CN109504123A - A method of utilizing microwave radiation exaraction red sorghum pigment - Google Patents
A method of utilizing microwave radiation exaraction red sorghum pigment Download PDFInfo
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- CN109504123A CN109504123A CN201811616464.XA CN201811616464A CN109504123A CN 109504123 A CN109504123 A CN 109504123A CN 201811616464 A CN201811616464 A CN 201811616464A CN 109504123 A CN109504123 A CN 109504123A
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- China
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- sorghum
- red
- microwave radiation
- microwave
- radiation exaraction
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
- C09B61/00—Dyes of natural origin prepared from natural sources, e.g. vegetable sources
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
- C09B67/00—Influencing the physical, e.g. the dyeing or printing properties of dyestuffs without chemical reactions, e.g. by treating with solvents grinding or grinding assistants, coating of pigments or dyes; Process features in the making of dyestuff preparations; Dyestuff preparations of a special physical nature, e.g. tablets, films
- C09B67/0096—Purification; Precipitation; Filtration
Abstract
The invention discloses a kind of methods using microwave radiation exaraction red sorghum pigment, specifically includes the following steps: sorghum husk is dried, crush；Smashed sorghum husk is placed in micro-wave oven with 70% ethyl alcohol immersion and carries out Microwave Extraction, obtain crude extract, above-mentioned crude extract is added again into 70% ethanol solution and is dissolved, it is concentrated, is centrifuged, dried, brown-red solid can be obtained, this method is easily operated, and selectivity is high, energy consumption and material consumption are small, extraction time is short, DNA purity is high, and does not need special separating step and the extraction of red sorghum pigment can be realized.
Description
Technical field
The invention belongs to agricultural byproducts processing technical fields, and in particular to a kind of to utilize microwave radiation exaraction red sorghum pigment
Method.
Background technique
Edible pigment is a kind of important foodstuffs additive.Since synthetic dyestuff all has different degrees of toxicity, make for a long time
With human health can be endangered, or even there is carcinogenic and teratogenesis；However natural colour is known as using non-toxic and safe, stability
Well, tone is naturally true to nature and has nutrition and medical care effect and is praised highly by people.GB2760-86 is advised according to national standards
Fixed, natural Chinese sorghum red pigment can be widely used for cooked meat product, jelly, beverage, cake color make-up, aquatic products, livestock products and plant egg
White coloring, color is naturally true to nature, non-toxic and safe, free from extraneous odour, stability are good and have nutrition, medical care effect and deep receive
It welcomes.It also plays an important role in cosmetic industry and pharmaceuticals industry natural Chinese sorghum red pigment, such as Chemistry Dept. of Jilin Univ. professor
Deodar (patent No. CN1209992A) is developed into natural Chinese sorghum red pigment non-toxic to humans with natural Chinese sorghum red pigment and contaminates
Agent is sent out, therefore development and application natural pigment is all highly important to guarantee human health and Development of Green Food industry.
China is one of world's sorghum main production country, and natural pigment sorghum red extracted from discarded sorghum rice shell, high
The main coloring material of fine strain of millet haematochrome are as follows: 5,4 '-dihydroxy isoflavone -7-0- galactosides and 5,4 '-dihydroxy -6,
8-dimethoxy isoflavones-7-0- galactoside, general name isoflavone galactoside.China is since the seventies to chrysanthemum
Research has been begun in terms of the extraction process of pigment, but is extracted red sorghum pigment from natural sorghum husk mostly at present or used
Traditional water logging and solvent extraction process.Such as patent No. N1268-0106-0039, patent No. CN1065079, the patent No.
91101637.6, patent No. CN00132678.3, patent No. 92108920 etc. extract red sorghum pigment with water seaoning；Flux extracts
Method is in<food industry science and technology>and<chemical material and environment>publication report Jin Lingfen, Wang Yimin etc. are extracted with organic solvent
Red sorghum pigment also has been reported that steam distillation and soxhlet extraction etc..But these traditional effective component extracting chrysanthemums
All there is the shortcomings that time is long, energy consumption and material consumption are big, flux dosage is big, impurity is more, low yield in the method for pigment.
Summary of the invention
In order to overcome the deficiencies of the prior art, the present invention provides a kind of method using microwave radiation exaraction red sorghum pigment,
This method is easily operated, and selectivity is high, energy consumption and material consumption are small, extraction time is short, DNA purity is high, and does not need special separation
The extraction of red sorghum pigment can be realized in step.
The purpose of the present invention is what is be achieved through the following technical solutions:
A method of using microwave radiation exaraction red sorghum pigment, specifically includes the following steps:
(1) sorghum husk is dried, is crushed；
(2) 70% ethyl alcohol of smashed sorghum husk is impregnated, the liquid-solid ratio of ethyl alcohol and sorghum husk is 40 ~ 50:1mL/g, control
Temperature is stirred 30 ~ 120 minutes at 18-25 DEG C；
(3) mixture after stirring in step (2) is placed in micro-wave oven and carries out Microwave Extraction, obtain crude extract；
(4) above-mentioned crude extract is added again into 70% ethanol solution and is dissolved, be concentrated, be centrifuged, dried, i.e.,
Brown-red solid can be obtained.
Further, the frequency of Microwave Extraction is 2450MHz in the step (3), microwave constant power is 720W, microwave
Radiated time is 1.5min.
Further, the best liquid-solid ratio of ethyl alcohol and sorghum husk is 45:1mL/g in the step (2)
Further, the mass ratio of crude extract and ethanol solution is 1:0.6 in step (4).
Further, concentrate is concentrated under reduced pressure to obtain in dissolved extracting solution at 45 DEG C in step (4), and concentrate is in revolving speed
It for 3000-4000r/min, is centrifuged 5-8 minutes, is placed in 50-60 DEG C of vacuum oven drying, water content is lower than 4%.
Beneficial effects of the present invention: the crude extract that Microwave Extraction of the present invention obtains directly dissolved with ethyl alcohol after concentration, from
The heart, drying, save extractant, and extraction time is short, and the red sorghum pigment recovery rate made is high.
Microwave Extraction red sorghum pigment step of the present invention is easy, and easily operated, extraction time is short, and purity is high, energy consumption is few, and
Not needing special separating step can be realized the extraction of red sorghum pigment 98%.
Specific embodiment
Technical solutions according to the invention are clearly and completely described below in conjunction with embodiment, it is clear that described
Embodiment be only a part of the embodiments of the present invention, instead of all the embodiments, based on the embodiments of the present invention, this
Field those of ordinary skill every other embodiment obtained without creative efforts, belongs to the present invention
The range of protection.
Embodiment: it will clean, drying, the sorghum husk 100g ground, be placed in 10 L extractor, 45 times of solids are added
Volume fraction be 70%, the ethyl alcohol flux 4500mL of pH=2, be stirred 40 minutes, select microwave frequency for 2450MHz, fixation
Microwave power is 720W, radiated time 1.5min, obtains crude extract, then with after the ethyl alcohol dissolution of volume ratio 70%, depressurize at 45 DEG C
It is concentrated to give concentrate, concentrate is 3000-4000r/min in revolving speed, is centrifuged 5-8 minutes, is placed in 50-60 DEG C of vacuum oven and dries
Dry, drying can obtain brownish red with 15.03 g of metallic luster solid product, recovery rate 15.03%.
Comparative example:
The sorghum husk 10g of crushing is placed in Soxhlet extractor, it is 70%, the acid ethanol solution of PH=2 that volume fraction, which is added,
1000mL(liquid-solid ratio is 100:1 mL/g), 75 DEG C of extraction temperature, extraction time 240min, collect extracting solution, centrifugation, mistake
Filter is concentrated under reduced pressure extracting solution, obtains crude extract, then with volume ratio is ethyl alcohol: gasoline=70:30 mixed liquor 4kg uses conventional method
In room temperature extract 4h, be concentrated through separatory funnel liquid separation, and with 70% ethyl alcohol dissolve after, then separate, be concentrated, be dried under reduced pressure can
Obtaining brownish red has 0.55 g of metallic luster solid product, recovery rate 5.5%.
It is tested from above-mentioned two, the present invention has material consumption less energy consumption, extraction time compared with traditional soxhlet extraction
It is short, recovery rate is high, operating process is easy, flux dosage is few, waste liquid discharging amount reduce 80%-90%, microwave assisted extraction sorghum
Red be known as it is time saving, quick, energy saving, save the features such as flux, belong to novel modern separation process for cleanly preparing.
Claims (4)
1. a kind of method using microwave radiation exaraction red sorghum pigment, which is characterized in that specifically includes the following steps:
(1) sorghum husk is dried, is crushed；
(2) 70% ethyl alcohol of smashed sorghum husk is impregnated, the liquid-solid ratio of ethyl alcohol and sorghum husk is 40 ~ 50:1mL/g, control
Temperature is stirred 30 ~ 120 minutes at 18-25 DEG C；
(3) mixture after stirring in step (2) is placed in micro-wave oven and carries out Microwave Extraction, obtain crude extract；
(4) above-mentioned crude extract is added again into 70% ethanol solution and is dissolved, be concentrated, be centrifuged, dried, i.e.,
Brown-red solid can be obtained.
2. a kind of method using microwave radiation exaraction red sorghum pigment according to claim 1, which is characterized in that described
The frequency of Microwave Extraction is 2450MHz in step (3), microwave constant power is 720W, microwave irradiation time 1.5min.
3. a kind of method using microwave radiation exaraction red sorghum pigment according to claim 1, which is characterized in that described
The best liquid-solid ratio of ethyl alcohol and sorghum husk is 45:1mL/g in step (2)
A kind of method using microwave radiation exaraction red sorghum pigment according to claim 1, which is characterized in that step
(4) mass ratio of crude extract and ethanol solution is 1:0.6 in.
4. a kind of method using microwave radiation exaraction red sorghum pigment according to claim 1, which is characterized in that step
(4) concentrate is concentrated under reduced pressure to obtain in dissolved extracting solution at 45 DEG C in, and concentrate is 3000-4000r/min, centrifugation in revolving speed
5-8 minutes, it is placed in 50-60 DEG C of vacuum oven drying, water content is lower than 4%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811616464.XA CN109504123A (en) | 2018-12-28 | 2018-12-28 | A method of utilizing microwave radiation exaraction red sorghum pigment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811616464.XA CN109504123A (en) | 2018-12-28 | 2018-12-28 | A method of utilizing microwave radiation exaraction red sorghum pigment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109504123A true CN109504123A (en) | 2019-03-22 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811616464.XA Pending CN109504123A (en) | 2018-12-28 | 2018-12-28 | A method of utilizing microwave radiation exaraction red sorghum pigment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109504123A (en) |
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2018
- 2018-12-28 CN CN201811616464.XA patent/CN109504123A/en active Pending
Non-Patent Citations (2)
| Title |
|---|
| 张海容 等: "高粱红色素萃取方法的研究", 《食品科学》 * |
| 王金亭: "天然高粱红色素研究与应用进展", 《粮食与油脂》 * |
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Application publication date: 20190322 |
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| RJ01 | Rejection of invention patent application after publication |