CN103416546A - Method for preparing cold-soluble green tea powder and product - Google Patents
Method for preparing cold-soluble green tea powder and product Download PDFInfo
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- CN103416546A CN103416546A CN201310381194XA CN201310381194A CN103416546A CN 103416546 A CN103416546 A CN 103416546A CN 201310381194X A CN201310381194X A CN 201310381194XA CN 201310381194 A CN201310381194 A CN 201310381194A CN 103416546 A CN103416546 A CN 103416546A
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Abstract
The invention discloses a method for preparing cold-soluble green tea powder. The method includes the following steps that after green tea is pulverized, the pulverized green tea is filtered through a 40-80 mesh screen, deionized water is added according to the feed liquid mass ratio of 1:10-1:30, extraction is performed on the mixture for 10-30 minutes at the pressure value of 100-400MPa after the mixture is sealed, then, extract liquid is filtered with a piece of 150-300 mesh filter cloth, filtrate is collected and centrifuged for 10-40 minutes at the rotating speed of 3000r/min-5500r/min, supernatant is collected and concentrated to the state that the soluble solid accounts for 16-22%, and concentrated liquor is acquired; finally, the concentrated liquor is frozen and dried in a vacuum freezing mode at -40 - -70 DEG C for 24-48 hours, and the cold-soluble tea powder is acquired. The cold-soluble tea powder prepared with the method is good in cold-dissolving effect and capable of dissolving fast at 3-8 DEG C, the tea powder and tea soup are greener than that acquired through hot water extraction, taste mellow and sweet slightly and thus are well liked by consumers.
Description
Technical field
The invention belongs to field of food, be specifically related to prepare the method for cold cut green tea powder, also relate to product obtained by this method.
Background technology
Green tea is by the tea tree young leaves, through techniques such as completing, knead, be dry, makes.Its product of making has retained the Tea Polyphenols in green tea, amino acid isoreactivity material.Green tea is mainly by drinking after hot-water soak, but immersion is more time-consuming, and after soaking, water temperature is higher, should not drink at once.Instant green tea is a kind of Novel beverage, has saved the loaded down with trivial details step of making tea, and therefore firmly gets the consumer and likes.But traditional instant green tea cold cut is poor, generally need to use hot-water soak, thus can't meet the demand that hot summer is relieved summer heat in time and quenched one's thirst to the consumer, and traditional instant green tea soup colour cast Huang.Its reason is mainly that the lixiviate of traditional instant green tea adopts the boiling water extraction more, then, through filtration, centrifugal, concentrated, dry run, makes the pressed powder that is soluble in hot water.Because instant green tea extraction temperature and extraction time prepared by traditional leach extraction method are long, make in tealeaves the materials such as some protein that are difficult at low temperatures stripping, pectin also be leached, and drying process adopts spray drying process usually, thereby caused that traditional instant green tea cold cut is poor, mouthfeel and the not good problem of color and luster exist.
The present invention is directed to the deficiency of traditional instant green tea processing technology, the green tea powder that a kind of cold cut is good is provided, avoid traditional hot water lixiviate, the cold cut that spray-drying causes is poor, mouthfeel and the not good problem of color and luster.
Summary of the invention
In view of this, one of purpose of the present invention is to provide a kind of method for preparing cold cut green tea powder, and the preparation method is simple, adopts the high pressure lixiviate, reverse osmosis concentration and vacuum freeze-drying method preparation; Two of purpose of the present invention is to provide the product made by said method, and this product cold cut is good, and mouthfeel and color and luster are good.
For achieving the above object, provide following technical scheme:
1. prepare the method for cold cut green tea powder, comprise the steps:
A. after green tea being pulverized, crossing 40～80 eye mesh screens, is that 1:10～1:30 adds deionized water by the feed liquid mass ratio, and sealing, be then lixiviate 10～30min under 100～400MPa condition in force value, obtains leaching liquor;
B. steps A gained leaching liquor is crossed to 150～300 order filter clothes, collecting filtrate is centrifugal 10～40min under 3000r/min～5500r/min condition at rotating speed, collects supernatant, obtains millet paste;
C. step B gained millet paste is concentrated into to soluble solid and reaches 16～22%, obtain concentrate;
D. be vacuum freeze drying 24-48 hour under-40～-70 ℃ of conditions in temperature after step C gained concentrate being frozen, obtain cold cut tea powder.
Preferably, in steps A, the feed liquid mass ratio is 1:15～1:30.
Preferred, in steps A, the feed liquid mass ratio is 1:15.
Preferably, in steps A, in force value, be lixiviate under 100～300MPa condition, under 200～300MPa condition, effect is better.
Preferably, described simmer down to reverse osmosis concentration.
Preferred, step D is after step C gained concentrate is frozen in temperature, to be vacuum freeze drying 36-48 hour under-40～-50 ℃ of conditions.
Most preferred, step D is that by step C gained concentrate, freezing in temperature is vacuum freeze drying under-50 ℃ of conditions 36 hours.
2. the cold cut green tea powder that utilizes above-mentioned method to make.
Beneficial effect of the present invention is: the invention discloses the method for preparing cold cut green tea powder, by high pressure (100-400Mpa) Assisted Extraction, can reduce in green tea that the insoluble matter such as protein, pectin is immersed to be put forward, improve the cold cut of cold cut green tea powder, concentrated at low temperatures after lixiviate, finally adopt vacuum freeze drying, prevent the tea powder variable color made, increase and protect green property; Therefore, the cold cut of the cold cut green tea powder that utilizes method of the present invention to make is good, under 3～8 ℃ of conditions, can dissolve fast, and the tea powder of dissolution velocity specific heat flooding is fast; Color and luster is good, and millet paste L value and a value absolute value be apparently higher than the millet paste of hot water lixiviate, and the product that shows to utilize method of the present invention to prepare is large with the millet paste brightness ratio modern crafts product of cold water bubble, and color and luster is greener; Mouthfeel is good, flavour alcohol and, slightly return sweetly, liked by the consumer.
The specific embodiment
Below in conjunction with specific embodiment, the preferred embodiments of the present invention are described in detail.The experimental technique of unreceipted actual conditions in embodiment, usually according to normal condition or the condition of advising according to manufacturer.
Embodiment 1
Prepare the method for cold cut green tea powder, comprise the steps:
A. select excellent green tea 1kg, after the grater polishing, excessively after 40 mesh sieves, add the 30kg deionized water, sealing, be then lixiviate 30min under the 100Mpa condition at pressure, obtains leaching liquor;
B. steps A gained leaching liquor being crossed to 150 order filter clothes, collect filtrate, is under the 3500r/min condition centrifugal 30 minutes by filtrate in rotating speed, collects supernatant, obtains millet paste;
C. step B gained millet paste is adopted to reverse osmosis concentration, be concentrated into soluble solid and reach 16%, obtain concentrate;
D. step C gained concentrate is put into to refrigerator and cooled and freezes ice, after freezing under-40 ℃ of conditions vacuum freeze drying 48 hours, obtain cold cut green tea powder.
The cold cut green tea powder that utilizes the present embodiment to make is 197g, gets 0.45g in cup, injects the water that the 140mL temperature is 3～8 ℃, and after the tea powder dissolves fully, the soup look is peak green, and clarification is bright, delicate fragrance, flavour alcohol and, slightly return sweet.
Embodiment 2
Prepare the method for cold cut green tea powder, comprise the steps:
A. select excellent green tea 1kg, after the grater polishing, excessively after 80 mesh sieves, add the 20kg deionized water, sealing, be then lixiviate 20min under the 200Mpa condition at pressure, obtains leaching liquor;
B. steps A gained leaching liquor being crossed to 200 order filter clothes, collect filtrate, is under the 4000r/min condition centrifugal 30 minutes by filtrate in rotating speed, collects supernatant, obtains millet paste;
C. step B gained millet paste is adopted to reverse osmosis concentration, be concentrated into soluble solid and reach 20%, obtain concentrate;
D. step C gained concentrate is put into to refrigerator and cooled and freezes ice, after freezing under-50 ℃ of conditions vacuum freeze drying 36 hours, obtain cold cut green tea powder.
The cold cut green tea powder that utilizes the present embodiment to make is 205g, gets 0.45g in cup, injects the water that the 140mL temperature is 3～8 ℃, and after the tea powder dissolves fully, the soup look is peak green, clarify bright, delicate fragrance, flavour alcohol and, return sweet.
Embodiment 3
Prepare the method for cold cut green tea powder, comprise the steps:
A. select excellent green tea 1kg, after the grater polishing, excessively after 60 mesh sieves, add the 15kg deionized water, sealing, be lixiviate 10min under the 300Mpa condition at pressure, obtains leaching liquor;
B. steps A gained leaching liquor being crossed to 300 order filter clothes, collect filtrate, is under the 5500r/min condition centrifugal 30 minutes by filtrate in rotating speed, collects supernatant, obtains millet paste;
C. step B gained millet paste is adopted to reverse osmosis concentration, be concentrated into soluble solid and reach 22%, obtain concentrate;
D. step C gained concentrate is put into to refrigerator and cooled and freezes ice, after freezing under-50 ℃ of conditions vacuum freeze drying 36 hours, obtain cold cut green tea powder.
The cold cut green tea powder that utilizes the present embodiment to make is 205g, gets 0.45g in cup, injects the water that the 140mL temperature is 3～8 ℃, and after the tea powder dissolves fully, the soup look is peak green, clarify bright, delicate fragrance, fresh taste, return sweet.
Embodiment 4
Prepare the method for cold cut green tea powder, comprise the steps:
A. select excellent green tea 1kg, after the grater polishing, excessively after 80 mesh sieves, add the 10kg deionized water, sealing, be lixiviate 20min under the 400Mpa condition at pressure, obtains leaching liquor;
B. steps A gained leaching liquor being crossed to 200 order filter clothes, collect filtrate, is under the 4000r/min condition centrifugal 30 minutes by filtrate in rotating speed, collects supernatant, obtains millet paste;
C. step B gained millet paste is adopted to reverse osmosis concentration, be concentrated into soluble solid and reach 20%, obtain concentrate;
D. step C gained concentrate is put into to refrigerator and cooled and freezes ice, after freezing under-70 ℃ of conditions vacuum freeze drying 24 hours, obtain cold cut green tea powder.
The cold cut green tea powder that utilizes the present embodiment to make is 205g, gets 0.45g in cup, injects the water that the 140mL temperature is 3～8 ℃, the tea powder can dissolve fully, but speed is slightly slower than example 3, slightly faster than example Isosorbide-5-Nitrae, the soup look is peak green, color and luster is than example 1, example 3 greener but green not as example 2, and brightness ratio example 1 is good, but slightly poorer than example 2,3.Clarification, delicate fragrance, flavour alcohol and, slightly return sweet.
The comparative example 1
Prepare the method for cold cut green tea powder, comprise the steps:
A. select excellent green tea 1kg, after the grater polishing, cross the deionized water that adds 15kg to seethe with excitement after 40 mesh sieves, then lixiviate 30min in 90 ℃ of water-baths, obtain leaching liquor;
B. steps A gained leaching liquor being crossed to 200 order filter clothes, collect filtrate, is under the 4000r/min condition centrifugal 30 minutes by filtrate in rotating speed, collects supernatant, obtains millet paste;
C. step B gained millet paste is adopted to reverse osmosis concentration, be concentrated into soluble solid and reach 20%, obtain concentrate;
D. step C gained concentrate is adopted to spray-drying, obtain cold cut green tea powder.
Embodiment 1～3 and comparative example 1 are compared, relatively cold cut green tea powder color, the content of caffeine, amino acid and Tea Polyphenols and other physicochemical properties.Wherein, the aberration determination methods is: get the 0.45mg instant tea powder, add the water that the 140mL temperature is 3～8 ℃, after the powder of receiving guest with tea dissolves, use colour difference meter to be measured; Amino acid content detects and adopts following method: with reference to QBT4067-2010 food industry instant tea appendix A .4.1 prepares test solution, refers again to the total quantitative determination of GB8314-2002 tea free amino acid and is detected; Polyphenol content is measured the detection method with reference to Tea Polyphenols in QBT4067-2010 food industry instant tea appendix A instant tea; Caffeine content is measured the detection method with reference to caffeine in QBT4067-2010 food industry instant tea appendix B instant tea, and result is as shown in table 1.
Table 1 embodiment 1～3 and comparative example's 1 comparative result
As shown in Table 1, yield, amino acid, the Tea Polyphenols of the cold cut green tea powder that the cold cut green tea powder that the present invention makes and hot water extracting technology make are more or less the same, and caffeine content is lower slightly, therefore can reduce the astringent taste of millet paste; The color difference analysis result shows that the present invention makes the millet paste L value of product cold water bubble and a value absolute value millet paste apparently higher than the hot water lixiviate, show millet paste brightness ratio hot water extracting technology that the cold cut green tea powder made of the present invention steeps with cold water greatly, color and luster is greener; Sensory review's result also confirms this conclusion simultaneously.Aspect cold cut, the cold cut green tea powder that the present invention makes also obviously is better than the cold cut green tea powder made by the hot water lixiviate, not only dissolve fully, and the tea powder of dissolution velocity specific heat flooding is fast.
Finally explanation is, above preferred embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is described in detail by above preferred embodiment, but those skilled in the art are to be understood that, can make various changes to it in the form and details, and not depart from the claims in the present invention book limited range.
Claims (9)
1. prepare the method for cold cut green tea powder, it is characterized in that, comprise the steps:
A. after green tea being pulverized, crossing 40～80 eye mesh screens, is that 1:10～1:30 adds deionized water by the feed liquid mass ratio, and sealing, be then lixiviate 10～30min under 100～400MPa condition in force value, obtains leaching liquor;
B. steps A gained leaching liquor is crossed to 150～300 order filter clothes, collecting filtrate is centrifugal 10～40min under 3000r/min～5500r/min condition at rotating speed, collects supernatant, obtains millet paste;
C. step B gained millet paste is concentrated into to soluble solid and reaches 16～22%, obtain concentrate;
D. be vacuum freeze drying 24-48 hour under-40～-70 ℃ of conditions in temperature after step C gained concentrate being frozen, obtain cold cut tea powder.
2. prepare according to claim 1 the method for cold cut green tea powder, it is characterized in that: in steps A, the feed liquid mass ratio is 1:15～1:30.
3. prepare according to claim 2 the method for cold cut green tea powder, it is characterized in that: in steps A, the feed liquid mass ratio is 1:15.
4. prepare according to claim 1 the method for cold cut green tea powder, it is characterized in that: in steps A, be lixiviate under 100～300MPa condition in force value.
5. prepare according to claim 4 the method for cold cut green tea powder, it is characterized in that: in steps A, be lixiviate under 200～300MPa condition in force value.
6. prepare according to claim 1 the method for cold cut green tea powder, it is characterized in that: in step C, described simmer down to reverse osmosis concentration.
7. according to the described method for preparing cold cut green tea powder of claim 1-6 any one, it is characterized in that: step D is after step C gained concentrate is frozen in temperature, to be vacuum freeze drying 36-48 hour under-40～-50 ℃ of conditions.
8. prepare according to claim 7 the method for cold cut green tea powder, it is characterized in that: step D is that by step C gained concentrate, freezing in temperature is vacuum freeze drying under-50 ℃ of conditions 36 hours.
9. the cold cut green tea powder that utilizes the described method of claim 1-8 any one to make.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104171149A (en) * | 2014-07-18 | 2014-12-03 | 大闽食品（漳州）有限公司 | Processing method for improving flowability of instant tea powder |
| CN104222350A (en) * | 2014-10-17 | 2014-12-24 | 西南大学 | Preparation method for tea leaves with high theaflavin content |
| CN104782829A (en) * | 2015-04-22 | 2015-07-22 | 西华大学 | Cold soluble type instant green tea and preparation method thereof |
| CN105685300A (en) * | 2016-02-25 | 2016-06-22 | 江苏康缘药业股份有限公司 | Flos carthami puer tea, instant flos carthami puer tea and preparing method of instant flos carthami puer tea |
| CN105713997A (en) * | 2016-01-19 | 2016-06-29 | 新疆正生农业资源开发研究院（有限公司） | Method for producing cichorium intybus fructose syrup |
| CN105831326A (en) * | 2016-04-12 | 2016-08-10 | 江苏强农农业技术服务有限公司 | A preparing method of fire-purging liver-protecting healthcare tea powder |
| CN107041438A (en) * | 2017-06-16 | 2017-08-15 | 南京融点食品科技有限公司 | A kind of extracting method of high green green tea concentrated liquid or instant powder |
| CN107753659A (en) * | 2017-11-15 | 2018-03-06 | 广东药科大学 | A kind of Weishanmajian tea tree extract and preparation method and application |
| CN109463491A (en) * | 2019-01-07 | 2019-03-15 | 刘安军 | A kind of instant green tea and preparation method thereof rich in chlorophillins |
| CN112056432A (en) * | 2020-09-10 | 2020-12-11 | 浙江茗皇天然食品开发股份有限公司 | Processing method of instant tea with characteristic components directionally enriched in double effects |
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| CN105713997A (en) * | 2016-01-19 | 2016-06-29 | 新疆正生农业资源开发研究院（有限公司） | Method for producing cichorium intybus fructose syrup |
| CN105685300A (en) * | 2016-02-25 | 2016-06-22 | 江苏康缘药业股份有限公司 | Flos carthami puer tea, instant flos carthami puer tea and preparing method of instant flos carthami puer tea |
| CN105831326A (en) * | 2016-04-12 | 2016-08-10 | 江苏强农农业技术服务有限公司 | A preparing method of fire-purging liver-protecting healthcare tea powder |
| CN107041438A (en) * | 2017-06-16 | 2017-08-15 | 南京融点食品科技有限公司 | A kind of extracting method of high green green tea concentrated liquid or instant powder |
| CN107753659A (en) * | 2017-11-15 | 2018-03-06 | 广东药科大学 | A kind of Weishanmajian tea tree extract and preparation method and application |
| CN109463491A (en) * | 2019-01-07 | 2019-03-15 | 刘安军 | A kind of instant green tea and preparation method thereof rich in chlorophillins |
| CN112056432A (en) * | 2020-09-10 | 2020-12-11 | 浙江茗皇天然食品开发股份有限公司 | Processing method of instant tea with characteristic components directionally enriched in double effects |
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