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CN102219866A - Method for extracting and separating ganoderma lucidum polysaccharide from ganoderma lucidum sporocarp - Google Patents

Method for extracting and separating ganoderma lucidum polysaccharide from ganoderma lucidum sporocarp Download PDF

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CN102219866A
CN102219866A CN 201110161167 CN201110161167A CN102219866A CN 102219866 A CN102219866 A CN 102219866A CN 201110161167 CN201110161167 CN 201110161167 CN 201110161167 A CN201110161167 A CN 201110161167A CN 102219866 A CN102219866 A CN 102219866A
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enzymolysis
polysaccharide
prozyme
ganoderma sporophore
ganoderma lucidum
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CN102219866B (en
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邵平
姜慧燕
林炳谊
孙培龙
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Zhejiang Johncan Biotechnology Co ltd
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Zhejiang University of Technology ZJUT
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Abstract

The invention discloses a method for extracting and separating ganoderma lucidum polysaccharide from ganoderma lucidum sporocarp. The method comprises the steps of carrying out enzymolysis and extraction with complex enzyme on the ganoderma lucidum sporocarp to obtain enzymolysis solution, concentrating and separating the enzymolysis solution through a tangential flow filtering membrane to obtain ultrafiltration retention solution, carrying out elution, separation and purification on the ultrafiltration retention solution with purified water through radial flow chromatograph to obtain polysaccharide eluent, and conducting reduced pressure concentration and drying on the polysaccharide eluent to obtain ganoderma lucidum polysaccharide, wherein the papain and and cellulose are mixed in a weight ratio of 1:2-4:1 to form complex enzyme. The invention builds a set of polysaccharide production process of ganoderma lucidum sporocarp from raw materials to products, the process is environment-friendly, fast and efficient and suitable for large-scale production and the process cost for refining ganoderma lucidum polysaccharide can be greatly reduced.

Description

A kind of from Ganoderma sporophore the method for extraction separation ganoderan
Technical field
The present invention relates to a kind of from Ganoderma sporophore the method for extraction separation ganoderan.
Background technology
Modern pharmacology and clinical practice confirm that ganoderan is that glossy ganoderma is strengthened the body resistance to consolidate the constitution, strengthening by means of tonics, the major ingredient of promoting longevity.Ganoderan has characteristics such as the non-special resistance of stimulation of host, immune specific reaction and inhibition transplantation tumor physiologically active, energy enhance immunity power, and hypoxia-bearing capability, the market requirement is increasing.
Traditional ganoderan extracting method is: Ganoderma sporophore pulverizing-water is carried/soda acid extraction-alcohol precipitation-oven dry, it is easy to scale operation, but the polysaccharide impurity that obtains is many, active constituent content is low, technology content is very low, though especially the soda acid extraction method can improve extraction yield, high and destructible polysaccharide structures also can cause environmental pollution simultaneously to equipment requirements; The decoloring method of ganoderan is based on charcoal absorption and oxidative decoloration, but these two kinds of method polysaccharide loss rates are bigger; Remove ganoderma lucidum crude polysaccharide protein and use the Savag method mostly, and this method is not only used a large amount of organic solvents, have big toxicity, and complicated operation, cost is higher, is not suitable for mass-producing.
For the modern biotechnology product, separation is the basic fundamental link during Bio-engineering Products are produced, and separation costs can account for 70%~90% of product total cost.In the separation and purification link of ganoderan, adopt ion exchange resin to handle ganoderma lucidum crude polysaccharide and can carry out effective separation and purification, but, in the mass-producing amplification is produced, have bigger difficulty because ion column is an axial columns.Radial flow chromatogram method (Radial Flow Chromatography, RFC) be a kind of novel chromatographic separation analytical technology that grows up over past ten years, compare with axial chromatogram, have that working pressure is low, flow velocity is high, linear amplification reaches outstanding advantages such as treatment capacity is big easily.
Summary of the invention
The method that the purpose of this invention is to provide a kind of separation and purification ganoderma lucidum fruitbody polysaccharide, it has environmental protection, efficient, the advantage that is easy to large-scale production.The present invention has not only kept the activity of ganoderan to greatest extent in preparation process, do not use any organic solvent, and can realize ganoderan scale preparation fast and efficiently.
The technical solution used in the present invention is:
A kind of from Ganoderma sporophore the method for extraction separation ganoderan, described method is: the Ganoderma sporophore powder carries out enzymolysis and extraction with prozyme and gets enzymolysis solution, and the gained enzymolysis solution separates to such an extent that ultrafiltration trapped fluid, gained ultrafiltration trapped fluid get polysaccharide elutriant, gained polysaccharide elutriant concentrating under reduced pressure, drying by radial flow chromatogram with the separation and purification of pure water wash-out and make ganoderan through the tangential flow filtration membrane concentration; Described prozyme is papoid and 1: 2~4: 1 mixing of cellulase mass ratio.
Described Ganoderma sporophore powder carries out enzymolysis and extraction with prozyme and can carry out as follows: the Ganoderma sporophore of 100 eye mesh screens is crossed in the broken back of selection, get the Ganoderma sporophore powder, adding quality is in the water of 10~30 times in Ganoderma sporophore powder, adjust pH is 4.5-7, add prozyme, carry out enzymolysis and extraction under stirring, enzymatic hydrolysis condition is: hydrolysis temperature is 40 ℃-65 ℃, enzymolysis time is 1h-3h, the add-on of prozyme is the 1%-5% of Ganoderma sporophore powder quality, and described prozyme is papoid and 1: 2~4: 1 mixing of cellulase mass ratio; Enzymolysis and extraction finishes the back centrifugation, gets supernatant liquor and promptly gets enzymolysis solution; The enzyme of described papoid unit alive is 80-100 ten thousand U/g, and the enzyme of described cellulase unit alive is 5-10 ten thousand U/g.
Described centrifugation under the 4000rpm rotating speed centrifugal 10~15 minutes usually.
Described adjust pH is used basic solution usually, as sodium hydroxide solution, saturated aqua calcis etc.
Papoid in the used prozyme or cellulase all can adopt commercial commercial enzyme, and the effect of papoid is the hydrolysis foreign protein, and the effect of cellulase is the dissociated cell wall, is convenient to the polysaccharide stripping.
Described enzymolysis solution carries out as follows through the separation of tangential flow filtration membrane concentration: enzymolysis solution enters the tangential flow filtration system, selecting molecular weight cut-off for use is the daltonian ultra-filtration membranes of 100,000 dalton-1,000,000, pressure is 0~30psi, room temperature, the volumetric flow rate of enzymolysis solution is 125-700mL/min, cycles of concentration is 10-20 times, gets the ultrafiltration trapped fluid.By tangential flow filtration, can remove a large amount of protein in the enzymolysis solution, remove the free pigment in the enzymolysis solution simultaneously.
Described tangential flow filtration system is the filtering system of the separation and purification macromole biologically active substance used always, and different with the conventional filtration mode, the flow direction of liquid to be filtered is tangentially parallel with filter membrane, is a kind of filter operation mode that has been widely adopted in the pharmaceutical technology.The all commercially available acquisition of employed system, known its using method of those skilled in the art.The tangential flow filtration system that adopts in the embodiment of the invention is Congent M, U.S. Millipore Corp..
Described ultrafiltration trapped fluid carries out with the separation and purification of pure water wash-out as follows by radial flow chromatogram: the ultrafiltration trapped fluid adds in the radial flow chromatographic column, adopt weak base anion-exchange resin to fill radial flow chromatographic column, use the pure water wash-out, separation and purification gets the polysaccharide elutriant.The ultrafiltration trapped fluid removes most protein and pigment after by radial flow chromatogram.
Described radial flow chromatogram and patent application 200810163568 A kind of radial flow chromatogram to remove Method of protein in the Crude polysaccharidesWhat adopt is identical method, the radial flow chromatogram separation method adopts the radial flow particular design, compare with traditional axial chromatogram, this method has that flow velocity height, working pressure are low, linear amplification reaches outstanding advantages such as quantity of sample handling is big easily, employed radial flow chromatographic column can be by commercially available, and using method also is known.
Further, the method for the invention is preferably carried out according to the following steps:
(1) Ganoderma sporophore of 100 eye mesh screens is crossed in the broken back of selection, get the Ganoderma sporophore powder, adding quality is in the water of 10~30 times in Ganoderma sporophore powder, adjust pH is 4.5-7, adds prozyme, carries out enzymolysis and extraction under stirring, enzymatic hydrolysis condition is: hydrolysis temperature is 40 ℃-65 ℃, enzymolysis time is 1h-3h, and the add-on of prozyme is the 1%-5% of Ganoderma sporophore powder quality, and described prozyme is papoid and 1: 2~4: 1 mixing of cellulase mass ratio; Enzymolysis and extraction finishes the back centrifugation, gets supernatant liquor and promptly gets enzymolysis solution; Described papoid the enzyme unit that lives be 80-100 ten thousand U/g, the enzyme of the described cellulase unit that lives is 5-10 ten thousand U/g;
(2) enzymolysis solution that obtains of step (1) enters the tangential flow filtration system, and selecting molecular weight cut-off for use is the daltonian ultra-filtration membranes of 100,000 dalton-1,000,000, and pressure is 0~30psi, room temperature, the volumetric flow rate of enzymolysis solution is 125-700mL/min, and cycles of concentration is 10-20 times, gets the ultrafiltration trapped fluid; The concentration of gained ultrafiltration trapped fluid is generally 2mg/mL-12mg/mL;
(3) carry out separation and purification in the ultrafiltration trapped fluid adding radial flow chromatographic column that step (2) obtains, get the polysaccharide elutriant; Adopt weak base anion-exchange resin to fill radial flow chromatographic column, use the pure water wash-out, applied sample amount is 30-120mL, and last sample flow velocity is 1mL/min-10mL/min, and the pure water elution flow rate is 20mL/min-70mL/min; Described weak base anion-exchange resin is A103S resin anion(R.A), A100 resin anion(R.A) or A105 resin anion(R.A);
(4) step (3) gained polysaccharide elutriant concentrates 5-15 doubly in 40~90 ℃ of scopes, and the lyophilize of gained concentrated solution makes ganoderan.
Advantage of the present invention is:
1, set up a cover from the former ganoderma lucidum fruitbody polysaccharide production technique of expecting product, this technology has environmental protection, characteristics fast and efficiently, and is applicable to scale operation, can reduce the technology cost of refining ganoderam lucidum polysaccharide significantly.
2, thoroughly break away from the production technique of traditional ganoderan, do not related to the process of highly energy-consumings such as alcohol precipitation, organic solvent deproteinated, unit decolouring, consumption material, when reducing cost, prepared ganoderan quickly and efficiently.
3, adopt the prozyme solution to extract ganoderma lucidum fruitbody polysaccharide, thereby make the easier extraction of effective constituent reach the purpose of raising extraction yield or reduction solvent-oil ratio by the degrading plant cell walls on the one hand; On the other hand can be at most of impurity (starch, pectin, protein etc.) selectivity degraded wherein, to be more conducive to the carrying out of later separation purifying; Compare with extracting method such as traditional water extraction and ultrasonic, microwaves, can improve polysaccharide yield significantly, the extraction process mild condition is energy-saving and cost-reducing simultaneously.
But 4, adopt that tangential flow filtration membrane concentration enzymolysis solution has that the activity do not damaged, separation efficiency height, energy consumption are low, the simple continuous production of equipment, advantage such as pollution-free; Can ganoderma lucidum fruitbody polysaccharide is carried out concentrated and purified in the screening different molecular weight polysaccharide, be enriched with active polysaccharide; Adopting tangential flow filtration to concentrate the enzymolysis solution required time only is 1/6 of rotary evaporation.
5, adopt radial flow chromatogram that the film trapped fluid is carried out separation and purification and can greatly improve output and speed, also can guarantee the activity of ganoderan; Because radial flow chromatogram has the characteristic of linear amplification, can set up chromatographic condition simultaneously, directly amplify production by lab scale.
Description of drawings
The process flow sheet of Fig. 1 extraction separation ganoderan from Ganoderma sporophore
Fig. 2 different methods extracts glossy ganoderma seed polysaccharide yield comparison diagram
Embodiment
The present invention will be further described with specific embodiment below, but protection scope of the present invention is not limited thereto.
Embodiment 1:
(1) complex enzyme hydrolysis extracts ganoderma lucidum fruitbody polysaccharide: the Ganoderma sporophore of 100 eye mesh screens is crossed in the broken back of selection, get 50.0g Ganoderma sporophore powder, add in the water of 1000g, with saturated aqua calcis regulator solution pH to 6.8, add the 1.5g prozyme, prozyme is that papoid (is gone up sea blue season development in science and technology company limited, 1,000,000 U/g) with cellulase (gold source, Zhangjiagang biochemical industry company limited, 80,000 U/g) 2: 1 mixing of mass ratio, be positioned over 55 ℃ of thermostat water baths, at the uniform velocity stir 2h, centrifugal 10 minutes of 4000rpm gets supernatant liquor and promptly gets enzymolysis solution;
(2) cross-flow ultrafiltration membrane concentration enzymolysis solution: enzymolysis solution enters (the Congent M of tangential flow filtration system, U.S. Millipore Corp.), choosing molecular weight is 1,000,000 daltonian ultra-filtration membranes, the enzymolysis solution volumetric flow rate is 500mL/min, 25 ℃ of room temperatures, pressure is 23-26psi, is concentrated into 17 times, gets the ultrafiltration trapped fluid;
(3) radial flow chromatographic separation and purification trapped fluid: the ultrafiltration trapped fluid adds in the radial flow chromatographic column, the radial flow chromatographic column model is Superflo-250Column, filler is weakly-basic anion A103S, sample size is 100mL, the sample introduction flow velocity is 2mL/min, use the pure water wash-out, elution flow rate is 50mL/min, gets the polysaccharide elutriant;
(4) concentrating under reduced pressure polysaccharide elutriant concentrates 8 times down at 50 ℃, and the lyophilize of gained concentrated solution gets ganoderan product 0.88g, and wherein polysaccharide content is 85%, total sugar content 98%.。
The enzymolysis yield is 3.10%, and polysaccharide content is 80.7% in the preparation gained ganoderan elutriant, and protein content is 0.76%, and comparing with enzymolysis solution and calculating the albumen decreasing ratio is 99.24%.The polysaccharide elutriant is compared with the ultrafiltration trapped fluid, and the polysaccharide recovery in the radial flow process is 89.52%.
To step (1) gained enzymolysis solution, step (2) gained ultrafiltration trapped fluid, step (3) gained polysaccharide elutriant detect total sugar content, DNS method mensuration reducing sugar content, Folin-phenol method mensuration protein content, gained data such as following table 1 with the phenol sulfuric acid process respectively.
The comparison of table 1 different process stage ganoderan
Figure BDA0000068541140000061
Embodiment 2:
(1) complex enzyme hydrolysis extracts ganoderma lucidum fruitbody polysaccharide: the Ganoderma sporophore of 100 eye mesh screens is crossed in the broken back of selection, get 50.0g Ganoderma sporophore powder, add in the water of 500g, with saturated aqua calcis regulator solution pH to 6.0, add the 1.2g prozyme, prozyme is that papoid (is gone up sea blue season development in science and technology company limited, 1,000,000 U/g) with cellulase (gold source, Zhangjiagang biochemical industry company limited, 80,000 U/g) 1: 1 mixing of mass ratio, be positioned over 40 ℃ of thermostat water baths, at the uniform velocity stir 1h, centrifugal 12 minutes of 4000rpm gets supernatant liquor and promptly gets enzymolysis solution;
(2) cross-flow ultrafiltration membrane concentration enzymolysis solution: enzymolysis solution enters the tangential flow filtration system, and choosing molecular weight is 100,000 daltonian ultra-filtration membranes, and the enzymolysis solution volumetric flow rate is 700mL/min, 25 ℃ of room temperatures, and pressure is 28psi, is concentrated into 10 times, gets the ultrafiltration trapped fluid;
(3) radial flow chromatographic separation and purification trapped fluid: the ultrafiltration trapped fluid adds in the radial flow chromatographic column, the radial flow chromatographic column model is Superflo-250Column, filler is weakly-basic anion A103S, sample size is 120mL, the sample introduction flow velocity is 5mL/min, use the pure water wash-out, elution flow rate is 40mL/min, gets the polysaccharide elutriant;
(4) concentrating under reduced pressure polysaccharide elutriant concentrates 10 times down at 55 ℃, and the lyophilize of gained concentrated solution gets ganoderan product 0.91g, and wherein polysaccharide content is 82%, total sugar content 96%.
The enzymolysis yield is 3.02%, and polysaccharide content is 78.1% in the preparation gained ganoderan elutriant, and protein content is 0.62%.
Embodiment 3
(1) complex enzyme hydrolysis extracts ganoderma lucidum fruitbody polysaccharide: the Ganoderma sporophore of 100 eye mesh screens is crossed in the broken back of selection, get 50.0g Ganoderma sporophore powder, add in the water of 1500g, with saturated aqua calcis regulator solution pH to 4.5, add the 0.5g prozyme, prozyme is that papoid (is gone up sea blue season development in science and technology company limited, 1,000,000 U/g) with cellulase (gold source, Zhangjiagang biochemical industry company limited, 80,000 U/g) 4: 1 mixing of mass ratio, be positioned over 65 ℃ of thermostat water baths, at the uniform velocity stir 3h, centrifugal 12 minutes of 4000rpm gets supernatant liquor and promptly gets enzymolysis solution;
(2) cross-flow ultrafiltration membrane concentration enzymolysis solution: enzymolysis solution enters the tangential flow filtration system, and choosing molecular weight is 300,000 daltonian ultra-filtration membranes, and the enzymolysis solution volumetric flow rate is 400mL/min, 25 ℃ of room temperatures, and pressure is 26psi, is concentrated into 20 times, gets the ultrafiltration trapped fluid;
(3) radial flow chromatographic separation and purification trapped fluid: the ultrafiltration trapped fluid adds in the radial flow chromatographic column, the radial flow chromatographic column model is Superflo-250Column, filler is weakly-basic anion A103S, sample size is 50mL, the sample introduction flow velocity is 1mL/min, use the pure water wash-out, elution flow rate is 70mL/min, gets the polysaccharide elutriant;
(4) concentrating under reduced pressure polysaccharide elutriant concentrates 15 times down at 60 degrees centigrade, and the lyophilize of gained concentrated solution gets ganoderan product 1.2g, and wherein polysaccharide content is 83%, total sugar content 96%.
The enzymolysis yield is 2.85%, and the polysaccharide content in the preparation gained ganoderan elutriant is 72.1%, and protein content is 2.8%.
Comparative example 1: boiling water refluxing extraction polysaccharide method: take by weighing the Ganoderma sporophore powder that 20g crosses 100 eye mesh screens, press solid-liquid ratio and add 400mL distilled water at 1: 20, boiling water refluxing extraction 1.5h, gained extracting solution 380mL detects its polysaccharide yield 2.07%, sees Fig. 2.
Comparative example 2: supersound extraction polysaccharide method: take by weighing the Ganoderma sporophore powder that 20g crosses 100 eye mesh screens, press solid-liquid ratio and add 400mL distilled water at 1: 20, ultrasonic power is 800W, pulse 8s extracts 1h, gained extracting solution 385mL, detecting its polysaccharide yield is 2.61%, sees Fig. 2.
Comparative example 3: microwave extraction polysaccharide method: take by weighing the Ganoderma sporophore powder that 20g crosses 100 eye mesh screens, press solid-liquid ratio and add 400mL distilled water at 1: 20, microwave power is 800W, extracting temperature is 90 ℃, extracts 1.5h, gained extracting solution 375mL, detecting its polysaccharide yield is 2.54%, sees Fig. 2.
Comparative example 4: papoid extracting method: take by weighing the Ganoderma sporophore powder that 20g crosses 100 eye mesh screens, press solid-liquid ratio and add 400mL distilled water at 1: 20, enzyme concentration is 3%, hydrolysis temperature is 55 ℃, enzymolysis time is 1.5h, and pH is 5.7, gained enzymolysis solution 390mL, detecting its polysaccharide yield is 2.05%, sees Fig. 2.
Comparative example 5: cellulase extracting method: take by weighing the Ganoderma sporophore powder that 20g crosses 100 eye mesh screens, press solid-liquid ratio and add 400mL distilled water at 1: 20, enzyme concentration is 3%, hydrolysis temperature is 55 ℃, enzymolysis time is 1.5h, and pH is 4.8, gained enzymolysis solution 380mL, detecting its polysaccharide yield is 1.88%, sees Fig. 2.
Comparative example 6: prozyme solution: take by weighing the Ganoderma sporophore powder that 20g crosses 100 eye mesh screens, press solid-liquid ratio and add 400mL distilled water at 1: 20, add prozyme, enzyme concentration is 3%, papoid in the prozyme: cellulase=2: 1 (mass ratio), hydrolysis temperature is 55 ℃, enzymolysis time is 1.5h, and pH is 6.8, gained enzymolysis solution 380mL, detecting its polysaccharide yield is 3.15%, sees Fig. 2.
Comparative example 7 (radial flow chromatogram)
Step (1) operation according to embodiment 1 obtains enzymolysis solution,
The gained enzymolysis solution is carried out radial flow chromatographic separation and purification, condition is: enzymolysis solution adds in the radial flow chromatographic column, the radial flow chromatographic column model is Superflo-250Column, filler is weakly-basic anion A103S, sample size is 100mL, and the sample introduction flow velocity is 2mL/min, uses the pure water wash-out, elution flow rate is 50mL/min, gets the polysaccharide elutriant; The albumen decreasing ratio is 80.59%, and polysaccharide recovery is 89.21%, sees Table 2.
Comparative example 8
Sevag method deproteinated
Sevag reagent: it is 4: 1 mixed solution that chloroform-propyl carbinol is mixed with volume ratio;
Step (1), (2) operation according to embodiment 1 obtain the ultrafiltration trapped fluid, get 50mL ultrafiltration trapped fluid mixes with volume ratio with Sevag reagent at 3: 1,30min fully vibrates in the separating funnel, leave standstill 3h, get the upper strata polysaccharide soln and measure protein and polysaccharide content, calculate its albumen decreasing ratio and polysaccharide recovery, as shown in table 2.
Table 2 different methods removes ganoderan protein test result contrast
Figure BDA0000068541140000101

Claims (5)

1. the method for an extraction separation ganoderan from Ganoderma sporophore, it is characterized in that described method is: the Ganoderma sporophore powder carries out enzymolysis and extraction with prozyme and gets enzymolysis solution, and the gained enzymolysis solution separates to such an extent that ultrafiltration trapped fluid, gained ultrafiltration trapped fluid get polysaccharide elutriant, gained polysaccharide elutriant concentrating under reduced pressure, drying by radial flow chromatogram with the separation and purification of pure water wash-out and make ganoderan through the tangential flow filtration membrane concentration; Described prozyme is papoid and 1: 2~4: 1 mixing of cellulase mass ratio.
2. the method for claim 1, it is characterized in that described Ganoderma sporophore powder carries out enzymolysis and extraction with prozyme and carries out as follows: the Ganoderma sporophore of 100 eye mesh screens is crossed in the broken back of selection, get the Ganoderma sporophore powder, adding quality is in the water of 10~30 times in Ganoderma sporophore powder, adjust pH is 4.5-7, add prozyme, carry out enzymolysis and extraction under stirring, enzymatic hydrolysis condition is: hydrolysis temperature is 40 ℃-65 ℃, enzymolysis time is 1h-3h, the add-on of prozyme is the 1%-5% of Ganoderma sporophore powder quality, and described prozyme is papoid and 1: 2~4: 1 mixing of cellulase mass ratio; Enzymolysis and extraction finishes the back centrifugation, gets supernatant liquor and promptly gets enzymolysis solution; The enzyme of described papoid unit alive is 80-100 ten thousand U/g, and the enzyme of described cellulase unit alive is 5-10 ten thousand U/g.
3. the method for claim 1, it is characterized in that described enzymolysis solution carries out as follows through the separation of tangential flow filtration membrane concentration: enzymolysis solution enters the tangential flow filtration system, selecting molecular weight cut-off for use is the daltonian ultra-filtration membranes of 100,000 dalton-1,000,000, pressure is 0~30psi, room temperature, the volumetric flow rate of enzymolysis solution is 125-700mL/min, and cycles of concentration is 10-20 times, gets the ultrafiltration trapped fluid.
4. the method for claim 1, it is characterized in that described ultrafiltration trapped fluid carries out with the separation and purification of pure water wash-out as follows by radial flow chromatogram: the ultrafiltration trapped fluid adds employing weak base anion-exchange resin filling radial flow chromatographic column in the radial flow chromatographic column, use the pure water wash-out, separation and purification gets the polysaccharide elutriant.
5. the method for claim 1 is characterized in that said method comprising the steps of:
(1) Ganoderma sporophore of 100 eye mesh screens is crossed in the broken back of selection, get the Ganoderma sporophore powder, adding quality is in the water of 10~30 times in Ganoderma sporophore powder, adjust pH is 4.5-7, adds prozyme, carries out enzymolysis and extraction under stirring, enzymatic hydrolysis condition is: hydrolysis temperature is 40 ℃-65 ℃, enzymolysis time is 1h-3h, and the add-on of prozyme is the 1%-5% of Ganoderma sporophore powder quality, and described prozyme is papoid and 1: 2~4: 1 mixing of cellulase mass ratio; Enzymolysis and extraction finishes the back centrifugation, gets supernatant liquor and promptly gets enzymolysis solution; Described papoid the enzyme unit that lives be 80-100 ten thousand U/g, the enzyme of the described cellulase unit that lives is 5-10 ten thousand U/g;
(2) enzymolysis solution that obtains of step (1) enters the tangential flow filtration system, and selecting molecular weight cut-off for use is the daltonian ultra-filtration membranes of 100,000 dalton-1,000,000, and pressure is 0~30psi, room temperature, the volumetric flow rate of enzymolysis solution is 125-700mL/min, and cycles of concentration is 10-20 times, gets the ultrafiltration trapped fluid;
(3) carry out separation and purification in the ultrafiltration trapped fluid adding radial flow chromatographic column that step (2) obtains, get the polysaccharide elutriant; Adopt weak base anion-exchange resin to fill radial flow chromatographic column, use the pure water wash-out, applied sample amount is 30-120mL, and last sample flow velocity is 1mL/min-10mL/min, and the pure water elution flow rate is 20mL/min-70mL/min; Described weak base anion-exchange resin is A103S resin anion(R.A), A100 resin anion(R.A) or A105 resin anion(R.A);
(4) step (3) gained polysaccharide elutriant concentrates 5-15 doubly in 40~90 ℃ of scopes, gained concentrated solution obtained by freeze drying ganoderan.
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