CN105859905A - Extracting method for konjac glucomannan - Google Patents
Extracting method for konjac glucomannan Download PDFInfo
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- CN105859905A CN105859905A CN201610400993.0A CN201610400993A CN105859905A CN 105859905 A CN105859905 A CN 105859905A CN 201610400993 A CN201610400993 A CN 201610400993A CN 105859905 A CN105859905 A CN 105859905A
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- rhizoma amorphophalli
- amorphophalli glucomannan
- glucomannan
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- konjac
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B37/00—Preparation of polysaccharides not provided for in groups C08B1/00 - C08B35/00; Derivatives thereof
- C08B37/006—Heteroglycans, i.e. polysaccharides having more than one sugar residue in the main chain in either alternating or less regular sequence; Gellans; Succinoglycans; Arabinogalactans; Tragacanth or gum tragacanth or traganth from Astragalus; Gum Karaya from Sterculia urens; Gum Ghatti from Anogeissus latifolia; Derivatives thereof
- C08B37/0087—Glucomannans or galactomannans; Tara or tara gum, i.e. D-mannose and D-galactose units, e.g. from Cesalpinia spinosa; Tamarind gum, i.e. D-galactose, D-glucose and D-xylose units, e.g. from Tamarindus indica; Gum Arabic, i.e. L-arabinose, L-rhamnose, D-galactose and D-glucuronic acid units, e.g. from Acacia Senegal or Acacia Seyal; Derivatives thereof
- C08B37/009—Konjac gum or konjac mannan, i.e. beta-D-glucose and beta-D-mannose units linked by 1,4 bonds, e.g. from Amorphophallus species; Derivatives thereof
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B37/00—Preparation of polysaccharides not provided for in groups C08B1/00 - C08B35/00; Derivatives thereof
- C08B37/0003—General processes for their isolation or fractionation, e.g. purification or extraction from biomass
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- Chemical Kinetics & Catalysis (AREA)
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- Polysaccharides And Polysaccharide Derivatives (AREA)
- Jellies, Jams, And Syrups (AREA)
- Preparation Of Fruits And Vegetables (AREA)
Abstract
The invention discloses the technical field of konjac production, and particularly relates to an extracting method for konjac glucomannan. The method comprises the steps that fresh konjac corm is cleaned, and roots, buds and peel are removed; the peeled konjac is cut into slices and placed into a phosphorus tribromide water solution to be soaked for 2-4 d; then, the soaked sliced konjac is ground into a sizing agent, water is added into the sizing agent and stirred till no flocculent precipitates are generated, then, standing is performed for 6 h or longer, bottom precipitates are removed, and a konjac glucomannan water solution is obtained; finally, ethyl alcohol is added into the konjac glucomannan water solution and stirred till no precipitates are generated, a konjac glucomannan ethyl alcohol solution is obtained, the konjac glucomannan ethyl alcohol solution is subjected to vacuum filtration to obtain konjac glucomannan precipitates, ethyl alcohol is used for washing the obtained high-purity konjac glucomannan. According to the extracting method, konjac glucomannan is adopted, water and ethyl alcohol are reasonably used, and the purposes of improving the extraction rate of the konjac glucomannan and keeping the original structure are achieved.
Description
Technical field
The invention belongs to Rhizoma amorphophalli production and processing technical field, particularly to the extracting method of a kind of Rhizoma amorphophalli glucomannan.
Background technology
Rhizoma amorphophalli is the tuber of Araeceae herbaceos perennial, widely distributed in China, and Main Cultivation carries in the west and south and the middle and lower reach of Yangtze River one, and resource is the abundantest.Rhizoma amorphophalli is useful basic food, the people too much to edible animal acid food, and Rhizoma amorphophalli is eaten in collocation, can reach food acid, soda balance.Additionally, Rhizoma amorphophalli also have horizontal blood sugar lowering, blood fat reducing, blood pressure lowering, dissipate poison, skin care, promote blood circulation, lose weight, relieving constipation, appetizing etc. multi-functional.Fresh konjak is oblate spheroid tuber, is typically processed into konjaku powder and uses.Thinly slice after konjac tuber is removed the peel, dry in the grinder that one speed of laggard people is the lowest and carry out comminution by gas stream, when the linear velocity of hammer leaf reaches 65 ~ 85m/s, the particle not impact resistances such as starch, quickly it is ground into the dust of below 10 mesh, impact-resistant konjaku powder is very big with the density difference of starch, is removed the compositions such as starch by selecting crude drugs with winnower and obtains konjaku powder.The main component of konjaku powder is Rhizoma amorphophalli glucomannan, it has good water-retaining property, gelling, thickening property, film property, hyperlipidemia, hypertension, diabetes, obesity etc. there is good preventive and therapeutic action, and have certain anti-cancer effect, it is used widely at food preservation, food processing field.
The extracting mode predominantly organic tool method of glucomannoglycan and wet method two kinds.Dry process is exactly that fresh konjak corm is processed into taro gusset plate, carrys out purification by wind after grinding to form konjac meal, and the konjac meal rugosity so obtained is the highest, is only to be applied in field of food with the cheapest price.Wet method mainly has lead salt precipitation, complexometry, presses down enzymatic degradation method, ethanol precipitation etc., and wherein lead salt precipitation is to utilize the defat of konjaku powder elder generation, then extracts with weak base, then neutralizes with acid, next with Pb(AC) 2 precipitations, then add ethanol precipitation；Such extracting mode can make the content of Rhizoma amorphophalli glucomannan in konjak glucomannan fine powder be up to 95%; but the method is owing to employing alkali in pretreatment process; therefore part konjak portuguese gansu polyose glycan molecule deacetylation is caused; so that the chemical constitution of Rhizoma amorphophalli glucomannan there occurs change; konjak portuguese gansu polyose sugar derivatives degree of crystallinity after this structural change becomes big; vitrification point changes, Rhizoma amorphophalli glucomannan water solublity completely without；Meanwhile, Rhizoma amorphophalli glucomannan introduces heavy metal, so, Rhizoma amorphophalli glucomannan cannot be applied in the application field of food that it is originally maximum.
Summary of the invention
The invention is intended to provide the extracting method of a kind of Rhizoma amorphophalli glucosides polysaccharide, to solve in lead salt precipitation because using alkali to cause when pre-treatment, cause Rhizoma amorphophalli glucomannan chemical constitution to change and during Rhizoma amorphophalli glucomannan extracts, introduce heavy metal, causing the problem that Rhizoma amorphophalli glucomannan cannot be applied at field of food.
The extracting method of a kind of Rhizoma amorphophalli glucomannan in this programme, specifically includes following steps:
(1) fresh konjak corm is carried out, and removes root, bud, skin；
(2) Rhizoma amorphophalli after peeling cut into slices and put into immersion 2 ~ 4 days in folded ammonia sodium water solution；
(3) slice food made from Amorphophallus rivieri after soaking grinds to form serosity, adds water and stirs, continue the stirring that adds water after there is flocculent deposit in serosity, until not having flocculent deposit, then standing more than 6 hours, removing bottom precipitation, obtaining konjak portuguese gansu polyose sugar aqueous solution；
(4) in konjak portuguese gansu polyose sugar aqueous solution, add ethanol and stir, generate flocculent deposit, continuously add ethanol until no longer producing precipitation, obtain Rhizoma amorphophalli glucomannan ethanol solution, Rhizoma amorphophalli glucomannan ethanol solution is carried out filtration under diminished pressure and obtains Rhizoma amorphophalli glucomannan precipitation, precipitate with alcohol flushing Rhizoma amorphophalli glucomannan again, obtain high-purity kanjak glucomannosan.
Beneficial effects of the present invention: by cleaning and removing root, bud, skin before extracting；The foreign material such as the silt by konjak corm surface are cleaned, and clear up small holes caused by worms, the place of rotting simultaneously, improve color and luster and the purity of Rhizoma amorphophalli product.And soak 2 ~ 4 days by konjac slicing and in folded ammonia sodium water solution；Slice food made from Amorphophallus rivieri is conducive to be fully contacted with aqueous solution, the noxious substances such as the alkaloid in slice food made from Amorphophallus rivieri are made to be taken away by aqueous solution, reduce the toxicity of slice food made from Amorphophallus rivieri, and use the purpose of folded ammonia sodium to be, the microorganism of degradable Rhizoma amorphophalli glucomannan and the activity of mannase is suppressed by folded ammonia sodium, thus inhibitory enzyme degraded Rhizoma amorphophalli glucomannan, improve the extraction ratio of Rhizoma amorphophalli glucomannan.Slice food made from Amorphophallus rivieri after soaking grinds to form serosity, after dilute, stand for a long time, make the water-fast macromolecular substances such as starch be able under bottom precipitation, and Rhizoma amorphophalli glucomannan is dissolved in water, after being taken out by bottom precipitation, obtain the purest konjak portuguese gansu polyose sugar aqueous solution.A large amount of ethanol is added in konjak portuguese gansu polyose sugar aqueous solution, konjak portuguese gansu polyose sugar aqueous solution is constantly diluted, when ethanol reach a certain amount of after, Rhizoma amorphophalli glucomannan does not dissolves in ethanol solution, after carrying out filtration under diminished pressure, ethanol solution has taken away the materials such as the SO2 of easy ethanol solution, and obtains Rhizoma amorphophalli glucomannan precipitation；Recycling alcohol flushing Rhizoma amorphophalli glucomannan precipitation, washes away other impurity on its surface, purifies Rhizoma amorphophalli glucomannan further.During whole extraction, it is not introduced into heavy metal substance, maintains the edibility of Rhizoma amorphophalli glucomannan, and save the integrity of Rhizoma amorphophalli glucomannan structure.
Further, the concentration of the folded ammonia sodium water solution of step (2) is 0.02 ~ 0.05%.The effect of the activity of 0.02 ~ 0.05% microorganism that can guarantee that suppression degradable Rhizoma amorphophalli glucomannan and mannase, avoids the waste of folded ammonia sodium simultaneously.
Further, step (3) repeats repeatedly, until described konjak portuguese gansu polyose sugar aqueous solution and Iod R no longer become blue.Multiple purpose is sufficiently to remove the starch in konjak portuguese gansu polyose sugar aqueous solution, improves the purity of Rhizoma amorphophalli glucomannan, and iodine chance starch change indigo plant can be as judging whether starch removes clean foundation.
Further, the stirring of step (3) uses magnetic force heating stirrer to carry out, and temperature controls, at 20 ~ 40 DEG C, to stir at least 1h the most afterwards.Use magnetic force heating stirrer, while quickly stirring, serosity can be carried out temperature control, control can to improve Rhizoma amorphophalli glucomannan at 20 ~ 40 DEG C and be dissolved in the speed of water, avoid the structure of temperature too high destruction Rhizoma amorphophalli glucomannan simultaneously；And the stirring of more than 1h is during beneficially Rhizoma amorphophalli glucomannan is completely dissolved in water.
Further, the edible ethanol that ethanol is more than 85% of step (4).Use the edible ethanol of more than 85%, it is to avoid Rhizoma amorphophalli glucomannan alcohol concentration is too low, and Rhizoma amorphophalli glucomannan is again dissolved in ethanol, use edible ethanol, it is to avoid glucomannoglycan is contaminated.
Detailed description of the invention
Below by detailed description of the invention, the present invention is further detailed explanation:
Embodiment 1:
The extracting method of a kind of Rhizoma amorphophalli glucomannan, specifically includes following steps: (1) passes through hand picking, remove rot, the Rhizoma amorphophalli of damage of going bad, have, select fresh, Rhizoma amorphophalli the most mouldy, unmetamorphosed as raw material, with clear water 3 ~ 5 times, and remove root, bud, skin；
(2) Rhizoma amorphophalli after removing the peel is cut into slices and is put into 0.03% and folds immersion 3 days in ammonia sodium water solution；
(3) slice food made from Amorphophallus rivieri after soaking grinds to form serosity, adds water and use magnetic force heating stirrer to be stirred in serosity, and temperature controls, at 30 DEG C, to stir 2h the most afterwards；Continue, after flocculent deposit occurs, the stirring that adds water, until there is no flocculent deposit, then standing 8 hours, removing bottom precipitation, obtaining konjak portuguese gansu polyose sugar aqueous solution；Use iodine liquid to react with konjak portuguese gansu polyose sugar aqueous solution, generate blueness, then the stirring that repeats to add water, stand and go the operation of precipitation, until iodine liquid and Rhizoma amorphophalli glucomannan reactant aqueous solution are not becoming blueness；
(4) in konjak portuguese gansu polyose sugar aqueous solution, add concentration to be the edible ethanol of 90% and stir, generate flocculent deposit, continuously add edible ethanol until no longer producing precipitation, obtain Rhizoma amorphophalli glucomannan ethanol solution, Rhizoma amorphophalli glucomannan ethanol solution is carried out filtration under diminished pressure and obtains Rhizoma amorphophalli glucomannan precipitation, then rinse Rhizoma amorphophalli glucomannan precipitation with edible ethanol.
Embodiment 2:
The extracting method of a kind of Rhizoma amorphophalli glucomannan, specifically includes following steps: (1) passes through hand picking, remove rot, the Rhizoma amorphophalli of damage of going bad, have, select fresh, Rhizoma amorphophalli the most mouldy, unmetamorphosed as raw material, with clear water 3 ~ 5 times, and remove root, bud, skin；
(2) Rhizoma amorphophalli after removing the peel is cut into slices and is put into 0.02% and folds immersion 4 days in ammonia sodium water solution；
(3) slice food made from Amorphophallus rivieri after soaking grinds to form serosity, adds water and use magnetic force heating stirrer to be stirred in serosity, and temperature controls, at 20 DEG C, to stir 4h the most afterwards；Continue, after flocculent deposit occurs, the stirring that adds water, until there is no flocculent deposit, then standing 9 hours, removing bottom precipitation, obtaining konjak portuguese gansu polyose sugar aqueous solution；Use iodine liquid to react with konjak portuguese gansu polyose sugar aqueous solution, generate blueness, then the stirring that repeats to add water, stand and go the operation of precipitation, until iodine liquid and Rhizoma amorphophalli glucomannan reactant aqueous solution are not becoming blueness；
(4) in konjak portuguese gansu polyose sugar aqueous solution, add concentration to be the edible ethanol of 92% and stir, generate flocculent deposit, continuously add edible ethanol until no longer producing precipitation, obtain Rhizoma amorphophalli glucomannan ethanol solution, Rhizoma amorphophalli glucomannan ethanol solution is carried out filtration under diminished pressure and obtains Rhizoma amorphophalli glucomannan precipitation, then rinse Rhizoma amorphophalli glucomannan precipitation with edible ethanol.
Embodiment 3:
The extracting method of a kind of Rhizoma amorphophalli glucomannan, specifically includes following steps: (1) passes through hand picking, remove rot, the Rhizoma amorphophalli of damage of going bad, have, select fresh, Rhizoma amorphophalli the most mouldy, unmetamorphosed as raw material, with clear water 3 ~ 5 times, and remove root, bud, skin；
(2) Rhizoma amorphophalli after removing the peel is cut into slices and is put into 0.05% and folds immersion 2 days in ammonia sodium water solution；
(3) slice food made from Amorphophallus rivieri after soaking grinds to form serosity, adds water and use magnetic force heating stirrer to be stirred in serosity, and temperature controls, at 40 DEG C, to stir 3h the most afterwards；Continue, after flocculent deposit occurs, the stirring that adds water, until there is no flocculent deposit, then standing 8 hours, removing bottom precipitation, obtaining konjak portuguese gansu polyose sugar aqueous solution；Use iodine liquid to react with konjak portuguese gansu polyose sugar aqueous solution, generate blueness, then the stirring that repeats to add water, stand and go the operation of precipitation, until iodine liquid and Rhizoma amorphophalli glucomannan reactant aqueous solution are not becoming blueness；
(4) in konjak portuguese gansu polyose sugar aqueous solution, add concentration to be the edible ethanol of 85% and stir, generate flocculent deposit, continuously add edible ethanol until no longer producing precipitation, obtain Rhizoma amorphophalli glucomannan ethanol solution, Rhizoma amorphophalli glucomannan ethanol solution is carried out filtration under diminished pressure and obtains Rhizoma amorphophalli glucomannan precipitation, then rinse Rhizoma amorphophalli glucomannan precipitation with edible ethanol.
Above-described is only embodiments of the invention, and in scheme, the known general knowledge such as concrete structure and characteristic too much describes at this.Should be understood that; for a person skilled in the art, on the premise of without departing from present configuration, it is also possible to make some deformation and improvement; these also should be considered as protection scope of the present invention, and these are all without affecting effect and the practical applicability that the present invention implements.The protection domain that this application claims should be as the criterion with the content of its claim, and the detailed description of the invention in description etc. records the content that may be used for explaining claim.
Claims (5)
1. the extracting method of a Rhizoma amorphophalli glucomannan, it is characterised in that: specifically include following steps:
(1) fresh konjak corm is carried out, and removes root, bud, skin；
(2) Rhizoma amorphophalli after peeling cut into slices and put into immersion 2 ~ 4 days in folded ammonia sodium water solution；
(3) slice food made from Amorphophallus rivieri after soaking grinds to form serosity, adds water and stirs, continue the stirring that adds water after there is flocculent deposit in serosity, until not having flocculent deposit, then standing more than 6 hours, removing bottom precipitation, obtaining konjak portuguese gansu polyose sugar aqueous solution；
(4) in konjak portuguese gansu polyose sugar aqueous solution, add ethanol and stir, generate flocculent deposit, continuously add ethanol until no longer producing precipitation, obtain Rhizoma amorphophalli glucomannan ethanol solution, Rhizoma amorphophalli glucomannan ethanol solution is carried out filtration under diminished pressure and obtains Rhizoma amorphophalli glucomannan precipitation, precipitate with alcohol flushing Rhizoma amorphophalli glucomannan again, obtain high-purity kanjak glucomannosan.
The extracting method of Rhizoma amorphophalli glucomannan the most according to claim 1, it is characterised in that: the concentration of the folded ammonia sodium water solution of step (2) is 0.02 ~ 0.05%.
The extracting method of Rhizoma amorphophalli glucomannan the most according to claim 1 and 2, it is characterised in that: step (3) repeats repeatedly, until described konjak portuguese gansu polyose sugar aqueous solution and Iod R no longer become blue.
The extracting method of Rhizoma amorphophalli glucomannan the most according to claim 3, it is characterised in that: the stirring of step (3) uses magnetic force heating stirrer to carry out, and temperature controls, at 20 ~ 40 DEG C, to stir at least 1h the most afterwards.
The extracting method of Rhizoma amorphophalli glucomannan the most according to claim 4, it is characterised in that: the edible ethanol that ethanol is concentration more than 85% of step (4).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610400993.0A CN105859905A (en) | 2016-06-08 | 2016-06-08 | Extracting method for konjac glucomannan |
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| CN201610400993.0A CN105859905A (en) | 2016-06-08 | 2016-06-08 | Extracting method for konjac glucomannan |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112979832A (en) * | 2020-12-24 | 2021-06-18 | 安徽大别山浩野魔芋科技开发有限公司 | Preparation method of konjak extract |
| CN115152973A (en) * | 2022-05-30 | 2022-10-11 | 福州三合元生物科技有限公司 | Processing method of taro food beneficial to freezing preservation |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1167116A (en) * | 1996-06-04 | 1997-12-10 | 吴万兴 | Technology of extracting Amorphophallus rivieri mannan |
| CN1869074A (en) * | 2006-05-22 | 2006-11-29 | 四川科创制药有限公司 | Production technology of glucomannan |
| CN101914167A (en) * | 2010-08-25 | 2010-12-15 | 南京泽朗医药科技有限公司 | Method for extracting giantarum polysaccharides |
-
2016
- 2016-06-08 CN CN201610400993.0A patent/CN105859905A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1167116A (en) * | 1996-06-04 | 1997-12-10 | 吴万兴 | Technology of extracting Amorphophallus rivieri mannan |
| CN1869074A (en) * | 2006-05-22 | 2006-11-29 | 四川科创制药有限公司 | Production technology of glucomannan |
| CN101914167A (en) * | 2010-08-25 | 2010-12-15 | 南京泽朗医药科技有限公司 | Method for extracting giantarum polysaccharides |
Non-Patent Citations (1)
| Title |
|---|
| 贾成禹等: ""白魔芋和花魔芋葡甘露聚糖研究"", 《生物化学杂志》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112979832A (en) * | 2020-12-24 | 2021-06-18 | 安徽大别山浩野魔芋科技开发有限公司 | Preparation method of konjak extract |
| CN115152973A (en) * | 2022-05-30 | 2022-10-11 | 福州三合元生物科技有限公司 | Processing method of taro food beneficial to freezing preservation |
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Application publication date: 20160817 |