CN108640953A - Using macroreticular resin to the process for purification of pumpkin oligosaccharide - Google Patents

Using macroreticular resin to the process for purification of pumpkin oligosaccharide Download PDF

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CN108640953A
CN108640953A CN201810394655.XA CN201810394655A CN108640953A CN 108640953 A CN108640953 A CN 108640953A CN 201810394655 A CN201810394655 A CN 201810394655A CN 108640953 A CN108640953 A CN 108640953A
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pumpkin
oligosaccharide
resin
macroreticular resin
washed
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CN108640953B (en
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李全宏
梁莉
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Guonong Lvyuan Beijing Agricultural Science And Technology Research Institute Co ltd
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China Agricultural University
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    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07HSUGARS; DERIVATIVES THEREOF; NUCLEOSIDES; NUCLEOTIDES; NUCLEIC ACIDS
    • C07H1/00Processes for the preparation of sugar derivatives
    • C07H1/06Separation; Purification
    • AHUMAN NECESSITIES
    • A23FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23LFOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
    • A23L33/00Modifying nutritive qualities of foods; Dietetic products; Preparation or treatment thereof
    • A23L33/10Modifying nutritive qualities of foods; Dietetic products; Preparation or treatment thereof using additives
    • AHUMAN NECESSITIES
    • A23FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23LFOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
    • A23L5/00Preparation or treatment of foods or foodstuffs, in general; Food or foodstuffs obtained thereby; Materials therefor
    • A23L5/40Colouring or decolouring of foods
    • A23L5/42Addition of dyes or pigments, e.g. in combination with optical brighteners
    • A23L5/43Addition of dyes or pigments, e.g. in combination with optical brighteners using naturally occurring organic dyes or pigments, their artificial duplicates or their derivatives
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P1/00Drugs for disorders of the alimentary tract or the digestive system
    • A61P1/02Stomatological preparations, e.g. drugs for caries, aphtae, periodontitis
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P3/00Drugs for disorders of the metabolism
    • A61P3/08Drugs for disorders of the metabolism for glucose homeostasis
    • A61P3/10Drugs for disorders of the metabolism for glucose homeostasis for hyperglycaemia, e.g. antidiabetics
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P39/00General protective or antinoxious agents
    • A61P39/06Free radical scavengers or antioxidants
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07HSUGARS; DERIVATIVES THEREOF; NUCLEOSIDES; NUCLEOTIDES; NUCLEIC ACIDS
    • C07H3/00Compounds containing only hydrogen atoms and saccharide radicals having only carbon, hydrogen, and oxygen atoms
    • C07H3/04Disaccharides
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07HSUGARS; DERIVATIVES THEREOF; NUCLEOSIDES; NUCLEOTIDES; NUCLEIC ACIDS
    • C07H3/00Compounds containing only hydrogen atoms and saccharide radicals having only carbon, hydrogen, and oxygen atoms
    • C07H3/06Oligosaccharides, i.e. having three to five saccharide radicals attached to each other by glycosidic linkages
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08BPOLYSACCHARIDES; DERIVATIVES THEREOF
    • C08B37/00Preparation of polysaccharides not provided for in groups C08B1/00 - C08B35/00; Derivatives thereof
    • C08B37/0006Homoglycans, i.e. polysaccharides having a main chain consisting of one single sugar, e.g. colominic acid
    • C08B37/0024Homoglycans, i.e. polysaccharides having a main chain consisting of one single sugar, e.g. colominic acid beta-D-Glucans; (beta-1,3)-D-Glucans, e.g. paramylon, coriolan, sclerotan, pachyman, callose, scleroglucan, schizophyllan, laminaran, lentinan or curdlan; (beta-1,6)-D-Glucans, e.g. pustulan; (beta-1,4)-D-Glucans; (beta-1,3)(beta-1,4)-D-Glucans, e.g. lichenan; Derivatives thereof
    • C08B37/00272-Acetamido-2-deoxy-beta-glucans; Derivatives thereof
    • C08B37/003Chitin, i.e. 2-acetamido-2-deoxy-(beta-1,4)-D-glucan or N-acetyl-beta-1,4-D-glucosamine; Chitosan, i.e. deacetylated product of chitin or (beta-1,4)-D-glucosamine; Derivatives thereof
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09BORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B61/00Dyes of natural origin prepared from natural sources, e.g. vegetable sources
    • AHUMAN NECESSITIES
    • A23FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23VINDEXING SCHEME RELATING TO FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES AND LACTIC OR PROPIONIC ACID BACTERIA USED IN FOODSTUFFS OR FOOD PREPARATION
    • A23V2002/00Food compositions, function of food ingredients or processes for food or foodstuffs

Abstract

Refined method carries out pumpkin oligosaccharide using macroreticular resin the invention discloses a kind of, step includes:Add water to be made into pumpkin oligosaccharide upper prop solution pumpkin oligosaccharide crude extract, adsorbed by the chromatographic column equipped with macroreticular resin, collects efflux;It stands, macroreticular resin is eluted with deionized water, be concentrated by evaporation, freeze-drying, obtain colourless pumpkin oligosaccharide;It is washed using ethanol solution, is impregnated using ethyl alcohol, NaOH solution is by resin column and impregnates, and is washed to neutrality;It by resin column and is impregnated using hydrochloric acid, recycles macroreticular resin;Revolving evaporation and freeze-drying, recycle foreign pigment and ethyl alcohol.The process for purification can remove monosaccharide and protein impurities simultaneously while reaching pumpkin oligosaccharide efficient decolorizing, and the purity of gained pumpkin oligosaccharide is up to 95~96%;And the process mild condition, should not high temperature or soda acid processing, without causing the degradation of pumpkin oligosaccharide, gained foreign pigment melanoidin that can recycle.

Description

Using macroreticular resin to the process for purification of pumpkin oligosaccharide
Technical field
The invention belongs to the technical field of purification of pumpkin oligosaccharide, and in particular to a kind of oligomeric to pumpkin using macroreticular resin The process for purification of sugar.
Background technology
Numerous studies have demonstrated that the functional sugars ingredient such as polysaccharide, oligosaccharide in pumpkin has the function of blood glucose-control, and The functional sugar is also widely approved as a kind of ingredient of natural botanical source, safety.Oligosaccharide (oligosaccharide) and oligosaccharides is can be described as, is the minuent by 2-10 monosaccharide by glucosides key connection at linear chain or branched chain Polymerization sugar, molecular weight is between 200~3000D.Due to monosaccharide molecule binding site and bond type difference, it is rich to form type Rich oligosaccharide.Oligosaccharide has good functional characteristic, can be used as sweet taste source, but do not degraded by human body hydrochloric acid in gastric juice, gastric enzyme, does not exist Intestinal absorption, into large intestine after selectively promote the proliferation of beneficial bacterium and inhibit pathogen and diarrhea, also protect liver, reduce The functions such as serum cholesterol, anti-caries tooth.Oligosaccharide is because its unique functional characteristic is concerned, and future is in functional food, feed There are good researching value and application potential with fields such as additives.
Currently, mostly using water extraction and alcohol precipitation method prepares squash polyoses, in separation process in macromolecular polysaccharide supernatants after precipitation Still contain a large amount of carbohydrate, thus it is speculated that be the lower oligosaccharide of molecular weight.Supernatant is generally efficiently separated using membrane filter method In pumpkin oligosaccharide crude product, however product be in dark brown brown, be by pumpkin pigment and process in generate it is coloured Impurity causes, and obstacle is caused to the purifying of pumpkin oligosaccharide, structural research and industrial applications.
Common discoloration method has in the food industry at present, such as organic solvent decoloring method, activated carbon decolorizing method, activated carbon Adsorption decoloring method, hydrogen peroxide for decoloration method.It is low, broken that there are decolorizing efficiencies when however, these methods being decolourized applied to pumpkin oligosaccharide Bad oligosaccharide structures such as hydrogen peroxide oxidation destroys the problems such as sugar chain, operation cost are high and recycling is difficult.Therefore, it studies a kind of high Effect, the pumpkin oligosaccharide decoloration of environmental protection, impurity-removing method are of great significance.
Macroreticular resin has been developed in recent years a kind of organic polymer adsorbent, is decolourized for natural extract Effective ways.Compared with traditional discoloration method, macroreticular resin decoloring method has easy to operate, and separative efficiency is high, is easily recycled, at This is low and pollutes the features such as small.
Invention content
The purpose of the present invention is to provide a kind of using macroreticular resin to the process for purification of pumpkin oligosaccharide, existing to overcome There is in pumpkin oligosaccharide the shortcomings that coloring matter decolorizing effect is poor, removal of impurity is low, destruction oligosaccharide structures.
To realize said one or multiple purposes, in one embodiment of the invention, the present invention provides one kind to adopt With macroreticular resin to the process for purification of pumpkin oligosaccharide, include the following steps:
(1) pumpkin oligosaccharide crude extract is added into water, is made into pumpkin oligosaccharide upper prop solution;By 0.8~1.5 times of column volume (BV) the pumpkin oligosaccharide upper prop solution carries out upper prop absorption by the chromatographic column equipped with macroreticular resin, then collects outflow Liquid;
(2) it stands, then macroreticular resin is eluted with deionized water, by remaining pumpkin oligosaccharide eluent and step in column (1) gained efflux merges in, is then concentrated by evaporation, is lyophilized, obtains colourless pumpkin oligosaccharide;
(3) foreign pigment on the ethanol solution elution absorption macroreticular resin of 1.5~2.2BV is used;It is impregnated using ethyl alcohol, It is washed with water to no alcohol taste, by resin column and is impregnated using NaOH solution, be washed to neutrality;Then resin column is passed through using hydrochloric acid And impregnate, it is washed to neutrality, recycles macroreticular resin;Finally, it evaporates and is freeze-dried through revolving, recycle foreign pigment and ethyl alcohol.
In above-mentioned process for purification, the part monosaccharide and albumen in pumpkin oligosaccharide crude extract can be removed by macroreticular resin Matter.Specifically removal principle is:It is acted on by the molecular sieve of macroreticular resin so that the different oligosaccharide of molecular weight and monosaccharide are divided From;It is different with physics, chemical property further according to protein and the sugared structure of itself, lead to the albumen in pumpkin oligosaccharide crude extract The absorption on macroreticular resin of matter and oligosaccharide, elution property are different so that partially protein is removed;In short, by big Macroporous adsorbent resin finally eliminates part monosaccharide and protein in pumpkin oligosaccharide.
In a preferred embodiment of the invention, the present invention provides a kind of using macroreticular resin to pumpkin oligosaccharide Process for purification, the mass percent concentration of pumpkin oligosaccharide upper prop solution described in above-mentioned steps (1) is 230~280mg/ ml;
And/or the pumpkin oligosaccharide upper prop solution passes through the layer equipped with macroreticular resin with the flow velocity of 0.8~1.5BV/h Analyse column.
In the case that wherein, macroreticular resin amount is certain, loading flow velocity is slow, applied sample amount is few experimental group and elution speed be slow, It is more preferable to elute the big experimental group decolorizing effect of liquid measure, but speed is excessively slow and measured conference and leads to cost increase.
In a preferred embodiment of the invention, the present invention provides a kind of using macroreticular resin to pumpkin oligosaccharide Process for purification, using preceding being pre-processed, concrete operations are macroreticular resin described in above-mentioned steps (1):First using go from Sub- water impregnates macroreticular resin, is washed till with ethyl alcohol not muddy;Then it is impregnated, is washed with deionized water to no alcohol taste with ethyl alcohol;Matter is used again The NaOH solution that amount percent concentration is 5% by resin column and impregnates resin, is washed to neutrality, is by mass percent concentration 5% hydrochloric acid is by resin column and impregnates resin, is finally washed to neutral to get to the macroreticular resin handled well.
In a preferred embodiment of the invention, the present invention provides a kind of using macroreticular resin to pumpkin oligosaccharide Process for purification, in above-mentioned pretreatment, using deionized water impregnate and ethyl alcohol impregnate time be 20~30h.
In a preferred embodiment of the invention, the present invention provides a kind of using macroreticular resin to pumpkin oligosaccharide Process for purification, in above-mentioned pretreatment, resin impregnated using NaOH solution or be 1~4h using time of salt acid soak resin.
In a preferred embodiment of the invention, the present invention provides a kind of using macroreticular resin to pumpkin oligosaccharide Process for purification, in above-mentioned steps (2), the time of the standing is 45~60min;
And/or the deionized water elutes macroreticular resin with the speed of 1.0~3.0BV/h.
In a preferred embodiment of the invention, the present invention provides a kind of using macroreticular resin to pumpkin oligosaccharide Process for purification, the concentration of volume percent of ethanol solution is 60~80% described in above-mentioned steps (3).
In a preferred embodiment of the invention, the present invention provides a kind of using macroreticular resin to pumpkin oligosaccharide Process for purification, the macroreticular resin is selected from ion exchange resin, one or both of non-polar macroporous resin, preferably right and wrong Polar macroporous resin.
In a preferred embodiment of the invention, the present invention provides a kind of using macroreticular resin to pumpkin oligosaccharide Process for purification, the non-polar macroporous resin in DM21 types macroporous absorbent resin, DM28 type macroporous absorbent resins one Kind is several.
In a preferred embodiment of the invention, the present invention provides a kind of using macroreticular resin to pumpkin oligosaccharide Process for purification, the material of the chromatographic column is strengthened glass, and specification is 6cm × 80cm;
And/or the macroreticular resin is packed at the 3/4 of chromatographic column when using.
In a preferred embodiment of the invention, the present invention provides a kind of using macroreticular resin to pumpkin oligosaccharide Process for purification, it is 1: 10 that resin ratio of height to diameter is packed into the chromatographic column.Wherein, in the case of macroreticular resin amount is certain, chromatographic column Ratio of height to diameter is big, is conducive to remove monosaccharide impurity.
In a preferred embodiment of the invention, the present invention provides a kind of using macroreticular resin to pumpkin oligosaccharide Process for purification, the preparation method of pumpkin oligosaccharide crude extract described in above-mentioned steps (1) includes:
(1) by pumpkin remove seed, stripping and slicing, water is added to be beaten, hot water extraction, centrifuging and taking supernatant is concentrated into former supernatant volume 1/2~1/5, obtain concentrate;
(2) ethyl alcohol is added to be precipitated, centrifuging and taking supernatant;
(3) supernatant is diluted to and is crossed 20 μm of filter bags, filtrate first passes through ultrafiltration section, and ultrafiltration retaining molecular weight is 3000Da, permeate are 300Da by nanofiltration section, nanofiltration retaining molecular weight, and it is pumpkin oligosaccharide crude extract to be trapped liquid.
In a preferred embodiment of the invention, the present invention provides a kind of using macroreticular resin to pumpkin oligosaccharide Process for purification, in the preparation method of above-mentioned pumpkin oligosaccharide crude extract, the temperature of hot water is 80~90 DEG C in step (1), institute The time for stating hot water extraction is 1~3h.
In a preferred embodiment of the invention, the present invention provides a kind of using macroreticular resin to pumpkin oligosaccharide Process for purification, in the preparation method of above-mentioned pumpkin oligosaccharide crude extract, the percent by volume of ethanol solution described in step (2) A concentration of 70~90%, preferably 80%.
In a preferred embodiment of the invention, the present invention provides a kind of using macroreticular resin to pumpkin oligosaccharide Process for purification, in the preparation method of above-mentioned pumpkin oligosaccharide crude extract, ethanol solution described in step (2) and step (1) institute The volume ratio for obtaining concentrate is 2~5: 1.
Compared with prior art, the present invention has the advantages that:
(1) macroporous adsorption resin technology is applied in the production technology of pumpkin oligosaccharide by the present invention, macroporous resin adsorption Foreign pigment in solution, since molecular sieve effect also has certain removal to make the monosaccharide impurity in pumpkin oligosaccharide crude product With while reaching pumpkin oligosaccharide efficient decolorizing, monosaccharide and protein impurities can be removed simultaneously, and recoverable is coloured miscellaneous Matter;The purity of gained pumpkin oligosaccharide is high, and up to 94~96%, it is found without apparent impurity, into one through high performance liquid chromatography detection Step improves the quality of the oligomeric sugar product of pumpkin.
(2) in the process for purification that the present invention uses, pH value need not have been adjusted both when preparing pumpkin oligosaccharide upper prop solution Its impurity and color can efficiently be removed;The waste that the process for purification treatment conditions of the present invention are mild, low energy consumption, generate is few, In macroreticular resin decolorization, should not high temperature or soda acid processing, without causing the degradation of pumpkin oligosaccharide, and by before refined The infrared spectrum of pumpkin oligosaccharide compares it can be proved that the structure of principal component oligosaccharide does not change afterwards.
(3) foreign pigment that process for purification of the invention is removed is that Maillard reaction produces in pumpkin oligosaccharide extraction process It is de- can to collect oligosaccharide compared with traditional activated carbon decolorizing and hydrogen peroxide decoloring method respectively for raw coloring matter melanoidin Color liquid (washing) and foreign pigment eluent (70% ethyl alcohol is washed), while retaining the structure feature and property of oligosaccharide itself Colored component (rate of recovery 79%) can be recycled;In addition, since the color product melanoidin of Maillard reaction is in some researchs Report has anti-oxidant, anti-caries and a blood glucose-control effect, thus the colored component that recycles of the present invention in healthy food material and There is preferable application prospect in terms of functional additive.
Description of the drawings
Attached drawing described herein is used to provide further understanding of the present invention, and is constituted part of this application.Attached In figure:
Fig. 1 is the comparison of the refined front and back color of pumpkin oligosaccharide solution according to the present invention.
Fig. 2 is the high-efficient liquid phase chromatogram of the pumpkin oligosaccharide solution molecular weight detection of 1 gained according to embodiments of the present invention (HPLC)。
Fig. 3 is the pumpkin oligosaccharide solution ultraviolet-visible light full wavelength scanner figure of 2 gained according to embodiments of the present invention.
Fig. 4 is the pumpkin oligosaccharide solution infrared spectrogram of 1 gained according to embodiments of the present invention.
Specific implementation mode
Below in conjunction with the accompanying drawings, the specific implementation mode of the present invention is described in detail, it is to be understood that the guarantor of the present invention Shield range is not restricted by specific implementation.
Experimental method used in following embodiments is conventional method unless otherwise specified.
Material used in above-described embodiment, reagent etc., are commercially available unless otherwise specified.
The experimental facilities and condition that ultraviolet-visible full wavelength scanner uses:Ultraviolet-visible spectrophotometer UV- visspectrophotometer(T6-1650E)。
The experimental facilities and condition that molecular weight high performance liquid chromatography uses:German Nore Knauer high performance liquid chromatographs, Sample size 20ul, detection time 20min, sample introduction concentration 1%, 38 DEG C of column temperature.
The experimental facilities and condition that infrared spectrum uses:Fourier infrared spectrograph Nicolet 6700FTIR spectrometer(Madison,WI,U.S.A)。
Embodiment 1
It is a kind of using macroreticular resin to the process for purification of pumpkin oligosaccharide, carry out in accordance with the following steps:
(1) macroreticular resin pre-processes:DM28 types macroporous absorbent resin is impregnated for 24 hours using deionized water, is washed till not with ethyl alcohol Muddiness, ethyl alcohol are impregnated for 24 hours, are washed with water to no alcohol taste, and the NaOH solution for being 5% with mass percent concentration by resin column and is soaked 2h is steeped, neutrality is washed to, the HCl that mass percent concentration is 5% by resin column and is impregnated into 4h, is washed to neutrality, 4 DEG C standby With;It is packed at chromatographic column (6cm × 80cm) 3/4 when use, it is ensured that uniform filling is smooth and bubble-free;
(2) water is added to be made into the solution of a concentration of 250mg/ml pumpkin oligosaccharide crude extract, by 1.0 times of column volumes (BV) Above-mentioned solution, by the chromatographic column equipped with macroreticular resin, is carried out upper prop absorption, then collects efflux with the flow velocity of 1.0BV/h;
(3) after pumpkin oligosaccharide solution all by the splitter equipped with macroreticular resin after, stand 50min, then use 2.0BV deionized waters have adsorbed the macroreticular resin of foreign pigment with the speed elution of 1.5BV/h, and remaining pumpkin in column is oligomeric Sugar elution is concentrated by evaporation after merging with efflux obtained by step (2), and colourless pumpkin oligosaccharide is obtained after freeze-drying;
(4) ethanol solution that the concentration of volume percent for reusing 2.0BV is 70% will be adsorbed on the speed of 1.5BV/h Foreign pigment elution on macroreticular resin;
(5) macroreticular resin clean and reuse is carried out after the completion of operation every time, is impregnated for 24 hours, is washed with water to no alcohol taste using ethyl alcohol, 2h by resin column and is impregnated using 5%NaOH solution, is washed to neutrality, 5%HCl is by resin column and impregnates 2h, is washed to Neutrality recycles macroreticular resin;Finally, it evaporates and is freeze-dried using revolving, recycle foreign pigment and ethyl alcohol.
The preparation method of above-mentioned pumpkin oligosaccharide crude extract includes:By pumpkin remove seed, stripping and slicing, the water of 2~5 times of weight is added to beat Slurry, uses temperature for 85 DEG C of hot water extraction 2h, and centrifuging and taking supernatant is concentrated into the 1/2 of former supernatant volume;
Then, 2 times of 80% ethanol precipitations of volume, centrifuging and taking supernatant is added;Supernatant after extraction squash polyoses is dilute It releases and crosses 20 μm of filter bags;
Filtrate first passes through ultrafiltration section, and ultrafiltration retaining molecular weight is 3000Da, then passes through nanofiltration section, NF membrane retention point Son amount is 300Da, and it is pumpkin oligosaccharide crude extract to be trapped liquid.
Big pore resin model is DM28 type macroporous absorbent resins in implementation;Chromatography column material is strengthened glass, specification For (6cm × 80cm), it is 1: 10 to be packed into resin blade diameter length ratio;After the chromatographic column equipped with macroreticular resin, quiescent time is 55min。
The refined front and back color contrast of pumpkin oligosaccharide solution manufactured in the present embodiment is as shown in Figure 1, refined by macroreticular resin After processing, the percent of decolourization of pumpkin oligosaccharide reaches 92.6%, and color contrast can be seen that by macroporous absorbent resin from Fig. 1 After processing, dark brown solution becomes close to transparent solution, and therefore, the process for purification of this implementation achieves preferable decoloration effect Fruit.
According to fig. 2 shown in the high-efficient liquid phase chromatogram of 1 gained pumpkin oligosaccharide solution molecular weight detection of middle embodiment, by essence The molecular weight distribution of pumpkin oligosaccharide solution concentrates on 1000~1300Da after system, and molecular weight ranges belong to the molecular weight of oligosaccharide distribution Range, purity 96%, percent of decolourization 92.4%.
Show the front and back pumpkin oligosaccharide of decoloration according to the infrared spectrogram of 1 gained pumpkin oligosaccharide solution of embodiment in Fig. 4 The chemical constitution of key component illustrates that Flavonoids by Macroporous Adsorption Resin will not be to pumpkin oligosaccharide in subtractive process without significant difference Structure damages, and can protect the functional group in pumpkin oligosaccharide well.
Embodiment 2
It is a kind of using macroreticular resin to the process for purification of pumpkin oligosaccharide, carry out in accordance with the following steps:
(1) macroreticular resin pre-processes:DM21 type macroporous absorbent resin 30h are impregnated using deionized water, are washed till not with ethyl alcohol Muddiness, ethyl alcohol impregnate 30h, are washed with water to no alcohol taste, and the NaOH solution for being 5% with mass percent concentration by resin column and is soaked 4h is steeped, neutrality is washed to, the HCl that mass percent concentration is 5% by resin column and is impregnated into 4h, is washed to neutrality, 4 DEG C standby With;It is packed at the 3/4 of chromatographic column when use, it is ensured that uniform filling is smooth and bubble-free;
(2) water is added to be made into the solution of a concentration of 280mg/ml pumpkin oligosaccharide crude extract, by 1.5 times of column volumes (BV) Above-mentioned solution, by the chromatographic column equipped with macroreticular resin, is carried out upper prop absorption, then collects efflux with the flow velocity of 1.5BV/h;
(3) after pumpkin oligosaccharide solution all by the splitter equipped with macroreticular resin after, stand 60min, then use 2.5BV deionized waters have adsorbed the macroreticular resin of foreign pigment with the speed elution of 1.0BV/h, and remaining pumpkin in column is oligomeric Sugar elution is concentrated by evaporation after merging with efflux obtained by step (2), and colourless pumpkin oligosaccharide is obtained after freeze-drying;
(4) ethanol solution that the concentration of volume percent for reusing 2.2BV is 80% will be adsorbed on the speed of 1.0BV/h Foreign pigment elution on macroreticular resin;
(5) macroreticular resin clean and reuse is carried out after the completion of operation every time, is impregnated for 24 hours, is washed with water to no alcohol taste using ethyl alcohol, 4h by resin column and is impregnated using 5%NaOH solution, is washed to neutrality, 5%HCl is by resin column and impregnates 4h, is washed to It is neutral;Finally, macroreticular resin is recycled;Finally, it evaporates and is freeze-dried using revolving, recycle foreign pigment and ethyl alcohol.
The preparation method of above-mentioned pumpkin oligosaccharide crude extract includes:By pumpkin remove seed, stripping and slicing, add the water mashing of 5 times of weight, Then row uses hot water extraction 2h at a temperature of 90 °C, centrifuging and taking supernatant is concentrated into the 1/5 of former supernatant volume;
Then, 5 times of 80% ethanol precipitations of volume, centrifuging and taking supernatant is added;Supernatant after extraction squash polyoses is dilute It releases and crosses 20 μm of filter bags;
Filtrate first passes through ultrafiltration section, and ultrafiltration retaining molecular weight is 3000Da, then passes through nanofiltration section, NF membrane retention point Son amount is 300Da, and it is pumpkin oligosaccharide crude extract to be trapped liquid.
Big pore resin model is DM21 type macroporous absorbent resins in this implementation;Chromatography column material is strengthened glass, rule Lattice are 6cm × 80cm, and it is 1: 10 to be packed into resin blade diameter length ratio;After the chromatographic column equipped with macroreticular resin, quiescent time is 50min。
Pumpkin oligosaccharide percent of decolourization manufactured in the present embodiment is 89.1%, purity 95%, and pumpkin according to Fig.3, The front and back ultraviolet-visible spectrum comparison of oligosaccharide solution decoloration is it is found that absorbing proteins peak declines at 280nm, therefore, the present embodiment 2 can remove the albumen in pumpkin oligosaccharide crude extract.
Embodiment 3
The pumpkin oligosaccharide crude extract that the present embodiment uses for embodiment 1 in pumpkin oligosaccharide crude extract obtained.
It is a kind of using macroreticular resin to the process for purification of pumpkin oligosaccharide, carry out in accordance with the following steps:
(1) macroreticular resin pre-processes:DM28 type macroporous absorbent resin 20h are impregnated using deionized water, are washed till not with ethyl alcohol Muddiness, ethyl alcohol impregnate 20h, are washed with water to no alcohol taste, and the NaOH solution for being 5% with mass percent concentration by resin column and is soaked 1h is steeped, neutrality is washed to, the HCl that mass percent concentration is 5% by resin column and is impregnated into 1h, is washed to neutrality, 4 DEG C standby With;It is packed at chromatographic column (6cm × 80cm) 3/4 when use, it is ensured that uniform filling is smooth and bubble-free;
(2) water is added to be made into the solution of a concentration of 230mg/ml pumpkin oligosaccharide crude extract, by 0.8 times of column volume (BV) Above-mentioned solution, by the chromatographic column equipped with macroreticular resin, is carried out upper prop absorption, then collects efflux with the flow velocity of 0.8BV/h;
(3) after pumpkin oligosaccharide solution all by the splitter equipped with macroreticular resin after, stand 45min, then use 1.5BV deionized waters have adsorbed the macroreticular resin of foreign pigment with the speed elution of 1.0BV/h, and remaining pumpkin in column is oligomeric Sugar elution is concentrated by evaporation after merging with efflux obtained by step (2), and colourless pumpkin oligosaccharide is obtained after freeze-drying;
(4) ethanol solution that the concentration of volume percent for reusing 2.2BV is 60% will be adsorbed on the speed of 1.5BV/h Foreign pigment elution on macroreticular resin;
(5) macroreticular resin clean and reuse is carried out after the completion of operation every time, is impregnated for 24 hours, is washed with water to no alcohol taste using ethyl alcohol, 2h by resin column and is impregnated using 5%NaOH solution, is washed to neutrality, 5%HCl is by resin column and impregnates 2h, is washed to Neutrality recycles macroreticular resin;Finally, it evaporates and is freeze-dried using revolving, recycle foreign pigment and ethyl alcohol.
Pumpkin oligosaccharide percent of decolourization manufactured in the present embodiment is 88.6%, purity 94%.
The description of the aforementioned specific exemplary embodiment to the present invention is in order to illustrate and illustration purpose.These descriptions It is not wishing to limit the invention to disclosed precise forms, and it will be apparent that according to the above instruction, can much be changed And variation.The purpose of selecting and describing the exemplary embodiment is that explaining the specific principle of the present invention and its actually answering With so that those skilled in the art can realize and utilize the present invention a variety of different exemplary implementation schemes and Various chooses and changes.The scope of the present invention is intended to be limited by claims and its equivalents.

Claims (10)

1. it is a kind of using macroreticular resin to the process for purification of pumpkin oligosaccharide, which is characterized in that include the following steps:
(1) pumpkin oligosaccharide crude extract is added into water, is made into pumpkin oligosaccharide upper prop solution;By 0.8~1.5 times of column volume (BV) institute Pumpkin oligosaccharide upper prop solution is stated by the chromatographic column equipped with macroreticular resin, upper prop absorption is carried out, then collects efflux;
(2) it stands, then macroreticular resin is eluted with deionized water, by remaining pumpkin oligosaccharide eluent in column and step (1) Middle gained efflux merges, and is then concentrated by evaporation, is lyophilized, obtains colourless pumpkin oligosaccharide;
(3) foreign pigment on the ethanol solution elution absorption macroreticular resin of 1.5~2.2BV is used;It is impregnated using ethyl alcohol, uses water It is washed till no alcohol taste, by resin column and is impregnated using NaOH solution, is washed to neutrality;Then it by resin column and is soaked using hydrochloric acid Bubble is washed to neutrality, recycles macroreticular resin;Finally, it evaporates and is freeze-dried through revolving, recycle foreign pigment and ethyl alcohol.
2. process for purification according to claim 1, which is characterized in that pumpkin oligosaccharide upper prop solution described in step (1) Mass percent concentration be 230~280mg/ml.
3. process for purification according to claim 1, which is characterized in that macroreticular resin described in step (1) uses preceding progress Pretreatment, concrete operations are:It uses deionized water to impregnate macroreticular resin first, is washed till with ethyl alcohol not muddy;Then it is soaked with ethyl alcohol Bubble, is washed with deionized water to no alcohol taste;The NaOH solution for being again 5% with mass percent concentration by resin column and impregnates tree Fat is washed to neutrality, and the hydrochloric acid that mass percent concentration is 5% by resin column and is impregnated resin, is finally washed to neutrality, To obtain the final product to the macroreticular resin handled well.
4. process for purification according to claim 1, which is characterized in that the volume basis of ethanol solution described in step (3) Specific concentration is 60~80%.
5. process for purification according to claim 1, which is characterized in that the macroreticular resin is selected from ion exchange resin, non- One or both of polar macroporous resin, preferably non-polar macroporous resin.
6. process for purification according to claim 5, which is characterized in that the non-polar macroporous resin is selected from DM21 type macropores Adsorb one or more of resin, DM28 type macroporous absorbent resins.
7. process for purification according to claim 1, which is characterized in that the material of the chromatographic column is strengthened glass, specification For 6cm × 80cm.
8. process for purification according to claim 1, which is characterized in that pumpkin oligosaccharide crude extract described in step (1) Preparation method includes:
(1) by pumpkin remove seed, stripping and slicing, water is added to be beaten, hot water extraction, centrifuging and taking supernatant is concentrated into the 1/2 of former supernatant volume ~1/5, obtain concentrate;
(2) ethyl alcohol is added to be precipitated, centrifuging and taking supernatant;
(3) supernatant is diluted to and is crossed 20 μm of filter bags, filtrate first passes through ultrafiltration section, and ultrafiltration retaining molecular weight is 3000Da, thoroughly Liquid is crossed by nanofiltration section, nanofiltration retaining molecular weight is 300Da, and it is pumpkin oligosaccharide crude extract to be trapped liquid.
9. process for purification according to claim 8, which is characterized in that the volume basis of ethanol solution described in step (2) Specific concentration is 70~90%, preferably 80%.
10. process for purification according to claim 8, which is characterized in that ethanol solution described in step (2) and step (1) The volume ratio of gained concentrate is 2~5: 1.
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Publication number Priority date Publication date Assignee Title
CN112480283A (en) * 2020-12-28 2021-03-12 湖南中医药大学 Method for preparing neutral oligosaccharide from rhizoma polygonati
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