CN103222520B - A kind of low-caffeine tea powder and preparation method thereof - Google Patents
A kind of low-caffeine tea powder and preparation method thereof Download PDFInfo
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Abstract
The invention provides a kind of low-caffeine tea powder and preparation method thereof, described low-caffeine tea powder is mixed with the ratio of 1: 1-20: 1 by Pu-Er ripe tea extract A and Pu'er raw tea extract B, wherein, Pu-Er ripe tea extract A is prepared as follows and obtains: taking Folium camelliae assamicae (processed), boiling, tea grounds discards, add ethanol after concentration to stand, precipitation separation, dry, to obtain final product；Pu'er raw tea extract B is prepared as follows and obtains: taking Pu'er raw tea, boiling, tea grounds discards, and concentrate drying to obtain final product.
Description
Technical field
The present invention relates to field of food, particularly to field of tea, be specially a kind of low-caffeine tea powder and preparation method thereof.
Background technology
Modern's diet is superfluous, it is irregular to live, a lot of sub-health state occurs, Folium camelliae assamicae is through ecologic planting and biotechnology perfect adaptation, make close to nano level pure natural, high power Folium camelliae assamicae elite, contain abundant tea polyphenols, Pu'er factor that tea pigment, tea polysaccharide, caffeine essence are joined, without any additive, more useful absorption of human body gives full play to healthy usefulness, nourishing effect be the nervous busy modern life of people releive body and mind, regulate metabolism.But brain is had excitation by the caffeine contained in tea, heart having certain zest, in people's brain, caffeine can stop ribosidoadenine accepter.Ribosidoadenine can slow down the activity of neurocyte with its accepter after being combined.Be typically in sleep time in combination with.Caffeine molecule is similar with ribosidoadenine, it is possible to be combined with same accepter.But it does not promote cellular activity to reduce, on the contrary, it stops ribosidoadenine to be combined with its accepter.Its result is that nerve cell activity increases, neurocyte secreting hormone epinephrine.Epinephrine causes palpitating speed, and blood pressure increases, and the blood flow in muscle improves, and the blood flow of skin and internal organs reduces, and liver discharges glucose to blood.In addition the caffeine neurotransmitter dopamine that can improve brain in the same as aminopropylbenzene.
Too many caffeine can cause caffeinism.Its symptom is that agitation, anxiety, excitement, insomnia, flushing, polyuria and digestive tract are uncomfortable.Spasm, thought and language can be caused to change suddenly more than 1 gram every day, heart beating is unstable, tachycardia and psychomotor agitation.
Caffeine does not result in calcium loss in adult human body, but have that bibliographical information caffeine can dissolve in child's skeleton calcareous, affect skeleton development.
In presently commercially available tea powder, the content of caffeine is about 7～9%, and therefore, some special populations such as old people, anemia of pregnant woman, child, heart patient and neurastheniac are drunk tea and be restricted.So the product developing a kind of low-caffeine tea powder can efficiently solve this problem, and there is necessity.But while reducing content of caffeine, the mouthfeel that people are formed for a long time can not be changed again, it is thus desirable to explore in technique with on selecting materials, the present invention is found surprisingly that, by Pu-Er ripe tea extract and Pu'er raw tea extract, mixing by a certain percentage while ensureing that mouthfeel is good, can reduce the content of caffeine, therefore a kind of new tea beverage is provided, simultaneously exploitation Low caffeine tea powder preparation technique.
The present invention provide not only the instant tea product of the wider crowd of a kind of suitability, it is also possible to for developing fat-reducing in the future, the tea health product of fat-reducing effect provide technological reserve.
Summary of the invention
It is an object of the present invention to provide a kind of low-caffeine tea powder.
The low-caffeine tea powder of the present invention, is mixed with the part by weight of 1: 1-20: 1 by Pu-Er ripe tea extract A and Pu'er raw tea extract B, it is preferable that 2: 1-9: 1, and more preferably 4: 1, wherein
Pu-Er ripe tea extract A is prepared as follows and obtains:
Taking Folium camelliae assamicae (processed) boiling, tea grounds discards, and adds ethanol and stand after concentration, and precipitation separation is dry, to obtain final product；
Pu'er raw tea extract B is prepared as follows and obtains:
Taking Pu'er raw tea boiling, tea grounds discards, and concentrate drying to obtain final product.
Figure of description is shown in the technological process of the present invention.
Preferably,
Pu-Er ripe tea extract A of the present invention is prepared as follows and obtains:
Take Folium camelliae assamicae (processed) appropriate, add 5-20 times amount water, preferred 6-12 times amount water, heat to 50-100 DEG C of extraction 1-3 time, each 0.5-3 hour, filter, tea grounds adds 4-16 times amount water, preferred 5-10 times amount water, heat 50-100 DEG C to extract 0.5-3 hour, filter, tea grounds discards, united extraction liquid, filter, 50-80 DEG C of reduced vacuum of filtrate is concentrated into relative density 1.02-1.15, centrifugal, obtain centrifuged supernatant, add 95% ethanol alcohol and be sink to alcohol content 50-80%, stand overnight, centrifugal, obtain precipitate with ethanol precipitation, add hot water to redissolve to proportion 1.02-1.15, centrifugal, obtain supernatant, dry, preferably spray drying or less than 70 DEG C reduced vacuum dry, obtain dry powder A, standby；
Obtain it is furthermore preferred that Pu-Er ripe tea extract A is prepared as follows:
Take Folium camelliae assamicae (processed) appropriate, add 10 times amount water and heat 80 DEG C of extractions 2 times, each 1 hour, filter, tea grounds adds 8 times amount water, heat 80 DEG C to extract 0.5 hour, filter, tea grounds discards, united extraction liquid, cross 300 order filter clothes, 70 DEG C of reduced vacuum of filtrate are concentrated into relative density 1.05-1.10, tubular type is centrifuged, obtain centrifuged supernatant, add 95% ethanol alcohol and be sink to alcohol content 80%, stand overnight, centrifugal, obtain precipitate with ethanol precipitation, add hot water to redissolve to proportion 1.05-1.10, tubular type is centrifuged, obtain supernatant, spray drying or less than 70 DEG C reduced vacuum dry, obtain dry powder A, standby.
Preferably,
Pu'er raw tea extract B of the present invention is prepared as follows and obtains:
Take Pu'er raw tea appropriate, add 5-20 times amount water, it is preferable that 6-12 times amount water, heat 50-100 DEG C and extract 1-3 time, each 0.5-3 hour, filtering, tea grounds adds 4-16 times amount water, it is preferable that 5-10 times amount water, heating 50-100 DEG C to extract 0.5-3 hour, filter, tea grounds discards, united extraction liquid, filters, and 50-80 DEG C of reduced vacuum of filtrate is concentrated into relative density 1.02-1.15, centrifugal, obtain centrifuged supernatant B, dry, preferably spray drying, obtains extract B, standby.
It is furthermore preferred that Pu'er raw tea extract B is prepared as follows and obtains:
Take Pu'er raw tea appropriate, add 10 times amount water and heat 80 DEG C of extractions 2 times, each 1 hour, filtering, tea grounds adds 8 times amount water, heats 80 DEG C and extracts 0.5 hour, filtering, tea grounds discards, united extraction liquid, crossing 300 order filter clothes, 70 DEG C of reduced vacuum of filtrate are concentrated into relative density 1.05-1.10, and tubular type is centrifuged, obtain centrifuged supernatant B, spray drying, obtains extract B, standby.
Another object of the present invention is to the preparation method providing a kind of low-caffeine tea powder, it comprises the steps:
Take Folium camelliae assamicae (processed) appropriate, add 5-20 times amount water, the heating of preferred 6-12 times amount water is extracted 1-3 time to 50-100 DEG C, each 0.5-3 hour, filter, tea grounds adds 4-16 times amount water, preferred 5-10 times amount water, heat 50-100 DEG C to extract 0.5-3 hour, filter, tea grounds discards, united extraction liquid, filter, 50-80 DEG C of reduced vacuum of filtrate is concentrated into relative density 1.02-1.15, centrifugal, obtain centrifuged supernatant, add 95% ethanol alcohol and be sink to alcohol content 50-80%, stand overnight, centrifugal, obtain precipitate with ethanol precipitation, add hot water to redissolve to proportion 1.02-1.15, centrifugal, obtain supernatant, dry, preferably spray drying or less than 70 DEG C reduced vacuum dry, obtain dry powder A, standby；
Take Pu'er raw tea appropriate, add 5-20 times amount, it is preferable that 6-12 times amount water, heat 50-100 DEG C and extract 1-3 time, each 0.5-3 hour, filtering, tea grounds adds 4-16 times amount water, it is preferable that 5-10 times amount water, heating 50-100 DEG C to extract 0.5-3 hour, filter, tea grounds discards, united extraction liquid, filters, and 50-80 DEG C of reduced vacuum of filtrate is concentrated into relative density 1.02-1.15, centrifugal, obtain centrifuged supernatant B, dry, preferably spray drying, obtains extract B, standby.
Mixing with the ratio of 1: 1-20: 1 in extract A and extract B, it is preferable that the ratio with 2: 1-9: 1 mixes, mix homogeneously obtains low-caffeine tea powder.
Most preferred preparation method is:
Take Folium camelliae assamicae (processed) appropriate, add 10 times amount water and heat 80 DEG C of extractions 2 times, each 1 hour, filter, tea grounds adds 8 times amount water, heat 80 DEG C to extract 0.5 hour, filter, tea grounds discards, united extraction liquid, cross 300 order filter clothes, 70 DEG C of reduced vacuum of filtrate are concentrated into relative density 1.05-1.10, tubular type is centrifuged, obtain centrifuged supernatant, add 95% ethanol alcohol and be sink to alcohol content 80%, stand overnight, centrifugal, obtain precipitate with ethanol precipitation, add hot water to redissolve to proportion 1.05-1.10, tubular type is centrifuged, obtain supernatant, spray drying or less than 70 DEG C reduced vacuum dry, obtain dry powder A, standby；
Take Pu'er raw tea appropriate, add 10 times amount water and heat 80 DEG C of extractions 2 times, each 1 hour, filtering, tea grounds adds 8 times amount water, heats 80 DEG C and extracts 0.5 hour, filtering, tea grounds discards, united extraction liquid, crossing 300 order filter clothes, 70 DEG C of reduced vacuum of filtrate are concentrated into relative density 1.05-1.10, and tubular type is centrifuged, obtain centrifuged supernatant B, spray drying, obtains extract B, standby；
Mix by extract A and extract B optimum proportioning 4: 1, mix homogeneously, obtain low-caffeine tea powder.
In order to further illustrate beneficial effects of the present invention, carry out following contrast experiment:
Choosing low-caffeine tea powder provided by the invention and each three batches of common tea powder, wherein content of caffeine is detected, result is table 1 such as.
Caffeine and polyphenol content in table 1 tea powder
As seen from the above table, in common Pu ' er tea powder, content of caffeine is about 7～9%, and in low-caffeine tea powder provided by the invention, content of caffeine can be 2～4%, it is seen then that this preparation method can substantially reduce the content of caffeine in common tea powder.
Additionally, this technique takes the method for water extract-alcohol precipitation to eliminate most caffeine in Folium camelliae assamicae (processed), but while content of caffeine reduces, in Folium camelliae assamicae, the content of another kind of onset composition tea polyphenols decreases, for ensureing low-caffeine tea powder and former tea powder concordance of other active constituent contents except caffeine, present invention employs the method mixing a small amount of Pu'er raw tea extract to be prepared, it is prepared in the product obtained, content of caffeine is relatively low, but the beneficial activity component contents such as tea polyphenols are all suitable with the content in common tea powder.
The low-caffeine tea powder of the present invention, when mouthfeel remains unchanged, removing the part caffeine in tea powder, thus playing a role in health care, providing a kind of wholesome new tea product for market.
Accompanying drawing illustrates:
Fig. 1 Folium camelliae assamicae (processed) extraction process
Fig. 2 Folium camelliae assamicae (processed) extraction process
Fig. 3 Pu'er raw tea extraction process
Detailed description of the invention:
Further illustrate the present invention by the following examples, but not as limitation of the present invention.
Embodiment 1
Take Folium camelliae assamicae (processed) 1000g, add 10 times amount water and heat 80 DEG C of extractions 2 times, each 1 hour, filter, tea grounds adds 8 times amount water, heat 80 DEG C to extract 0.5 hour, filter, tea grounds discards, united extraction liquid, cross 300 order filter clothes, 70 DEG C of reduced vacuum of filtrate are concentrated into relative density 1.05-1.10, tubular type is centrifuged, obtain centrifuged supernatant, add 95% ethanol alcohol and be sink to alcohol content 80%, stand overnight, centrifugal, obtain precipitate with ethanol precipitation, add hot water to redissolve to proportion 1.05-1.10, tubular type is centrifuged, obtain supernatant, spray drying or less than 70 DEG C reduced vacuum dry, obtain dry powder 120g (extract A), standby；
Take Pu'er raw tea 1000g, add 10 times amount water and heat 80 DEG C of extractions 2 times, each 1 hour, filtering, tea grounds adds 8 times amount water, heats 80 DEG C and extracts 0.5 hour, filtering, tea grounds discards, united extraction liquid, crossing 300 order filter clothes, 70 DEG C of reduced vacuum of filtrate are concentrated into relative density 1.05-1.10, and tubular type is centrifuged, obtain centrifuged supernatant, spray drying or less than 70 DEG C reduced vacuum dry, and obtain extract 360g (extract B), standby；Mix by extract A and extract B optimum proportioning 4: 1, mix homogeneously, obtain low-caffeine tea powder.
Embodiment 2
Take Folium camelliae assamicae (processed) 1000g, add 6 times amount water heating and refluxing extraction 2 times, each 1 hour, filter, tea grounds adds 5 times amount water, heating and refluxing extraction 0.5 hour, filter, tea grounds discards, united extraction liquid, filter, 70 DEG C of reduced vacuum of filtrate are concentrated into relative density 1.02-1.15, centrifugal, obtain centrifuged supernatant, add 95% ethanol alcohol and be sink to alcohol content 85%, stand overnight, centrifugal, obtain precipitate with ethanol precipitation, add hot water to redissolve to proportion 1.02-1.15, it is centrifuged or filters, obtain supernatant, spray drying or less than 70 DEG C reduced vacuum dry, obtain dry powder 100g (extract A), standby；
Take Pu'er raw tea 1000g, add 6 times amount water heating and refluxing extraction 2 times, each 1 hour, filtering, tea grounds adds 5 times amount water, heating and refluxing extraction 0.5 hour, filtering, tea grounds discards, united extraction liquid, filtering, 70 DEG C of reduced vacuum of filtrate are concentrated into relative density 1.02-1.15, centrifugal, obtain centrifuged supernatant, spray drying or less than 70 DEG C reduced vacuum dry, and obtain dry powder 300g (extract B), standby.Mix with 2: 1 ratios in extract A and extract B, mix homogeneously, obtain low-caffeine tea powder.
Embodiment 3
Take Folium camelliae assamicae (processed) 1000g, add 12 times amount water heating to reflux, extract, 2 times, each 0.5 hour, filter, tea grounds adds 10 times amount water, heating and refluxing extraction 0.5 hour, filter, tea grounds discards, united extraction liquid, filter, 50-80 DEG C of reduced vacuum of filtrate is concentrated into relative density 1.02-1.15, centrifugal, obtain centrifuged supernatant, add 95% ethanol alcohol and be sink to alcohol content 70%, stand overnight, centrifugal, obtain precipitate with ethanol precipitation, add hot water to redissolve to proportion 1.02-1.15, centrifugal, obtain supernatant, spray drying or less than 70 DEG C reduced vacuum dry, obtain dry powder 110g (extract A), standby；
Take Pu'er raw tea 1000g, add 12 times amount water heating extraction 2 times, each 1 hour, filtering, tea grounds adds 10 times amount water, heating extraction 1 hour, filtering, tea grounds discards, united extraction liquid, filtering, 50-80 DEG C of reduced vacuum of filtrate is concentrated into relative density 1.02-1.15, centrifugal, obtain centrifuged supernatant, spray drying or less than 70 DEG C reduced vacuum dry, and obtain extract 370g (extract B), standby.
Mix with 9: 1 ratios in extract A and extract B, mix homogeneously, obtain low-caffeine tea powder.
Embodiment 4
Take Folium camelliae assamicae (processed) 10kg, add 8 times amount water heating extraction 2 times, each 1 hour, filtering, tea grounds adds 8 times amount water, heating extraction 0.5 hour, filtering, tea grounds discards, united extraction liquid, filter, 60 DEG C of reduced vacuum of filtrate are concentrated into relative density 1.02-1.15, centrifugal, obtain centrifuged supernatant, add 95% ethanol alcohol and be sink to alcohol content 80%, stand overnight, centrifugal, obtain precipitate with ethanol precipitation, add hot water to redissolve to proportion 1.02-1.15, centrifugal, obtain supernatant, spray drying, obtain dry powder 1.1kg (extract A), standby；
Take Pu'er raw tea 5kg, add 8 times amount water heating extraction 2 times, each 1 hour, filtering, tea grounds adds 8 times amount water, heating extraction 0.5 hour, filtering, tea grounds discards, united extraction liquid, filtering, 60 DEG C of reduced vacuum of filtrate are concentrated into relative density 1.02-1.15, centrifugal, obtain centrifuged supernatant B, spray drying, obtains extract 1.7kg (extract B), standby.
Mix with 3: 1 ratios in extract A and extract B, mix homogeneously, obtain low-caffeine tea powder.
Embodiment 5
Take Folium camelliae assamicae (processed) 10kg, add 8 times amount water heating extraction 2 times, each 1 hour, filtering, tea grounds adds 8 times amount water, heating extraction 0.5 hour, filtering, tea grounds discards, united extraction liquid, filter, 60 DEG C of reduced vacuum of filtrate are concentrated into relative density 1.02-1.15, centrifugal, obtain centrifuged supernatant, add 95% ethanol alcohol and be sink to alcohol content 80%, stand overnight, centrifugal, obtain precipitate with ethanol precipitation, add hot water to redissolve to proportion 1.02-1.15, centrifugal, obtain supernatant, spray drying, obtain dry powder 1.1kg (extract A), standby；
Take Pu'er raw tea 5kg, add 8 times amount water heating extraction 2 times, each 1 hour, filtering, tea grounds adds 8 times amount water, heating extraction 0.5 hour, filtering, tea grounds discards, united extraction liquid, filtering, 60 DEG C of reduced vacuum of filtrate are concentrated into relative density 1.02-1.15, centrifugal, obtain centrifuged supernatant B, spray drying, obtains extract 1.7kg (extract B), standby.
Mix with 5: 1 ratios in extract A and extract B, mix homogeneously, obtain low-caffeine tea powder.
Embodiment 6
Take Folium camelliae assamicae (processed) 1kg, add 20 times amount water heating extraction 2 times, each 0.5 hour, filter, tea grounds adds 16 times amount water, heating extraction 0.5 hour, filter, tea grounds discards, united extraction liquid, filter, 70 DEG C of reduced vacuum of filtrate are concentrated into relative density 1.02-1.15, centrifugal, obtain centrifuged supernatant, add 95% ethanol alcohol and be sink to alcohol content 80%, stand overnight, centrifugal, obtain precipitate with ethanol precipitation, add hot water to redissolve to proportion 1.02-1.15, centrifugal, obtain supernatant, less than 70 DEG C reduced vacuum are concentrated into proportion 1.3, less than 70 DEG C reduced vacuum dry, obtain dry powder 130g (extract A), standby；
Pu'er raw tea extract B is prepared as follows and obtains:
Take Pu'er raw tea 1kg, add 20 times amount aqueous solvent heating extraction 2 times, each 0.5 hour, filtering, tea grounds adds 16 times amount aqueous solvents, heating extraction 0.5 hour, filtering, tea grounds discards, united extraction liquid, filtering, 70 DEG C of reduced vacuum of filtrate are concentrated into relative density 1.02-1.15, centrifugal, obtain centrifuged supernatant, dry, obtain extract 370g (extract B), standby.
Mix with the ratio of 20: 1 in extract A and extract B, mix homogeneously, obtain low-caffeine tea powder.
Embodiment 7
Take Folium camelliae assamicae (processed) 1kg, add 20 times amount water heating extraction 2 times, each 0.5 hour, filter, tea grounds adds 16 times amount water, heating extraction 0.5 hour, filter, tea grounds discards, united extraction liquid, filter, 70 DEG C of reduced vacuum of filtrate are concentrated into relative density 1.02-1.15, centrifugal, obtain centrifuged supernatant, add 95% ethanol alcohol and be sink to alcohol content 80%, stand overnight, centrifugal, obtain precipitate with ethanol precipitation, add hot water to redissolve to proportion 1.02-1.15, centrifugal, obtain supernatant, less than 70 DEG C reduced vacuum are concentrated into proportion 1.3, less than 70 DEG C reduced vacuum dry, obtain dry powder 130g (extract A), standby；
Pu'er raw tea extract B is prepared as follows and obtains:
Take Pu'er raw tea 1kg, add 20 times amount aqueous solvent heating extraction 2 times, each 0.5 hour, filtering, tea grounds adds 16 times amount aqueous solvents, heating extraction 0.5 hour, filtering, tea grounds discards, united extraction liquid, filtering, 70 DEG C of reduced vacuum of filtrate are concentrated into relative density 1.02-1.15, centrifugal, obtain centrifuged supernatant, dry, obtain extract 370g (extract B), standby.
Mix with the ratio of 15: 1 in extract A and extract B, mix homogeneously, obtain low-caffeine tea powder.
Embodiment 8
Take Folium camelliae assamicae (processed) 1000g, add 16 times amount water heating extraction 2 times, each 2 hours, filtering, tea grounds adds 16 times amount water, heating extraction 2 hours, filtering, tea grounds discards, united extraction liquid, filter, 50 DEG C of reduced vacuum of filtrate are concentrated into relative density 1.02-1.15, centrifugal, obtain centrifuged supernatant, add 95% ethanol alcohol and be sink to alcohol content 80%, stand overnight, centrifugal, obtain precipitate with ethanol precipitation, add hot water to redissolve to proportion 1.02-1.15, centrifugal, obtain supernatant, spray drying, obtain dry powder 120g (extract A), standby；
Pu'er raw tea extract B is prepared as follows and obtains:
Take Pu'er raw tea 1000g, add 16 times amount aqueous solvents and heat 100 DEG C of extractions 1 time, each 1 hour, filtering, tea grounds adds 16 times amount aqueous solvents, heats 100 DEG C and extracts 1 hour, filtering, tea grounds discards, united extraction liquid, filtering, 50 DEG C of reduced vacuum of filtrate are concentrated into relative density 1.02-1.15, centrifugal, obtain centrifuged supernatant, spray drying, obtains extract 350g (extract B), standby.
Mix with the ratio of 1: 1 in extract A and extract B, mix homogeneously, obtain low-caffeine tea powder.
Claims (7)
1. a low-caffeine tea powder, it is characterised in that mixed with the ratio of 2:1-9:1 by Pu-Er ripe tea extract A and Pu'er raw tea extract B, wherein, Pu-Er ripe tea extract A is prepared as follows and obtains:
Take Folium camelliae assamicae (processed) appropriate, add the heating of 5-20 times amount water and extract 1-3 time to 50-100 DEG C, each 0.5-3 hour, filter, tea grounds adds 4-16 times amount water, heats 50-100 DEG C and extracts 0.5-3 hour, filters, tea grounds discards, united extraction liquid, filters, and 50-80 DEG C of reduced vacuum of filtrate is concentrated into relative density 1.02-1.15, centrifugal, obtain centrifuged supernatant, add 95% ethanol alcohol and be sink to alcohol content 50-80%, stand overnight, centrifugal, obtain precipitate with ethanol precipitation, add hot water and redissolve to proportion 1.02-1.15, centrifugal, obtain supernatant, dry and to obtain dry powder A；
Pu'er raw tea extract B is prepared as follows and obtains:
Take Pu'er raw tea appropriate, add 5-20 times amount water and heat 50-100 DEG C of extraction 1-3 time, each 0.5-3 hour, filtering, tea grounds adds 4-16 times amount water, heats 50-100 DEG C and extracts 0.5-3 hour, filtering, tea grounds discards, united extraction liquid, filter, 50-80 DEG C of reduced vacuum of filtrate is concentrated into relative density 1.02-1.15, centrifugal, obtains centrifuged supernatant B, dry, obtain extract B.
2. a low-caffeine tea powder, it is characterised in that mixed with the ratio of 2:1-9:1 by Pu-Er ripe tea extract A and Pu'er raw tea extract B, wherein, Pu-Er ripe tea extract A is prepared as follows and obtains:
Take Folium camelliae assamicae (processed) appropriate, add the heating of 6-12 times amount water to extract 1-3 time to 50-100 DEG C, each 0.5-3 hour, filter, tea grounds adds 5-10 times amount water, heat 50-100 DEG C to extract 0.5-3 hour, filter, tea grounds discards, united extraction liquid, filter, 50-80 DEG C of reduced vacuum of filtrate is concentrated into relative density 1.02-1.15, centrifugal, obtain centrifuged supernatant, add 95% ethanol alcohol and be sink to alcohol content 50-80%, stand overnight, centrifugal, obtain precipitate with ethanol precipitation, add hot water to redissolve to proportion 1.02-1.15, centrifugal, obtain supernatant, spray drying or less than 70 DEG C reduced vacuum dry, obtain dry powder A；
Pu'er raw tea extract B is prepared as follows and obtains:
Take Pu'er raw tea appropriate, add 6-12 times amount water and heat 50-100 DEG C of extraction 1-3 time, each 0.5-3 hour, filtering, tea grounds adds 5-10 times amount water, heats 50-100 DEG C and extracts 0.5-3 hour, filtering, tea grounds discards, united extraction liquid, filter, 50-80 DEG C of reduced vacuum of filtrate is concentrated into relative density 1.02-1.15, centrifugal, obtains centrifuged supernatant B, spray drying or less than 70 DEG C reduced vacuum dry, and obtain extract B.
3. a low-caffeine tea powder, it is characterised in that mixed with the ratio of 2:1-9:1 by Pu-Er ripe tea extract A and Pu'er raw tea extract B, wherein, Pu-Er ripe tea extract A is prepared as follows and obtains:
Take Folium camelliae assamicae (processed) appropriate, add 10 times amount water and heat 80 DEG C of extractions 2 times, each 1 hour, filtering, tea grounds adds 8 times amount water, heats 80 DEG C and extracts 0.5 hour, filter, tea grounds discards, united extraction liquid, crosses 300 order filter clothes, 70 DEG C of reduced vacuum of filtrate are concentrated into relative density 1.05-1.10, tubular type is centrifuged, and obtains centrifuged supernatant, adds 95% ethanol alcohol and be sink to alcohol content 80%, stand overnight, centrifugal, obtain precipitate with ethanol precipitation, add hot water and redissolve to proportion 1.05-1.10, tubular type is centrifuged, obtaining supernatant, spray drying or less than 70 DEG C reduced vacuum dry, and obtain dry powder A；
Described Pu'er raw tea extract B is prepared as follows and obtains:
Take Pu'er raw tea appropriate, add 10 times amount water and heat 80 DEG C of extractions 2 times, each 1 hour, filtering, tea grounds adds 8 times amount water, heats 80 DEG C and extracts 0.5 hour, filtering, tea grounds discards, united extraction liquid, cross 300 order filter clothes, 70 DEG C of reduced vacuum of filtrate are concentrated into relative density 1.05-1.10, and tubular type is centrifuged, and obtains centrifuged supernatant B, spray drying, obtains extract B.
4. the low-caffeine tea powder according to any one of claim 1-3, it is characterised in that Pu-Er ripe tea extract A and Pu'er raw tea extract B mix with the ratio of 4:1.
5. the preparation method of a low-caffeine tea powder, it is characterised in that comprise the steps:
Take Folium camelliae assamicae (processed) appropriate, add the heating of 5-20 times amount water and extract 1-3 time to 50-100 DEG C, each 0.5-3 hour, filtering, tea grounds adds 4-16 times amount water, heats 50-100 DEG C and extracts 0.5-3 hour, filter, tea grounds discards, united extraction liquid, filters, 50-80 DEG C of reduced vacuum of filtrate is concentrated into relative density 1.02-1.15, centrifugal, obtain centrifuged supernatant, add 95% ethanol alcohol and be sink to alcohol content 50-80%, stand overnight, centrifugal, obtain precipitate with ethanol precipitation, add hot water and redissolve to proportion 1.02-1.15, centrifugal, obtain supernatant, dry, obtain dry powder A；
Take Pu'er raw tea appropriate, add 5-20 times amount aqueous solvent and heat 50-100 DEG C of extraction 1-3 time, each 0.5-3 hour, filtering, tea grounds adds 4-16 times amount aqueous solvent, heats 50-100 DEG C and extracts 0.5-3 hour, filtering, tea grounds discards, united extraction liquid, filter, 50-80 DEG C of reduced vacuum of filtrate is concentrated into relative density 1.02-1.15, centrifugal, obtains centrifuged supernatant B, dry, obtain extract B；
Extract A and extract B mix with the ratio of 2:1-9:1, and mix homogeneously to obtain final product.
6. the preparation method of a low-caffeine tea powder, it is characterised in that comprise the steps:
Take Folium camelliae assamicae (processed) appropriate, add the heating of 6-12 times amount water to extract 1-3 time to 50-100 DEG C, each 0.5-3 hour, filter, tea grounds adds 5-10 times amount water, heat 50-100 DEG C to extract 0.5-3 hour, filter, tea grounds discards, united extraction liquid, filter, 50-80 DEG C of reduced vacuum of filtrate is concentrated into relative density 1.02-1.15, centrifugal, obtain centrifuged supernatant, add 95% ethanol alcohol and be sink to alcohol content 50-80%, stand overnight, centrifugal, obtain precipitate with ethanol precipitation, add hot water to redissolve to proportion 1.02-1.15, centrifugal, obtain supernatant, spray drying or less than 70 DEG C reduced vacuum dry, obtain dry powder A；
Take Pu'er raw tea appropriate, add 6-12 times amount water and heat 50-100 DEG C of extraction 1-3 time, each 0.5-3 hour, filtering, tea grounds adds 5-10 times amount water, heats 50-100 DEG C and extracts 0.5-3 hour, filtering, tea grounds discards, united extraction liquid, filter, 50-80 DEG C of reduced vacuum of filtrate is concentrated into relative density 1.02-1.15, centrifugal, obtains centrifuged supernatant B, spray drying or less than 70 DEG C reduced vacuum dry, and obtain extract B；
Extract A and extract B mix with the ratio of 2:1-9:1, and mix homogeneously to obtain final product.
7. the preparation method of a low-caffeine tea powder, it is characterised in that comprise the steps:
Take Folium camelliae assamicae (processed) appropriate, add 10 times amount water and heat 80 DEG C of extractions 2 times, each 1 hour, filtering, tea grounds adds 8 times amount water, heats 80 DEG C and extracts 0.5 hour, filter, tea grounds discards, united extraction liquid, crosses 300 order filter clothes, 70 DEG C of reduced vacuum of filtrate are concentrated into relative density 1.05-1.10, tubular type is centrifuged, and obtains centrifuged supernatant, adds 95% ethanol alcohol and be sink to alcohol content 80%, stand overnight, centrifugal, obtain precipitate with ethanol precipitation, add hot water and redissolve to proportion 1.05-1.10, tubular type is centrifuged, obtaining supernatant, spray drying or less than 70 DEG C reduced vacuum dry, and obtain dry powder A；
Take Pu'er raw tea appropriate, add 10 times amount water and heat 80 DEG C of extractions 2 times, each 1 hour, filtering, tea grounds adds 8 times amount water, heats 80 DEG C and extracts 0.5 hour, filtering, tea grounds discards, united extraction liquid, cross 300 order filter clothes, 70 DEG C of reduced vacuum of filtrate are concentrated into relative density 1.05-1.10, and tubular type is centrifuged, and obtains centrifuged supernatant B, spray drying, obtains extract B；
Extract A and extract B mix with the ratio of 4:1, and mix homogeneously to obtain final product.
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| CN1742594A (en) * | 2005-06-24 | 2006-03-08 | 云南农业大学 | Pu'er tea and use thereof |
| CN101720834A (en) * | 2009-12-30 | 2010-06-09 | 云南龙润茶业集团有限公司 | Pu'er tea health-care food and preparation method thereof |
| CN101961061A (en) * | 2009-07-24 | 2011-02-02 | 天津天士力现代中药资源有限公司 | Pu-erh tea extract, preparation method and application |
| CN101961422A (en) * | 2009-07-24 | 2011-02-02 | 天津天士力现代中药资源有限公司 | Extractive of Pu'er tea and preparation method thereof |
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| CN1742594A (en) * | 2005-06-24 | 2006-03-08 | 云南农业大学 | Pu'er tea and use thereof |
| CN101961061A (en) * | 2009-07-24 | 2011-02-02 | 天津天士力现代中药资源有限公司 | Pu-erh tea extract, preparation method and application |
| CN101961422A (en) * | 2009-07-24 | 2011-02-02 | 天津天士力现代中药资源有限公司 | Extractive of Pu'er tea and preparation method thereof |
| CN101720834A (en) * | 2009-12-30 | 2010-06-09 | 云南龙润茶业集团有限公司 | Pu'er tea health-care food and preparation method thereof |
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