CN104642614B - A kind of reduction instant tea includes the method for the heavy metal ion content including arsenic, lead - Google Patents
A kind of reduction instant tea includes the method for the heavy metal ion content including arsenic, lead Download PDFInfo
- Publication number
- CN104642614B CN104642614B CN201510126839.4A CN201510126839A CN104642614B CN 104642614 B CN104642614 B CN 104642614B CN 201510126839 A CN201510126839 A CN 201510126839A CN 104642614 B CN104642614 B CN 104642614B
- Authority
- CN
- China
- Prior art keywords
- tea
- heavy metal
- instant tea
- lead
- metal ion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
- Fats And Perfumes (AREA)
Abstract
The present invention relates to one kind to reduce arsenic in instant tea, the method of the heavy metal ion contents such as lead, tealeaves is extracted, centrifugation, filtering, the techniques such as concentration are prepared into the concentrate that mass concentration is 5 15%, by concentrate by loading the resin column Adsorption of Tea Polyphenols of the macroporous absorbent resins of LX 8, post liquid is crossed again by loading chelating resin LSA 100 resin column arsenic-adsorbing, the heavy metal ion such as lead, collect the eluent of the resins of LX 8 and the post liquid excessively of the resins of LSA 100, it is well mixed, concentrated again, dry can and the relatively low instant tea powder of content of beary metal is prepared.The removal efficiency of the heavy metal ion such as arsenic, lead reaches 50% in the instant tea powder obtained using present invention processing, Tea Polyphenols loss late is less than 5%, its is easy to operate, the product of preparation maximally retains original quality of instant tea, heavy metal removing positive effect, the raw material limitation of production instant tea is broken through, expands raw material range of choice, improves the security and the market competitiveness of instant tea product.
Description
Technical field
The present invention relates to tea comprehensive processing quality and safety control field, and in particular to one kind reduce instant tea include arsenic,
The method of heavy metal ion content including lead.
Background technology
Heavy metal ion in tealeaves mainly has lead（Pb）, arsenic（As）, copper（Cu）, cadmium（Cd）, mercury（Hg）, chromium（Cr）Deng,
In recent years, because the pollution of Tea planting environment and process of manufacture, tealeaves are asked because of the quality of the exceeded initiation of content of beary metal
To inscribe more and more, for these heavy metals if arsenic, lead, cadmium, mercury etc. are not needed for vital movement, excess intake can influence health,
Increasing tealeaves importer improves the limit index of tealeaves content of beary metal, the content of beary metal problem of tealeaves shadow
Ring the outlet to China's tealeaves；China is as a production of instant tea big country, in the feelings that the heavy metal pollution of tealeaves is on the rise
Under condition, the heavy metals exceeding standard problem in production of instant tea also happens occasionally, therefore, the control of heavy metal in tealeaves and production of instant tea
Problem processed is increasingly taken seriously.China's solid beverage national standard has clear and definite limitation, respectively 1.0mg/ to lead and total arsenic
Kg and 0.5mg/kg, the instant tea of domestic some raw materials production can not reach such index, therefore how fast, safely
The heavy metal ion such as arsenic, lead in instant tea is removed or reduced, instant tea is reached the standard of safe handling, except controlling tea raw material
Outside, it can also be realized by processing.
The correlative study for removing heavy metal arsenic at present is concentrated mainly on two aspects of sewage disposal and the purification of running water, its
Ion exchange methods are a kind of higher dearsenicating methods of efficiency, successively reported in recent years both at home and abroad with activated carbon exchanger resin,
Regenerating resin, inorganic ions exchanger resin and selective chelating resin of sulfide etc. handle arsenic-containing waste water, particularly chelating tree
Fat adsorption technology is widely used in removing the heavy metal ion in the liquids such as water, wine.And in domestic and foreign literature, it is few right
Heavy metal adsorption and the report of separation in tea extraction, resin rational, safety, not influenceing instant tea flavor is found to locate
Heavy metals exceeding standard problem in instant tea is managed, there is important reality to anticipate quality and safety of tea control and deep processing application field
Justice.
The content of the invention
It is an object of the invention to provide a kind of instant tea that reduces to include the side of the heavy metal ion content including arsenic, lead
Method, for solving the problems, such as that heavy metal is higher or exceeded in existing instant tea, the security of instant tea is improved, it is instant so as to improve
The market competitiveness of tea product.
To achieve the above object, the present invention uses following technical scheme：
A kind of reduction instant tea includes the method for the heavy metal ion content including arsenic, lead, and it comprises the following steps：
1. it is 5-15%'s by extracting, centrifuge, filter, being prepared after concentration technology mass concentration using tealeaves as raw material
Tea concentrate；
2. by above-mentioned steps 1. obtained tea concentrate at normal temperatures by the resin column equipped with LX-8 macroporous absorbent resins,
The volume ratio of the tea concentrate and LX-8 macroporous absorbent resins is 10-30：1, the flow velocity of permeate is after adjusting resin adsorption
1-3BV/h, collected post liquid A, then again by the use of 40% edible alcohol as adsorbing on elution LX-8 macroporous absorbent resins
Tea Polyphenols, to elute flow velocity be 1-3BV/h for regulation, stops elution when to elution volume be 3-6BV, collection eluent, by
Eluent is evaporated to obtain tea liquid B, and recovered alcohol；
3. by above-mentioned steps, 2. middle collection crosses post liquid A at normal temperatures by the resin column equipped with LSA-100 chelating resins,
The volume ratio for crossing post liquid A and LSA-100 chelating resins is 10-30：1, the flow velocity of permeate is 1- after adjusting resin adsorption
3BV/h, collected post liquid C；
4. by above-mentioned steps 2. in tea liquid B and step 3. in the post liquid C of crossing merge and mix, concentrated, be concentrated into molten
Liquid soluble solid content is 10-30%, is then dried again, and the instant tea powder of low-heavy metal content is made.
The step 2. in LX-8 macroporous absorbent resins be loaded on by wet method after pretreatment in chromatographic column, first with 95%
Ethanol rinse, use redistilled water elution instead after eluate clarification, be washed till without obvious ethanol smell.
The step 3. in LSA-100 chelating resins be loaded on by wet method after pretreatment in chromatographic column, first with 95% second
Alcohol elutes, and uses redistilled water elution instead after eluate clarification, is washed till without obvious ethanol smell.
The step 4. in concentration for be concentrated by evaporation or film concentration.
Described is evaporated to rotary evaporation in vacuo.
The present invention uses above technical scheme, first passes through LX-8 macroporous absorbent resin Adsorption of Tea Polyphenols, then pass through LSA-100
Chelating resin removes heavy metal ion, the advantage is that：Using the arsenic in the removing of resin adsorption technology or reduction instant tea, lead etc.
Heavy metal ion, beneficiation technologies of the macroreticular resin to Tea Polyphenols are combined, quality and the tea for retaining tea extract to greatest extent are more
Phenol content, to macroreticular resin cross post liquid reuse chelating resin absorption, such chelating resin can effectively adsorb heavy metal from
Son and the absorption to tea active ingredient is relatively fewer；And without using macroreticular resin, only adsorbed using chelating resin, finally processed
The content of beary metal of the instant tea come can also decline, but polyphenol content declines more than 25%, and product quality is affected.This hair
Bright heavy metal removing positive effect can make content of beary metal in instant tea decline 50%, and polyphenol content declines below 5%,
The security of instant tea can be effectively improved, and the quality comparison of instant tea is smaller, method of the invention is by Tea Polyphenols process of enriching
It is combined with removing heavy-metal technique, on the premise of instant tea flavor and active ingredient is not influenceed, reaching reduces heavy metal arsenic, lead
Purpose, its is easy to operate, and the product of preparation maximally retains original quality of instant tea, heavy metal removing positive effect, dashes forward
The raw material limitation of broken production instant tea, expands raw material range of choice, can significantly improve security and the market of instant tea product
Competitiveness.
Embodiment
In order to deepen the understanding of the present invention, with reference to specific embodiment, the invention will be further described, the implementation
Example is only used for explaining the present invention, is not intended to limit the scope of the present invention..
Embodiment 1
A kind of reduction instant tea includes the method for the heavy metal ion content including arsenic, lead, and it comprises the following steps：
1. the Pu'er tea that mass concentration is 10% is prepared after Pu'er tea is extracted, centrifuged, is filtered, is concentrated to concentrate
Liquid；
2. by above-mentioned steps 1. obtained pu'er tea concentrated liquid at normal temperatures by being filled with LX-8 macroporous absorbent resins
Resin column, the volume ratio of the pu'er tea concentrated liquid and macroporous absorbent resin is 30：1, adjust the stream of permeate after resin adsorption
Speed is 2BV/h, collects post liquid A, crosses the edible alcohol after post terminates again by the use of 40% and is used as elution LX-8 macroporous absorption posts
The Tea Polyphenols of upper absorption, it is 3BV/h that regulation, which elutes flow velocity, when elution volume is 6BV, stops elution, collects eluent,
Eluent progress rotary evaporation in vacuo is handled to obtain Pu'er tea tea liquid B, and recovered alcohol；
3. by above-mentioned steps, 2. middle collection crosses post liquid A at normal temperatures by the resin column equipped with LSA-100 chelating resins,
The post liquid A and the volume ratio of LSA-100 chelating resins of crossing is 30：1, the flow velocity of permeate is 2BV/h after adjusting resin adsorption,
Collected post liquid C；
4. by above-mentioned steps 2. in Pu'er tea tea liquid B and step 3. in the post liquid C of crossing merge and mix, carry out reverse osmosis membrane
It is 20% to be concentrated into solution soluble solid content, is then freezed again, and Pu'er instant tea of low-heavy metal content is made
Powder.
The step 2. in LX-8 macroporous absorbent resins be loaded on by wet method after pretreatment in chromatographic column, first with 95%
Ethanol rinse, use redistilled water elution instead after eluate clarification, be washed till without obvious ethanol smell.
The step 3. in LSA-100 chelating resins be loaded on by wet method after pretreatment in chromatographic column, first with 95% second
Alcohol elutes, and uses redistilled water elution instead after eluate clarification, is washed till without obvious ethanol smell.
Arsenic content is 0.21ppm in the obtained Pu'er tea instant tea powder, lead content 0.63ppm, polyphenol content
18.11%, and the arsenic content for not carrying out the Pu'er tea instant tea powder of adsorption treatment with same Raw material processing is 0.40ppm, lead content
For 0.88ppm, polyphenol content 18.67%.
Embodiment 2
A kind of reduction instant tea includes the method for the heavy metal ion content including arsenic, lead, and it comprises the following steps：
1. using a kind of higher green tea of content of beary metal as raw material, by extracting, centrifuge, filter, being prepared after concentration technology
Obtain the green tea concentrated liquid that mass concentration is 15%；
2. by above-mentioned steps, 1. obtained green tea concentrated liquid passes through the resin equipped with LX-8 macroporous absorbent resins at normal temperatures
The volume ratio of post, the green tea concentrated liquid and LX-8 macroporous absorbent resins is 20：1, adjust the flow velocity of permeate after resin adsorption
For 1BV/h, collected post liquid A, then again by the use of 40% edible alcohol as adsorbing on elution LX-8 macroporous absorbent resins
Tea Polyphenols, to elute flow velocity be 2BV/h for regulation, stops eluting when to elution volume be 4.5BV, collection eluent, will wash
De- liquid carries out rotary evaporation in vacuo and obtains green tea tea liquid B, and recovered alcohol；
3. by above-mentioned steps, 2. middle collection crosses post liquid A at normal temperatures by the resin column equipped with LSA-100 chelating resins,
The post liquid A and the volume ratio of LSA-100 chelating resins of crossing is 10：1, the flow velocity of permeate is 3BV/h after adjusting resin adsorption,
Collected post liquid C；
4. by above-mentioned steps 2. in green tea tea liquid B and step 3. in the post liquid C of crossing merge and mix, be evaporated and be concentrated into
Solution soluble solid content is 10%, then carries out lyophilization again, and the green tea instant tea powder of low-heavy metal content is made.
The step 2. in LX-8 macroporous absorbent resins be loaded on by wet method after pretreatment in chromatographic column, first with 95%
Ethanol rinse, use redistilled water elution instead after eluate clarification, be washed till without obvious ethanol smell.
The step 3. in LSA-100 chelating resins be loaded on by wet method after pretreatment in chromatographic column, first with 95% second
Alcohol elutes, and uses redistilled water elution instead after eluate clarification, is washed till without obvious ethanol smell.
Arsenic content in the green tea instant tea powder being prepared is 0.44ppm, lead content 0.87ppm, Tea Polyphenols
Content 39.11%, and the arsenic content for not carrying out the green tea instant tea powder of adsorption treatment with same Raw material processing is 0.68ppm, lead contains
Measure as 1.22ppm, polyphenol content 41.96%.
Embodiment 3
A kind of reduction instant tea includes the method for the heavy metal ion content including arsenic, lead, and it comprises the following steps：
1. using tealeaves as raw material, by extracting, centrifuge, filter, being prepared after concentration technology the tea that mass concentration is 5%
Concentrate；
2. by above-mentioned steps 1. obtained tea concentrate at normal temperatures by the resin column equipped with LX-8 macroporous absorbent resins,
The volume ratio of the tea concentrate and LX-8 macroporous absorbent resins is 10：1, the flow velocity of permeate is 3BV/ after adjusting resin adsorption
H, post liquid A was collected, then the edible alcohol again by the use of 40% is more as the tea adsorbed on elution LX-8 macroporous absorbent resins
Phenol, to elute flow velocity be 1BV/h for regulation, stops eluting when to elution volume be 3BV, collection eluent, eluent is carried out
Rotary evaporation in vacuo obtains tea liquid B, and recovered alcohol；
3. by above-mentioned steps, 2. middle collection crosses post liquid A at normal temperatures by the resin column equipped with LSA-100 chelating resins,
The post liquid A and the volume ratio of LSA-100 chelating resins of crossing is 20：1, the flow velocity of permeate is 1BV/h after adjusting resin adsorption,
Collected post liquid C；
4. by above-mentioned steps 2. in tea liquid B and step 3. in the post liquid C of crossing merge and mix, carry out reverse osmosis membrane and be concentrated into
Solution soluble solid content is 30%, is then dried again, and the instant tea powder of low-heavy metal content is made.
The step 2. in LX-8 macroporous absorbent resins be loaded on by wet method after pretreatment in chromatographic column, first with 95%
Ethanol rinse, use redistilled water elution instead after eluate clarification, be washed till without obvious ethanol smell.
The step 3. in LSA-100 chelating resins be loaded on by wet method after pretreatment in chromatographic column, first with 95% second
Alcohol elutes, and uses redistilled water elution instead after eluate clarification, is washed till without obvious ethanol smell.
Arsenic content in the instant tea powder being prepared is 0.32ppm, lead content 0.74ppm, polyphenol content
25.51%, and the arsenic content for not carrying out the instant tea powder of adsorption treatment with same Raw material processing is 0.53ppm, lead content is
0.98ppm, polyphenol content 28.12%.
Embodiment 4
A kind of reduction instant tea includes the method for the heavy metal ion content including arsenic, lead, and it comprises the following steps：
1. using tealeaves as raw material, by extracting, centrifuge, filter, being prepared after concentration technology the tea that mass concentration is 12%
Concentrate；
2. by above-mentioned steps 1. obtained tea concentrate at normal temperatures by the resin column equipped with LX-8 macroporous absorbent resins,
The volume ratio of the tea concentrate and LX-8 macroporous absorbent resins is 15：1, the flow velocity of permeate is 1BV/ after adjusting resin adsorption
H, post liquid A was collected, then the edible alcohol again by the use of 40% is more as the tea adsorbed on elution LX-8 macroporous absorbent resins
Phenol, to elute flow velocity be 2BV/h for regulation, stops eluting when to elution volume be 5BV, collection eluent, eluent is carried out
Rotary evaporation in vacuo obtains tea liquid B, and recovered alcohol；
3. by above-mentioned steps, 2. middle collection crosses post liquid A at normal temperatures by the resin column equipped with LSA-100 chelating resins,
The post liquid A and the volume ratio of LSA-100 chelating resins of crossing is 25：1, the flow velocity of permeate is 3BV/h after adjusting resin adsorption,
Collected post liquid C；
4. by above-mentioned steps 2. in tea liquid B and step 3. in the post liquid C of crossing merge and mix, be evaporated and be concentrated into solution
Soluble solid content is 22%, is then dried again, and the instant tea powder of low-heavy metal content is made.
The step 2. in LX-8 macroporous absorbent resins be loaded on by wet method after pretreatment in chromatographic column, first with 95%
Ethanol rinse, use redistilled water elution instead after eluate clarification, be washed till without obvious ethanol smell.
The step 3. in LSA-100 chelating resins be loaded on by wet method after pretreatment in chromatographic column, first with 95% second
Alcohol elutes, and uses redistilled water elution instead after eluate clarification, is washed till without obvious ethanol smell.
Arsenic content in the instant tea powder being prepared is 0.51ppm, lead content 0.95ppm, polyphenol content
32.17%, and the arsenic content for not carrying out the instant tea powder of adsorption treatment with same Raw material processing is 0.76ppm, lead content is
1.13ppm, polyphenol content 35.46%.
Claims (5)
1. a kind of instant tea that reduces includes the method for the heavy metal ion content including arsenic, lead, it is characterised in that：Described side
Method comprises the following steps：
It is 1. dense by extracting, centrifuge, filter, being prepared after concentration technology the tea that mass concentration is 5-15% using tealeaves as raw material
Contracting liquid；
2. by above-mentioned steps, 1. obtained tea concentrate is described at normal temperatures by the resin column equipped with LX-8 macroporous absorbent resins
The volume ratio of tea concentrate and LX-8 macroporous absorbent resins is 10-30：1, the flow velocity of permeate is 1- after adjusting resin adsorption
3BV/h, collected post liquid A, then again by the use of 40% edible alcohol as adsorbing on elution LX-8 macroporous absorbent resins
Tea Polyphenols, to elute flow velocity be 1-3BV/h for regulation, stops eluting when to elution volume be 3-6BV, collection eluent, will wash
De- liquid is evaporated to obtain tea liquid B, and recovered alcohol；
3. by above-mentioned steps 2. middle collection cross post liquid A at normal temperatures by the resin column equipped with LSA-100 chelating resins, it is described
The volume ratio for crossing post liquid A and LSA-100 chelating resins is 10-30：1, the flow velocity of permeate is 1-3BV/ after adjusting resin adsorption
H, collected post liquid C；
4. by above-mentioned steps 2. in tea liquid B and step 3. in the post liquid C of crossing merge and mix, concentrated, being concentrated into solution can
Dissolubility solid content is 10-30%, is then dried again, and the instant tea powder of low-heavy metal content is made.
2. a kind of instant tea that reduces according to claim 1 includes the method for the heavy metal ion content including arsenic, lead,
It is characterized in that：The step 2. in LX-8 macroporous absorbent resins be loaded on by wet method after pretreatment in chromatographic column, first use
95% ethanol rinse, use redistilled water elution instead after eluate clarification, be washed till without obvious ethanol smell.
3. a kind of instant tea that reduces according to claim 1 includes the method for the heavy metal ion content including arsenic, lead,
It is characterized in that：The step 3. in LSA-100 chelating resins be loaded on by wet method after pretreatment in chromatographic column, first use
95% ethanol rinse, use redistilled water elution instead after eluate clarification, be washed till without obvious ethanol smell.
4. a kind of instant tea that reduces according to claim 1 includes the method for the heavy metal ion content including arsenic, lead,
It is characterized in that：The step 4. in concentration for be concentrated by evaporation or film concentration.
5. a kind of reduction instant tea according to claim 1 or 4 includes the side of the heavy metal ion content including arsenic, lead
Method, it is characterised in that：Described is evaporated to rotary evaporation in vacuo.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510126839.4A CN104642614B (en) | 2015-03-23 | 2015-03-23 | A kind of reduction instant tea includes the method for the heavy metal ion content including arsenic, lead |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510126839.4A CN104642614B (en) | 2015-03-23 | 2015-03-23 | A kind of reduction instant tea includes the method for the heavy metal ion content including arsenic, lead |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104642614A CN104642614A (en) | 2015-05-27 |
| CN104642614B true CN104642614B (en) | 2018-01-05 |
Family
ID=53234668
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510126839.4A Active CN104642614B (en) | 2015-03-23 | 2015-03-23 | A kind of reduction instant tea includes the method for the heavy metal ion content including arsenic, lead |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104642614B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106900923A (en) * | 2015-12-22 | 2017-06-30 | 云南天士力帝泊洱生物茶集团有限公司 | A kind of method of content of beary metal in reduction instant tea |
| CN112568303B (en) * | 2020-12-03 | 2023-08-29 | 杭州凯洁膜分离技术有限公司 | Instant tea preparation process based on microfiltration-reverse osmosis technology |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101849595A (en) * | 2010-02-03 | 2010-10-06 | 福建农林大学 | Method for reducing pesticide residue in instant tea by resin adsorption method |
| CN102511598A (en) * | 2011-12-16 | 2012-06-27 | 华南理工大学 | Method for removing alkaloid in tea by using macroporous resin |
| CN103694727A (en) * | 2013-12-11 | 2014-04-02 | 浙江茗皇天然食品开发有限公司 | Method for separating tea pigment from instant tea slagging waste liquid |
| CN103965272A (en) * | 2013-02-04 | 2014-08-06 | 沈阳天峰生物制药有限公司 | Method for removing heavy metal ions in stevioside |
-
2015
- 2015-03-23 CN CN201510126839.4A patent/CN104642614B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101849595A (en) * | 2010-02-03 | 2010-10-06 | 福建农林大学 | Method for reducing pesticide residue in instant tea by resin adsorption method |
| CN102511598A (en) * | 2011-12-16 | 2012-06-27 | 华南理工大学 | Method for removing alkaloid in tea by using macroporous resin |
| CN103965272A (en) * | 2013-02-04 | 2014-08-06 | 沈阳天峰生物制药有限公司 | Method for removing heavy metal ions in stevioside |
| CN103694727A (en) * | 2013-12-11 | 2014-04-02 | 浙江茗皇天然食品开发有限公司 | Method for separating tea pigment from instant tea slagging waste liquid |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104642614A (en) | 2015-05-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100413858C (en) | Method for producing high pure tea polyphenol with low caffeine | |
| CN103467540B (en) | A kind of method extracting rhodioside from Root of Kirilow Rhodiola | |
| CN100364985C (en) | Method of preparing tea polyphenol by resin adsorption method | |
| CN101986855A (en) | Method for preparing low-caffeine high-tea polyphenol tea powder | |
| CN106967137B (en) | Method for separating high-purity oleuropein by liquid chromatography through macroporous resin combined preparation | |
| CN104642614B (en) | A kind of reduction instant tea includes the method for the heavy metal ion content including arsenic, lead | |
| CN102488042A (en) | Method for catching tea aroma in instant tea powder production process | |
| CN1301252C (en) | Production method of high purity tea polyphenol and caffeine | |
| CN109821274B (en) | Method for removing heavy metals in water-soluble tea extract by using amino modified silica gel material | |
| CN105795095B (en) | Preparation method of cardamine violifolia selenoprotein with low heavy metal content | |
| CN101703130B (en) | Technology for producing green tea extract | |
| WO2021000224A1 (en) | Method for separation and purification of grape polyphenols by means of resin | |
| CN102600807A (en) | Adsorption material capable of adsorbing heavy metals by using modified silk, and preparation method of adsorption material | |
| CN107805712A (en) | A kind of method for removing organic matter in uranium-bearing alkaline leaching liquid | |
| JP6236608B2 (en) | Adsorption and removal of cesium from water | |
| CN104418741A (en) | Method for extracting purified chlorogenic acid from jerusalem artichoke leaves | |
| CN104610401A (en) | Method for simultaneously extracting baicalin, baicalein and wogonin from scutellaria baicalensis | |
| CN108752392A (en) | A method of recycling sweet tea tannins from the Sweet tea flocculated sludge after extraction Rubusoside | |
| CN101804129A (en) | Method for extracting natural tea polyphenol | |
| CN102924253A (en) | Method for extracting acetoin from fermentation liquor | |
| CN105878518A (en) | Separation and purification method of litchi polyphenol | |
| CN108191762B (en) | Extraction method of huperzia serrata extract without heavy metal | |
| CN102180937B (en) | Method for preparing enriched and refined akebin D with macroporous absorption resin | |
| CN109081777B (en) | Method for recovering and treating tetrafluorobenzoic acid wastewater | |
| CN101904530A (en) | Method for reducing content of heavy metal lead in nitrariatangutorum juice raw material by ion exchange method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |