraction yield was about 38%.

Comparative example 2:

(1) slicing Ginseng radix main root (three years old) and performing wet heat sterilization (121 deg.C, 40 min), oven drying, pulverizing and sieving with 100 mesh sieve to obtain Ginseng radix main root powder; adding 500g of ginseng main root powder into sterile deionized water according to the proportion of 1:10(g/ml), soaking overnight, heating to 100 ℃, extracting for 2 hours for 3 times, and combining supernate to obtain ginseng main root extracting solution;

(2) concentrating the main ginseng root extracting solution obtained in the step (1) to a relative density of about 1.1, cooling, precipitating with 75% ethanol, collecting supernatant, removing ethanol under reduced pressure, and drying in a vacuum drying oven to obtain a main ginseng root crude extract;

(3) putting the crude extract of the main root of the ginseng into a vacuum drying oven at 40 ℃ for hot transformation for 72 hours, redissolving the crude extract of the main root of the ginseng after the hot transformation by using deionized water, adding pretreated D101 type macroporous resin, eluting by using water, eluting by using 10% ethanol until the extract is colorless, collecting the eluent, removing the ethanol by reducing the pressure, and drying in the vacuum drying oven to obtain the powder of the extract of the main root of the ginseng.

It was determined that in this comparative example 2, 74.5g total ginseng radix extract powder was obtained as white (yellowish) powder with lumps, a water content of 2.2%, and was easily and clearly redissolved, wherein the total saponin content was 5.2g and the extraction rate was about 26%; the total polysaccharide content was 58.5g, and the extraction yield was about 30%.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.