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CN111346398A - Method for extracting scopoletin and total flavonoids from sunflower disc - Google Patents

Method for extracting scopoletin and total flavonoids from sunflower disc Download PDF

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CN111346398A
CN111346398A CN202010162342.9A CN202010162342A CN111346398A CN 111346398 A CN111346398 A CN 111346398A CN 202010162342 A CN202010162342 A CN 202010162342A CN 111346398 A CN111346398 A CN 111346398A
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extraction
scopoletin
sunflower
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CN111346398B (en
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张天佑
梁耀光
杨茂义
张文晋
杨适
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Beijing Novo Tech Biotechnology Co ltd
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    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D11/00Solvent extraction
    • B01D11/02Solvent extraction of solids
    • B01D11/0203Solvent extraction of solids with a supercritical fluid
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    • C07D311/04Benzo[b]pyrans, not hydrogenated in the carbocyclic ring
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    • C07D311/08Benzo[b]pyrans, not hydrogenated in the carbocyclic ring with oxygen or sulfur atoms directly attached in position 2 not hydrogenated in the hetero ring
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    • A61K2236/30Extraction of the material
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract

The invention discloses a method for extracting scopoletin and total flavonoids from a sunflower disc, belonging to the technical field of natural product separation. The method comprises the following steps of extracting by adopting a supercritical fluid extraction technology under the following conditions: extraction pressure: 26-32MPa, extraction temperature: the extraction time is 30-75min at 40-50 ℃, and the dosage proportion of entrainer is 0-1500ml per 300L of extractant. The method provided by the invention can be used for extracting scopoletin and total flavonoids from sunflower discs, and the extraction rates of the scopoletin and the total flavonoids are respectively up to more than 95%.

Description

Method for extracting scopoletin and total flavonoids from sunflower disc
Technical Field
The invention belongs to the field of natural product separation, and particularly relates to a method for extracting scopoletin and total flavonoids from a sunflower disc.
Background
Sunflower (Helianthus annuus L.) also called sunflower belongs to Helianthus of Compositae, and is one of the main oil crops in China in North America as the primary product, the oil yield is second to soybean, and the sunflower seed as the fruit can be eaten for a long time.
The sunflower head refers to the flower disc of sunflower, which is one of the main byproducts of the sunflower industry and has edible and medicinal values, but the research on the active substances such as phenols, flavonoids and the like contained in the sunflower head is not sufficient, and the sunflower head is often used as firewood or discarded and cannot be effectively utilized.
The sunflower head powder particles prepared from the sunflower heads reported at present contain components with the functions of diminishing inflammation, reducing swelling, reducing uric acid and relieving pain, such as total flavonoids, sunflower head alkaloids, polysaccharides and the like, so that gout can be effectively prevented and treated.
Scopoletin, also known as scopoletin (scopoletin), scopoletin and scopoletin, belongs to coumarin compounds and has a chemical name of 6-methoxy-7-hydroxycoumarin. Scopoletin is widely distributed in plants, and has high content in plants such as Erycibe obtusifolia and Erycibe obtusifolia belonging to Convolvulaceae, Artemisia annua and Artemisia capillaris belonging to Compositae, Angelica dahurica belonging to Umbelliferae, and Morinda citrifolia belonging to Rubiaceae. Scopoletin has various pharmacological activities of resisting tumor, resisting inflammation, reducing blood sugar, reducing blood pressure, resisting neurodegenerative diseases and the like.
At present, the preparation of scopoletin mainly comprises synthesis and extraction, and the common extraction raw materials are tobacco leaves, herba Erodii seu Geranii, saussurea involucrate and olive leaves, but no relevant report of extracting scopoletin from sunflower discs is found in the field; meanwhile, the existing method for extracting flavone from sunflower discs also has the defects of low extraction rate and the like. At present, a method for simultaneously extracting flavone and scopoletin from sunflower discs is lacked in the field, and the problem to be solved in the field is to simultaneously extract the flavone and the scopoletin from the sunflower discs with high efficiency.
Disclosure of Invention
Based on the above defects and needs in the art, the present invention provides a method for extracting scopoletin and total flavonoids from sunflower discs, which has the advantage of high extraction rate. The technical problem to be solved by the invention is realized by adopting the following technical scheme:
a method for extracting scopoletin and total flavonoids from sunflower discs is characterized by comprising the following steps: comprises the following steps of extracting by adopting a supercritical fluid extraction technology: extraction pressure: 26-32MPa, extraction temperature: the extraction time is 30-75min at 40-50 ℃, and the dosage proportion of entrainer is 0-1500ml per 300L of extractant.
The extraction of scopoletin and total flavone from sunflower disc with the technological parameters in the above range can obtain the effect of extraction rate of scopoletin of 97.1% and total flavone of 98.8% respectively.
The extraction pressure is selected from 26MPa, 27MPa, 28MPa, 29MPa, 30MPa, 31MPa, or 32 MPa.
The extraction temperature is selected from 40 deg.C, 41 deg.C, 42 deg.C, 42.5 deg.C, 43 deg.C, 44 deg.C, 45 deg.C, 46 deg.C, 47 deg.C, 47.5 deg.C, 48 deg.C, 49 deg.C, and 50 deg.C.
The extraction time is selected from 30min, 31min, 32min, 33min, 34min, 35min, 36min, 37min, 38min, 39min, 40min, 41min, 42min, 43min, 44min, 45min, 46min, 47min, 48min, 49min, 50min, 51min, 52min, 53min, 54min, 55min, 56min, 57min, 58min, 59min, 60min, 61min, 62min, 63min, 64min, 65min, 66min, 67min, 68min, 69min, 70min, 71min, 72min, 73min, 74min, or 75 min.
The entrainer is selected from: ethanol, methanol, acetone, n-hexane;
preferably the extractant is CO2
According to the invention, whether the entrainer is added or not and the influence of the addition amount of the entrainer on the experimental result are examined through experimental data. The result shows that the extraction rate of the scopoletin and the flavone can be improved by adding the entrainer as the entrainer; considering that the sunflower disc extract can be further developed as a raw material of food, health food, medicine and the like, ethanol is preferred in the invention to meet the requirements of the food and the health food on the raw material.
CO2Is the most commonly used extractant of supercritical fluid extraction technology and has the advantage of CO2Is an inactive gas, does not generate chemical reaction in the extraction process, belongs to a non-combustible gas, and has no smell, no odor, no toxicity, good safety and the like. Other extractants are rare in practical use.
The method for extracting scopoletin and total flavonoids from sunflower discs further comprises the step of processing the raw materials of the sunflower discs before extraction.
The raw material processing refers to crushing and low-temperature drying of sunflower discs.
The drying means that the water content of the crushed sunflower discs is below 5%.
According to the inventor's experience, the lower the moisture content of the material, the more beneficial the extraction. The extraction rate of the extract is improved, and the extraction pertinence of the lipophilic target is improved, which is shown in that the extraction rate of the lipophilic target is improved (both scopoletin and flavonoid aglycone belong to lipophilic target), so that the extraction rate of scopoletin and flavonoid substances can be effectively improved by controlling the water content of the sunflower disc raw material to be less than 5%.
The extraction method of the invention has the following calculation process of the extraction rate of scopoletin:
the content of scopoletin in the sunflower disc raw material is 0.0052%, which means that 100g of the sunflower disc raw material contains 0.0052g (i.e. 5.2mg) of scopoletin;
the content of total flavone in the raw material of the sunflower disc is 39.4mg/100g, which means that the raw material of the sunflower disc contains 39.4mg of scopoletin in 100g of the raw material of the sunflower disc;
the content of scopoletin in the extract obtained by extracting the sunflower disc with the supercritical fluid is 0.069 percent, which means that the extract obtained by extracting 100g of the sunflower disc with the supercritical fluid contains 0.069g (69 mg) of scopoletin;
subjecting the sunflower disc to supercritical fluid extraction to obtain extract with total flavone content of 532mg/100g, which means that the extract obtained after subjecting 100g of sunflower disc to supercritical fluid extraction contains 532mg of total flavone;
mass m is taken1The content of scopoletin in the raw material of the sunflower disc is detected to be 0.0052 percent, so the raw material of the sunflower disc contains m2(m2=0.0052%*m1) Scopoletin of (1). The sunflower disc raw material is extracted by supercritical fluid technology to obtain the sunflower disc raw material with mass m3The content of scopoletin in the sunflower disc extract is detected to be 0069%, so the sunflower disc extract should contain m4(m4=0.069%*m3) Scopoletin of (1).
The extraction rate of the sunflower disc extract is m3/m1
The extraction rate of scopoletin from sunflower disc is m4/m2
The extraction rate of total flavonoids is calculated in the same way as scopoletin.
In conclusion, the invention has the beneficial effects that:
according to the analysis of the obtained test data, the optimized optimal process comprises the following steps: the optimum process is that the extraction pressure is 26-32MPa, the extraction temperature is 40-50 ℃, the extraction time is 30-75min, and the proportion of ethanol entrainer is 0-1500 mL/300L/h.
Under the process condition, the extraction rates of the scopoletin and the total flavonoids in the sunflower disc can respectively reach: 97.1 percent and 98.8 percent, basically realizing the complete extraction of the scopoletin and the total flavone in the sunflower disc, wherein the content of the scopoletin and the total flavone in the extract is respectively 0.069 percent (69mg/100g, which means that each 100g of the extract contains 69mg of scopoletin) and 0.532 percent (532mg/100g, which means that each 100g of the extract contains 532mg of scopoletin).
Detailed Description
The present invention is further illustrated below with reference to specific examples, which are intended to be illustrative only and not to limit the scope of the invention.
The reagents and raw materials adopted in the embodiment of the invention can be obtained commercially.
The following table 1 of the present invention shows specific reaction parameters and corresponding extraction effects of the supercritical fluid extraction technology used in the method for extracting scopoletin and total flavonoids from sunflower discs according to some specific examples of the present invention:
TABLE 1
Figure BDA0002406245180000031
Figure BDA0002406245180000041
Figure BDA0002406245180000051
As can be seen from table 1 above, the following process parameters were used: the extraction pressure is 26-32MPa, the extraction temperature is 40-50 ℃, the extraction time is 30-75min, and the proportion of ethanol entrainer is 0-1500mL/300L/h, so that the scopoletin and the total flavone can be efficiently extracted from the sunflower disc, the extraction rates of the scopoletin and the total flavone are respectively higher than 95.5% and 96.9%, the highest extraction rate of the scopoletin can reach 98.2%, and the extraction rate of the total flavone is 99.1%.
The present invention illustrates a part of the experimental procedures for determining the optimum reaction parameters according to the present invention by the following experimental examples:
experimental examples, part of the Experimental procedures of the present invention
1. Raw materials
Pulverizing receptaculum Helianthi, and drying at low temperature until water content is below 5%.
The scopoletin reference substance and the rutin reference substance (provided by Chinese food and drug identification research institute) are purchased.
2. Extraction method
The method comprises the steps of taking about 5 kg of sunflower disc raw materials, and researching supercritical fluid extraction technologies such as extraction pressure, extraction temperature, extraction time, ethanol entrainer proportion and the like by adopting a single-factor test method to obtain extracts under different processes.
The set levels of the extraction pressure parameters are 26, 28, 30 and 32 MPa.
The extraction temperature parameters are set at levels of 40, 42.5, 45, 47.5 and 50 ℃.
The extraction time parameter setting levels are 30, 45, 60 and 75 min.
The setting level of the ethanol entrainer proportion parameter is 0, 500, 1000, 1500ml/300L/h (EtOH/CO)2/h)。
Recording the extraction rate of the extract under each extraction process, and measuring the content of scopoletin and total flavonoids in each extract and the sunflower disc raw material.
In addition to the specific reaction parameter conditions of the present invention described above, the specific procedures and equipment used in connection with the supercritical fluid extraction techniques of the present invention are those known to those skilled in the art, for example, the procedures and equipment described in patent application 201510055248.2.
3. Scopoletin content determination
The measurement is carried out according to the standard operating procedure of high performance liquid chromatography test for scopoletin in Chinese pharmacopoeia.
Octadecylsilane chemically bonded silica is used as a filler in chromatographic conditions and system applicability tests; methanol-0.3% phosphoric acid solution (30:70) is used as a mobile phase; the detection wavelength was 344 nm. The theoretical plate number is not less than 4000 in terms of scopoletin peak.
Preparation of control solutions: taking a proper amount of scopoletin reference substance, precisely weighing, and adding methanol to prepare a solution containing 16 mug of scopoletin per 1 mL.
Preparation of a test solution: weighing about 0.5g of the powder (passing through a third sieve), precisely weighing, placing in a conical flask with a plug, precisely adding 25mL of methanol, sealing the plug, weighing, standing for l hours, shaking constantly, ultrasonically treating (with the power of 300W and the frequency of 40kHz) for 1 hour, cooling, weighing again, supplementing the lost weight with methanol, shaking uniformly, and filtering. And taking the subsequent filtrate to obtain the final product.
The determination method comprises the following steps: precisely sucking 10 μ L of each of the reference solution and the sample solution, and injecting into a liquid chromatograph for measurement. The content of scopoletin was calculated as dry product.
4. Determination of total flavone content
Weighing 0.5g (liquid sample 5mL) of sample, adding 70% ethanol, heating in 60 deg.C water bath for 60min, taking out, cooling, diluting to 25mL, standing, sucking 1.0mL of supernatant, adding 1g of polyamide powder in an evaporation dish, adsorbing, volatilizing ethanol in water bath, and transferring to a chromatographic column. The evaporation dish is washed by methanol, and the solution is transferred to a chromatographic column for elution, washed to about 100mL, and subjected to constant volume. The absorbance of this solution was measured at a wavelength of 360 nm. And simultaneously, measuring a standard curve by using rutin as a standard substance, solving a regression equation, and calculating the content of the total flavonoids in the sample.
5. Best process repeatability test
From four single-factor tests of extraction pressure, extraction temperature, extraction time, proportion of ethanol entrainer and the like, and taking the extraction rate of scopoletin and total flavonoids as indexes, the test result shows that the optimal process is that the extraction pressure is 26-32MPa, the extraction temperature is 40-50 ℃, the extraction time is 30-75min, the proportion of the ethanol entrainer is 0-1500mL/300L/h, and the expression is that the amount of the entrainer added per 300L of the extractant per hour is 0-1500 mL. And (5) extracting and re-testing the sunflower disc raw material according to the process parameters.
TABLE 2 extraction of scopoletin and total flavonoids in optimal process
Figure BDA0002406245180000061
Figure BDA0002406245180000071
The extraction pressure is studied by adopting a single-factor test method under the process parameters of extraction temperature of 45 ℃, extraction time of 60min and ethanol entrainer ratio of 0:
TABLE 3 Effect of extraction pressure on extraction of scopoletin
Pressure of extraction Extraction rate of the extract The extract contains scopoletin Extraction rate of scopoletin
26MPa 5.18% 0.030% 29.9%
28MPa 5.43% 0.039% 40.7%
30MPa 6.09% 0.048% 56.3%
32MPa 6.64% 0.057% 72.8%
Note: the content of scopoletin in the raw material is 0.0052%
TABLE 4 Effect of extraction pressure on Total Flavonoids extraction
Pressure of extraction Extraction rate of the extract The total flavone content in the extract Extraction rate of total flavone
26MPa 5.18% 502mg/100g 66.0%
28MPa 5.43% 551mg/100g 76.0%
30MPa 6.09% 516mg/100g 79.8%
32MPa 6.64% 536mg/100g 90.3%
Note: the total flavone content in the raw material is 39.4mg/100g
According to the experimental data, the extraction rates of the scopoletin and the total flavone are the highest, namely 72.8% and 90.3% respectively when the extraction pressure is 32 MPa.
The extraction temperature is researched by adopting a single-factor test method under the process parameters of 30Mpa of extraction pressure, 60min of extraction time and 0 proportion of ethanol entrainer:
TABLE 5 influence of extraction temperature on extraction of scopoletin
Temperature of extraction Extraction rate of the extract The extract contains scopoletin Extraction rate of scopoletin
40℃ 5.08% 0.031% 30.3%
42.5℃ 5.24% 0.036% 36.3%
45℃ 6.09% 0.048% 56.3%
47.5℃ 6.01% 0.043% 49.7%
50℃ 6.44% 0.040% 49.5%
Note: the content of scopoletin in the raw material is 0.0052%.
TABLE 6 influence of extraction temperature on the extraction of Total Flavonoids
Figure BDA0002406245180000072
Figure BDA0002406245180000081
Note: the total flavone content in the raw material is 39.4mg/100 g.
According to the test data, when the extraction temperature is 45 ℃, the extraction rate of the scopoletin is the highest and is 56.3 percent; when the extraction temperature is 50 ℃, the extraction rate of the total flavone is the highest and is 86.7 percent.
The extraction time is studied by adopting a single-factor test method under the process parameters of 30Mpa of extraction pressure, 45 ℃ of extraction temperature and 0 proportion of ethanol entrainer:
TABLE 7 Effect of extraction time on extraction of scopoletin
Time of extraction Extraction rate of the extract The extract contains scopoletin Extraction rate of scopoletin
30min 3.23% 0.039% 24.2%
45min 5.88% 0.041% 46.4%
60min 6.09% 0.048% 56.3%
75min 6.45% 0.055% 68.2%
Note: the content of scopoletin in the raw material is 0.0052%
TABLE 8 Effect of extraction time on Total Flavonoids extraction
Time of extraction Extraction rate of the extract The total flavone content in the extract Extraction rate of total flavone
30min 3.23% 547mg/100g 44.8%
45min 5.88% 518mg/100g 77.3%
60min 6.09% 516mg/100g 79.8%
75min 6.45% 510mg/100g 83.4%
Note: the total flavone content in the raw material is 39.4mg/100g
According to the test data, when the extraction time is 75min, the extraction rates of the scopoletin and the total flavone are the highest, namely 68.2% and 83.4% respectively.
The ethanol entrainer is researched by adopting a single-factor test method under the process parameters of 30Mpa of extraction pressure, 45 ℃ of extraction temperature and 60min of extraction time:
TABLE 9 influence of ethanol entrainer on extraction of scopoletin
Figure BDA0002406245180000082
Figure BDA0002406245180000091
Note: the content of scopoletin in the raw material is 0.0052%
TABLE 10 influence of ethanol entrainer on extraction of Total Flavonoids
Proportion of ethanol entrainer Extraction rate of the extract The total flavone content in the extract Extraction rate of total flavone
0 6.09% 516mg/100g 79.8%
500mL/300L/h 6.51% 521mg/100g 86.1%
1000mL/300L/h 7.36% 511mg/100g 95.4%
1500mL/300L/h 7.06% 551mg/100g 98.8%
Note: the total flavone content in the raw material is 39.4mg/100g
According to experimental data, when the proportion of the ethanol entrainer is 1500mL/300L/h, the extraction rates of the scopoletin and the total flavone are highest, and are 69.2% and 98.8% respectively.

Claims (8)

1. A method for extracting scopoletin and total flavonoids from sunflower discs is characterized by comprising the following steps: comprises the following steps of extracting by adopting a supercritical fluid extraction technology: extraction pressure: 26-32MPa, extraction temperature: the extraction time is 30-75min at 40-50 ℃, and the dosage proportion of entrainer is 0-1500ml per 300L of extractant.
2. The method of claim 1, wherein the extraction of scopoletin and total flavonoids from sunflower discs comprises: the extraction pressure is selected from 26MPa, 27MPa, 28MPa, 29MPa, 30MPa, 31MPa, or 32 MPa.
3. The method of claim 1, wherein the extraction of scopoletin and total flavonoids from sunflower discs comprises: the extraction temperature is selected from 40 deg.C, 41 deg.C, 42 deg.C, 42.5 deg.C, 43 deg.C, 44 deg.C, 45 deg.C, 46 deg.C, 47 deg.C, 47.5 deg.C, 48 deg.C, 49 deg.C, and 50 deg.C.
4. The method of claim 1, wherein the extraction of scopoletin and total flavonoids from sunflower discs comprises: the extraction time is selected from 30min, 31min, 32min, 33min, 34min, 35min, 36min, 37min, 38min, 39min, 40min, 41min, 42min, 43min, 44min, 45min, 46min, 47min, 48min, 49min, 50min, 51min, 52min, 53min, 54min, 55min, 56min, 57min, 58min, 59min, 60min, 61min, 62min, 63min, 64min, 65min, 66min, 67min, 68min, 69min, 70min, 71min, 72min, 73min, 74min, or 75 min.
5. The method of claim 1, wherein the extraction of scopoletin and total flavonoids from sunflower discs comprises: the entrainer is selected from: ethanol, methanol, acetone, n-hexane;
preferably the extractant is CO2
6. The method for extracting scopoletin and total flavonoids from sunflower discs according to any one of claims 1 to 5, wherein the method comprises the following steps: also comprises processing the sunflower disc before extraction.
7. The method of claim 6, wherein the extraction of scopoletin and total flavonoids from sunflower discs comprises: the raw material processing refers to crushing and low-temperature drying of sunflower discs.
8. The method of claim 7, wherein the extraction of scopoletin and total flavonoids from sunflower discs comprises: the drying means that the water content of the crushed sunflower discs is below 5%.
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