CN110250379A - Red date concentrated juice and its preparation process - Google Patents

Red date concentrated juice and its preparation process Download PDF

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Publication number
CN110250379A
CN110250379A CN201910705110.0A CN201910705110A CN110250379A CN 110250379 A CN110250379 A CN 110250379A CN 201910705110 A CN201910705110 A CN 201910705110A CN 110250379 A CN110250379 A CN 110250379A
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minutes
juice
red date
jujube
preparation process
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钟兴林
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Chongqing Worship Food Technology Co Ltd
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Chongqing Worship Food Technology Co Ltd
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    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
    • A23L2/00—Non-alcoholic beverages; Dry compositions or concentrates therefor; Their preparation
    • A23L2/02—Non-alcoholic beverages; Dry compositions or concentrates therefor; Their preparation containing fruit or vegetable juices
    • A23L2/04—Extraction of juices
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
    • A23L2/00—Non-alcoholic beverages; Dry compositions or concentrates therefor; Their preparation
    • A23L2/02—Non-alcoholic beverages; Dry compositions or concentrates therefor; Their preparation containing fruit or vegetable juices
    • A23L2/08—Concentrating or drying of juices
    • A23L2/10—Concentrating or drying of juices by heating or contact with dry gases
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
    • A23L2/00—Non-alcoholic beverages; Dry compositions or concentrates therefor; Their preparation
    • A23L2/52—Adding ingredients
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
    • A23L2/00—Non-alcoholic beverages; Dry compositions or concentrates therefor; Their preparation
    • A23L2/70—Clarifying or fining of non-alcoholic beverages; Removing unwanted matter
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
    • A23L2/00—Non-alcoholic beverages; Dry compositions or concentrates therefor; Their preparation
    • A23L2/70—Clarifying or fining of non-alcoholic beverages; Removing unwanted matter
    • A23L2/72—Clarifying or fining of non-alcoholic beverages; Removing unwanted matter by filtration
    • A23L2/74—Clarifying or fining of non-alcoholic beverages; Removing unwanted matter by filtration using membranes, e.g. osmosis, ultrafiltration
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
    • A23L2/00—Non-alcoholic beverages; Dry compositions or concentrates therefor; Their preparation
    • A23L2/70—Clarifying or fining of non-alcoholic beverages; Removing unwanted matter
    • A23L2/84—Clarifying or fining of non-alcoholic beverages; Removing unwanted matter using microorganisms or biological material, e.g. enzymes
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
    • A23L3/00—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs
    • A23L3/34—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs by treatment with chemicals
    • A23L3/3454—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs by treatment with chemicals in the form of liquids or solids
    • A23L3/3463—Organic compounds; Microorganisms; Enzymes
    • A23L3/3472—Compounds of undetermined constitution obtained from animals or plants
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23V—INDEXING SCHEME RELATING TO FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES AND LACTIC OR PROPIONIC ACID BACTERIA USED IN FOODSTUFFS OR FOOD PREPARATION
    • A23V2002/00—Food compositions, function of food ingredients or processes for food or foodstuffs

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Abstract

The invention discloses a kind of red date concentrated juice and its preparation process, the preparation process of the red date concentrated juice is the following steps are included: (1) jujube is cleaned, is dry, being enucleated；(2) it extracts；(3) it digests；(4) it clarifies；(5) ultrafiltration；(6) it is concentrated；(7) it sterilizes.Red date concentrated juice and its preparation process of the present invention are combined using extraction with enzymatic isolation method, and Extracting temperature is low, crushing juice rate is improved, while being effectively retained the nutritional ingredient in jujube, obtained red date concentrated juice clarity is good, antioxidant activity is high, nutritive value with higher.

Description

Red date concentrated juice and its preparation process
Technical field
The present invention relates to product processing technique fields, and in particular to a kind of red date concentrated juice and its preparation process.
Background technique
Jujube (Zizyphus jujube dates) is Rhamnaceae (Rhamnaceae) jujube jujube tree (Ziziphus Jujube Mill) fruit.In China, Xinjiang, Shanxi, Henan, Hebei are jujube main producing regions, and produced jujube kind includes writing Xinjiang jun dates, the Yellow River beach jujube, Xinzheng of Henan jujube, Hebei Fuping jujube, the Cangzhou Golden Chinese Date etc. of name, are enjoyed in the world Great fame.
Contain a large amount of active polysaccharide substance in jujube, the oligosaccharide that is mainly made of glucose and fructose, Arab Glycan and galacturonan etc.；And the multivitamins such as vitamin C abundant, riboflavin, thiamine, carrotene, niacin, Effect is taken a tonic or nourishing food to build up one's health with good, immune function of human body can be improved, enhance disease resistance.Modern Chinese herbal medicine is thought: jujube has invigorating the spleen Beneficial stomach, nourishing blood and tranquilization, mitigates pharmacological property, protection liver, anti-aging, anti-cancer tumor suppressor and other effects at benefiting qi and nourishing blood.
Jujube juice sugar rich in, organic acid, vitamin and mineral have stronger nutritious tonifying effect, and Attractive color, jujube is aromatic strongly fragrant, in sweet flavor palatable, is a kind of natural nourishing beverage.It is small in size that jujube juice is concentrated, nutritive value is high, and It can long term storage.
Red date concentrated juice is mainly using the method for extraction, in fruit juice production storage, fruit therein in the prior art The substances such as glue, cellulose, polyphenol easily cause flocculation, precipitating, generate muddiness, cause fruit juice stability poor.
Summary of the invention
Aiming at the above shortcomings existing in the prior art, technical problem to be solved by the invention is to provide a kind of jujube is dense Contracting juice and its preparation process, obtained red date concentrated juice clarity is good, and antioxidant activity is high, nutritive value with higher.
Object of the present invention is to what is be achieved through the following technical solutions:
A kind of preparation process of red date concentrated juice, comprising the following steps:
(1) jujube is cleaned, is dry, being enucleated；
(2) it extracts；
(3) it digests；
(4) it clarifies；
(5) ultrafiltration；
(6) it is concentrated；
(7) it sterilizes.
Preferably, the preparation process of the red date concentrated juice, comprising the following steps:
(1) jujube clean, be dry, stoning: select maturation, no disease and pests harm, without the dry jujube that rots for raw material, after being eluted with water, It is 40-60 minutes dry at 45-65 DEG C, stoning is taken out, enuleation date is obtained；
(2) it extracts: enuleation date is crushed as 20-60 mesh, after being mixed with 40-50 DEG C of water 1:(8-12 in mass ratio), then Be added enuleation date quality 0.01-0.1% antioxidant, 40-50 DEG C with 200-400 revs/min stirring 60-90 minutes, obtain Leaching liquor；
(3) digest: in leaching liquor be added leaching liquor quality 0.1-0.3% mixed enzyme, 40-50 DEG C with 200-400 turn/ Divide stirring 3-5 hours, then living in 95-100 DEG C of heat preservation enzyme deactivation in 3-6 minutes, obtains mixed liquor, mixed liquor is used into 300 mesh filter clothes Filtering, obtains jujube juice；
(4) clarify: clarifying agent is added in jujube juice, 40-50 DEG C with 200-400 revs/min stirring 30-50 minutes, Again 20-30 DEG C standing 2-4 hours, with 4000-6000 revs/min centrifugation 10-20 minutes, by supernatant -8~-14 DEG C place 5-10 hours, then 20-30 DEG C standing 15-25 hours, with 4000-6000 revs/min centrifugation 10-20 minutes, obtain clarified solution, wherein The additional amount of clarifying agent is the 0.2-2% of jujube juice quality；
(5) ultrafiltration: ultrafiltration will be carried out through the clarified solution that step (4) obtain, and will obtain filtrate, wherein the operating condition of ultrafiltration are as follows: Operating pressure 0.20-0.30MPa, 20-30 DEG C of operating temperature, 0.2-0.5 μm of filter sizes；
(6) be concentrated: filtrate in vacuum degree is 0.05-0.2MPa by 100 revs/min of Rotary Evaporators revolving speed of setting, and temperature is 50-60 DEG C of spin concentration to soluble solid is 55-65Brix, obtains inspissated juice；
(7) sterilize: by inspissated juice 130-140 DEG C sterilizing 5-10 seconds, cool down, obtain red date concentrated juice.
The mixed enzyme is the mixture of 50-70wt% pectase and 30-50wt% cellulase.
The antioxidant is one of morin, tuckahoe extracts, cassia seed extract or a variety of mixtures.
Preferably, the antioxidant is cassia seed extract.
It is highly preferred that the antioxidant is the mixture of tuckahoe extracts and cassia seed extract, the tuckahoe extracts Mass ratio with cassia seed extract is 1:(3-5).
The clarifying agent is modified calcium carbonate and/or gelatin solution.
Preferably, the clarifying agent is the mixture of modified calcium carbonate and gelatin solution, the modified calcium carbonate and gelatin The mass ratio 1:(4-6 of solution).
The preparation method of institute's gelatine solution is the following steps are included: be dissolved in 200-300mL20-30 DEG C of water for 4-6g gelatin In, 20-30 DEG C immersion 20-40 minutes, 200-300mL 90-98 DEG C water is added, with 200-400 revs/min of stirring to complete Dissolution, obtains gelatin solution.
The preparation method of the modified calcium carbonate the following steps are included:
(1) calcium carbonate is 30-50 minutes dry at 80-100 DEG C, then 200-300 DEG C heat preservation 60-80 minutes, obtain heat Handle calcium carbonate；
(2) by mass fraction be 20-30% acetic acid aqueous solution and water by volume (0.05-0.2): 100 mixing, obtain mixed Close liquid, add the chitosan of mixed liquor quality 2-6%, 50-60 DEG C with 200-400 revs/min stirring 20-40 minutes, obtain Chitosan solution；
(3) heat treatment calcium carbonate is added in chitosan solution, wherein the mass ratio of heat treatment calcium carbonate and chitosan For (6-10): 1,50-60 DEG C with 200-400 revs/min stirring 40-60 minutes, with 4000-6000 revs/min of centrifugation 10-20 points Clock, obtained solid is dry to constant weight at 80-100 DEG C, obtains modified calcium carbonate.
A kind of red date concentrated juice is prepared using any of the above-described method.
Red date concentrated juice and its preparation process of the present invention are combined using extraction with enzymatic isolation method, and Extracting temperature is low, improves Crushing juice rate, the nutritional ingredient being effectively retained in jujube, obtained red date concentrated juice clarity is good, and antioxidant activity is high, has Higher nutritive value.
Specific embodiment
In the present invention, if not refering in particular to, all devices and raw material is commercially available or the industry is common are following Method in embodiment is unless otherwise instructed conventional method in that art.
Jujube, the superfine grey jujube of Ruoqiang provided using Kuerle territory beautiful natural conditions and social customs of a place specialty firm.
Pectase, the pectase provided using the Nanning road Dong Henghua biotechnology Co., Ltd, enzyme activity 10000U/g.
Cellulase, the cellulase provided using the Nanning road Dong Henghua biotechnology Co., Ltd, enzyme activity 10000U/g。
Morin, No. CAS: 480-16-0, the morin provided using Xi'an all places Biotechnology Co., Ltd.
Tuckahoe extracts, the tuckahoe extracts provided using Xi'an Ze Bang Biotechnology Co., Ltd, water extraction extract ratio Example is 10:1, i.e., every 10kg Poria cocos obtains 1kg tuckahoe extracts.
Cassia seed extract, the cassia seed extract provided using Xi'an Ze Bang Biotechnology Co., Ltd, water extraction are mentioned Taking ratio is 10:1, i.e., every 10kg cassia seed obtains 1kg cassia seed extract.
Calcium carbonate, Shanghai Yuan Ye Biotechnology Co., Ltd provide, product number: S24297-500g.
Gelatin, the emerging Biotechnology Co., Ltd in Wuhan one hundred provide, food-grade.
Chitosan, the Shandong biotech inc land-sea Lan Sheng provide, deacetylation 90%, model: LS-J1.
Acetic acid, Shanghai Aladdin biochemical technology limited liability company provide, product number: A116167.
Remove the measurement of DPPH ability:
(1) red date concentrated juice 0.5ml is drawn respectively in 10ml colorimetric cylinder, and distilled water is added to supply 2ml, add 8.62 × 10-5mol/L DPPH alcoholic solution 2ml, reacts 30min after mixing, surveys its light absorption value (Ai), at wavelength 517nm with anhydrous skill Alcohol is as reference；
(2) red date concentrated juice 0.5ml is drawn respectively in 10ml colorimetric cylinder, is added distilled water to supply 2ml, is added anhydrous second Alcoholic solution 2ml reacts 30min after mixing, its light absorption value (Aj) is surveyed at wavelength 517nm, using dehydrated alcohol as reference；
(3) 8.62 × 10-5mol/L DPPH alcoholic solution 2ml is added in 10ml colorimetric cylinder, adds dehydrated alcohol 2ml, 30min is reacted after mixing, its light absorption value (A is surveyed at wavelength 517nm0), using dehydrated alcohol as reference；
The clearance rate (%) of DPPH=[1- (Ai-Aj)/A0]×100
Determination of light transmittance: using UV1000- type ultraviolet-visible spectrophotometer, using deionized water as reference liquid, The light transmittance of red date concentrated juice is measured under 660nm wavelength.
Embodiment 1
The preparation process of red date concentrated juice, comprising the following steps:
(1) jujube clean, be dry, stoning: select maturation, no disease and pests harm, without the dry jujube that rots for raw material, after being eluted with water, It is 20 minutes dry at 60 DEG C, stoning is taken out, enuleation date is obtained；
(2) extract: it is 40 mesh that enuleation date, which is crushed, with 45 DEG C of water after 1:10 mix in mass ratio, add be enucleated it is red The antioxidant of jujube quality 0.05% is stirred 75 minutes with 300 revs/min at 45 DEG C, obtains leaching liquor；
(3) it digests: the mixed enzyme of leaching liquor quality 0.2% being added in leaching liquor, it is small with 300 revs/min of stirrings 4 at 45 DEG C When, then it is living in 98 DEG C of heat preservation enzyme deactivations in 4 minutes, mixed liquor is obtained, mixed liquor is used into 300 mesh filter-cloth filterings, obtains jujube juice；
(4) it clarifies: clarifying agent is added in jujube juice, stirred 40 minutes at 45 DEG C with 300 revs/min, then quiet at 25 DEG C It sets 3 hours, is centrifuged 15 minutes with 5000 revs/min, obtains clarified solution, wherein the additional amount of clarifying agent is the 1.2% of jujube juice quality；
(5) ultrafiltration: ultrafiltration will be carried out through the clarified solution that step (4) obtain, and will obtain filtrate, wherein the operating condition of ultrafiltration are as follows: Operating pressure 0.25MPa, 25 DEG C of operating temperature, 0.5 μm of filter sizes；
(6) be concentrated: setting 100 revs/min of Rotary Evaporators revolving speed, by filtrate vacuum degree be 0.07MPa, temperature be 55 DEG C Spin concentration to soluble solid is 60Brix, obtains inspissated juice；
(7) it sterilizes: inspissated juice is sterilized 8 seconds at 135 DEG C, it is cooling, obtain red date concentrated juice.
The mixed enzyme is the mixture of 60wt% pectase and 40wt% cellulase.
The antioxidant is morin.
The clarifying agent is gelatin solution.
The preparation method of institute's gelatine solution is the following steps are included: 5g gelatin is dissolved in 25 DEG C of water of 250mL, at 25 DEG C It impregnates 30 minutes, adds 96 DEG C of water of 250mL, with 300 revs/min of stirrings to being completely dissolved, obtain gelatin solution.
Embodiment 2
The preparation process of red date concentrated juice, comprising the following steps:
(1) jujube clean, be dry, stoning: select maturation, no disease and pests harm, without the dry jujube that rots for raw material, after being eluted with water, It is 20 minutes dry at 60 DEG C, stoning is taken out, enuleation date is obtained；
(2) extract: it is 40 mesh that enuleation date, which is crushed, with 45 DEG C of water after 1:10 mix in mass ratio, add be enucleated it is red The antioxidant of jujube quality 0.05% is stirred 75 minutes with 300 revs/min at 45 DEG C, obtains leaching liquor；
(3) it digests: the mixed enzyme of leaching liquor quality 0.2% being added in leaching liquor, it is small with 300 revs/min of stirrings 4 at 45 DEG C When, then it is living in 98 DEG C of heat preservation enzyme deactivations in 4 minutes, mixed liquor is obtained, mixed liquor is used into 300 mesh filter-cloth filterings, obtains jujube juice；
(4) it clarifies: jujube juice being placed 8 hours at -12 DEG C, then stands 20 hours at 25 DEG C, with 5000 revs/min of centrifugations 15 Minute, obtain clarified solution；
(5) ultrafiltration: ultrafiltration will be carried out through the clarified solution that step (4) obtain, and will obtain filtrate, wherein the operating condition of ultrafiltration are as follows: Operating pressure 0.25MPa, 25 DEG C of operating temperature, 0.5 μm of filter sizes；
(6) be concentrated: setting 100 revs/min of Rotary Evaporators revolving speed, by filtrate vacuum degree be 0.07MPa, temperature be 55 DEG C Spin concentration to soluble solid is 60Brix, obtains inspissated juice；
(7) it sterilizes: inspissated juice is sterilized 8 seconds at 135 DEG C, it is cooling, obtain red date concentrated juice.
The mixed enzyme is the mixture of 60wt% pectase and 40wt% cellulase.
The antioxidant is morin.
Embodiment 3
The preparation process of red date concentrated juice, comprising the following steps:
(1) jujube clean, be dry, stoning: select maturation, no disease and pests harm, without the dry jujube that rots for raw material, after being eluted with water, It is 20 minutes dry at 60 DEG C, stoning is taken out, enuleation date is obtained；
(2) extract: it is 40 mesh that enuleation date, which is crushed, with 45 DEG C of water after 1:10 mix in mass ratio, add be enucleated it is red The antioxidant of jujube quality 0.05% is stirred 75 minutes with 300 revs/min at 45 DEG C, obtains leaching liquor；
(3) it digests: the mixed enzyme of leaching liquor quality 0.2% being added in leaching liquor, it is small with 300 revs/min of stirrings 4 at 45 DEG C When, then it is living in 98 DEG C of heat preservation enzyme deactivations in 4 minutes, mixed liquor is obtained, mixed liquor is used into 300 mesh filter-cloth filterings, obtains jujube juice；
(4) it clarifies: clarifying agent is added in jujube juice, stirred 40 minutes at 45 DEG C with 300 revs/min, then quiet at 25 DEG C It sets 3 hours, is centrifuged 15 minutes with 5000 revs/min, supernatant is placed 8 hours at -12 DEG C, then stand 20 hours at 25 DEG C, with 5000 revs/min are centrifuged 15 minutes, obtain clarified solution, wherein the additional amount of clarifying agent is the 1.2% of jujube juice quality；
(5) ultrafiltration: ultrafiltration will be carried out through the clarified solution that step (4) obtain, and will obtain filtrate, wherein the operating condition of ultrafiltration are as follows: Operating pressure 0.25MPa, 25 DEG C of operating temperature, 0.5 μm of filter sizes；
(6) be concentrated: setting 100 revs/min of Rotary Evaporators revolving speed, by filtrate vacuum degree be 0.07MPa, temperature be 55 DEG C Spin concentration to soluble solid is 60Brix, obtains inspissated juice；
(7) it sterilizes: inspissated juice is sterilized 8 seconds at 135 DEG C, it is cooling, obtain red date concentrated juice.
The mixed enzyme is the mixture of 60wt% pectase and 40wt% cellulase.
The antioxidant is morin.
The clarifying agent is gelatin solution.
The preparation method of institute's gelatine solution is the following steps are included: 5g gelatin is dissolved in 25 DEG C of water of 250mL, at 25 DEG C It impregnates 30 minutes, adds 96 DEG C of water of 250mL, with 300 revs/min of stirrings to being completely dissolved, obtain gelatin solution.
Embodiment 4
Substantially the same manner as Example 3, difference is only that: the antioxidant is tuckahoe extracts.
Embodiment 5
Substantially the same manner as Example 4, difference is only that: the antioxidant is cassia seed extract.
Embodiment 6
The preparation process of red date concentrated juice, comprising the following steps:
(1) jujube clean, be dry, stoning: select maturation, no disease and pests harm, without the dry jujube that rots for raw material, after being eluted with water, It is 20 minutes dry at 60 DEG C, stoning is taken out, enuleation date is obtained；
(2) extract: it is 40 mesh that enuleation date, which is crushed, with 45 DEG C of water after 1:10 mix in mass ratio, add be enucleated it is red The antioxidant of jujube quality 0.05% is stirred 75 minutes with 300 revs/min at 45 DEG C, obtains leaching liquor；
(3) it digests: the mixed enzyme of leaching liquor quality 0.2% being added in leaching liquor, it is small with 300 revs/min of stirrings 4 at 45 DEG C When, then it is living in 98 DEG C of heat preservation enzyme deactivations in 4 minutes, mixed liquor is obtained, mixed liquor is used into 300 mesh filter-cloth filterings, obtains jujube juice；
(4) it clarifies: clarifying agent is added in jujube juice, stirred 40 minutes at 45 DEG C with 300 revs/min, then quiet at 25 DEG C It sets 3 hours, is centrifuged 15 minutes with 5000 revs/min, supernatant is placed 8 hours at -12 DEG C, then stand 20 hours at 25 DEG C, with 5000 revs/min are centrifuged 15 minutes, obtain clarified solution, wherein the additional amount of clarifying agent is the 1.2% of jujube juice quality；
(5) ultrafiltration: ultrafiltration will be carried out through the clarified solution that step (4) obtain, and will obtain filtrate, wherein the operating condition of ultrafiltration are as follows: Operating pressure 0.25MPa, 25 DEG C of operating temperature, 0.5 μm of filter sizes；
(6) be concentrated: setting 100 revs/min of Rotary Evaporators revolving speed, by filtrate vacuum degree be 0.07MPa, temperature be 55 DEG C Spin concentration to soluble solid is 60Brix, obtains inspissated juice；
(7) it sterilizes: inspissated juice is sterilized 8 seconds at 135 DEG C, it is cooling, obtain red date concentrated juice.
The mixed enzyme is the mixture of 60wt% pectase and 40wt% cellulase.
The antioxidant is the mixture of tuckahoe extracts and cassia seed extract, and the tuckahoe extracts and cassia seed mention The mass ratio for taking object is 1:4.
The clarifying agent is gelatin solution.
The preparation method of institute's gelatine solution is the following steps are included: 5g gelatin is dissolved in 25 DEG C of water of 250mL, at 25 DEG C It impregnates 30 minutes, adds 96 DEG C of water of 250mL, with 300 revs/min of stirrings to being completely dissolved, obtain gelatin solution.
The light transmittance of obtained red date concentrated juice: 85.6%, remove DPPH ability 52.5%.
Embodiment 7
The preparation process of red date concentrated juice, comprising the following steps:
(1) jujube clean, be dry, stoning: select maturation, no disease and pests harm, without the dry jujube that rots for raw material, after being eluted with water, It is 20 minutes dry at 60 DEG C, stoning is taken out, enuleation date is obtained；
(2) extract: it is 40 mesh that enuleation date, which is crushed, with 45 DEG C of water after 1:10 mix in mass ratio, add be enucleated it is red The antioxidant of jujube quality 0.05% is stirred 75 minutes with 300 revs/min at 45 DEG C, obtains leaching liquor；
(3) it digests: the mixed enzyme of leaching liquor quality 0.2% being added in leaching liquor, it is small with 300 revs/min of stirrings 4 at 45 DEG C When, then it is living in 98 DEG C of heat preservation enzyme deactivations in 4 minutes, mixed liquor is obtained, mixed liquor is used into 300 mesh filter-cloth filterings, obtains jujube juice；
(4) it clarifies: clarifying agent is added in jujube juice, stirred 40 minutes at 45 DEG C with 300 revs/min, then quiet at 25 DEG C It sets 3 hours, is centrifuged 15 minutes with 5000 revs/min, supernatant is placed 8 hours at -12 DEG C, then stand 20 hours at 25 DEG C, with 5000 revs/min are centrifuged 15 minutes, obtain clarified solution, wherein the additional amount of clarifying agent is the 1.2% of jujube juice quality；
(5) ultrafiltration: ultrafiltration will be carried out through the clarified solution that step (4) obtain, and will obtain filtrate, wherein the operating condition of ultrafiltration are as follows: Operating pressure 0.25MPa, 25 DEG C of operating temperature, 0.5 μm of filter sizes；
(6) be concentrated: setting 100 revs/min of Rotary Evaporators revolving speed, by filtrate vacuum degree be 0.07MPa, temperature be 55 DEG C Spin concentration to soluble solid is 60Brix, obtains inspissated juice；
(7) it sterilizes: inspissated juice is sterilized 8 seconds at 135 DEG C, it is cooling, obtain red date concentrated juice.
The mixed enzyme is the mixture of 60wt% pectase and 40wt% cellulase.
The antioxidant is the mixture of tuckahoe extracts and cassia seed extract, and the tuckahoe extracts and cassia seed mention The mass ratio for taking object is 1:4.
The clarifying agent is modified calcium carbonate.
The preparation method of the modified calcium carbonate the following steps are included:
(1) calcium carbonate is 40 minutes dry at 90 DEG C, then 70 minutes are kept the temperature at 250 DEG C, obtain heat treatment calcium carbonate；
(2) by mass fraction be 25% acetic acid aqueous solution and water 0.1:100 is mixed by volume, obtain mixed liquor, then plus The chitosan for entering mixed liquor quality 4% is stirred 30 minutes with 300 revs/min at 55 DEG C, obtains chitosan solution；
(3) heat treatment calcium carbonate is added in chitosan solution, wherein the mass ratio of heat treatment calcium carbonate and chitosan For 8:1, is stirred 50 minutes at 55 DEG C with 300 revs/min, be centrifuged 15 minutes with 5000 revs/min, obtained solid is dried extremely at 90 DEG C Constant weight obtains modified calcium carbonate.
The light transmittance of obtained red date concentrated juice: 86.2%, remove DPPH ability 54.7%.
Embodiment 8
The preparation process of red date concentrated juice, comprising the following steps:
(1) jujube clean, be dry, stoning: select maturation, no disease and pests harm, without the dry jujube that rots for raw material, after being eluted with water, It is 20 minutes dry at 60 DEG C, stoning is taken out, enuleation date is obtained；
(2) extract: it is 40 mesh that enuleation date, which is crushed, with 45 DEG C of water after 1:10 mix in mass ratio, add be enucleated it is red The antioxidant of jujube quality 0.05% is stirred 75 minutes with 300 revs/min at 45 DEG C, obtains leaching liquor；
(3) it digests: the mixed enzyme of leaching liquor quality 0.2% being added in leaching liquor, it is small with 300 revs/min of stirrings 4 at 45 DEG C When, then it is living in 98 DEG C of heat preservation enzyme deactivations in 4 minutes, mixed liquor is obtained, mixed liquor is used into 300 mesh filter-cloth filterings, obtains jujube juice；
(4) it clarifies: clarifying agent is added in jujube juice, stirred 40 minutes at 45 DEG C with 300 revs/min, then quiet at 25 DEG C It sets 3 hours, is centrifuged 15 minutes with 5000 revs/min, supernatant is placed 8 hours at -12 DEG C, then stand 20 hours at 25 DEG C, with 5000 revs/min are centrifuged 15 minutes, obtain clarified solution, wherein the additional amount of clarifying agent is the 1.2% of jujube juice quality；
(5) ultrafiltration: ultrafiltration will be carried out through the clarified solution that step (4) obtain, and will obtain filtrate, wherein the operating condition of ultrafiltration are as follows: Operating pressure 0.25MPa, 25 DEG C of operating temperature, 0.5 μm of filter sizes；
(6) be concentrated: setting 100 revs/min of Rotary Evaporators revolving speed, by filtrate vacuum degree be 0.07MPa, temperature be 55 DEG C Spin concentration to soluble solid is 60Brix, obtains inspissated juice；
(7) it sterilizes: inspissated juice is sterilized 8 seconds at 135 DEG C, it is cooling, obtain red date concentrated juice.
The mixed enzyme is the mixture of 60wt% pectase and 40wt% cellulase.
The antioxidant is the mixture of tuckahoe extracts and cassia seed extract, and the tuckahoe extracts and cassia seed mention The mass ratio for taking object is 1:4.
The clarifying agent is the mixture of modified calcium carbonate and gelatin solution, and the modified calcium carbonate and gelatin solution press matter Amount compares 1:5.
The preparation method of institute's gelatine solution is the following steps are included: 5g gelatin is dissolved in 25 DEG C of water of 250mL, at 25 DEG C It impregnates 30 minutes, adds 96 DEG C of water of 250mL, with 300 revs/min of stirrings to being completely dissolved, obtain gelatin solution.
The preparation method of the modified calcium carbonate the following steps are included:
(1) calcium carbonate is 40 minutes dry at 90 DEG C, then 70 minutes are kept the temperature at 250 DEG C, obtain heat treatment calcium carbonate；
(2) by mass fraction be 25% acetic acid aqueous solution and water 0.1:100 is mixed by volume, obtain mixed liquor, then plus The chitosan for entering mixed liquor quality 4% is stirred 30 minutes with 300 revs/min at 55 DEG C, obtains chitosan solution；
(3) heat treatment calcium carbonate is added in chitosan solution, wherein the mass ratio of heat treatment calcium carbonate and chitosan For 8:1, is stirred 50 minutes at 55 DEG C with 300 revs/min, be centrifuged 15 minutes with 5000 revs/min, obtained solid is dried extremely at 90 DEG C Constant weight obtains modified calcium carbonate.
The light transmittance of obtained red date concentrated juice: 94.9%, remove DPPH ability 61.6%.
Test case 1
The light transmittance of the red date concentrated juice of embodiment 1-5 is tested, specific test result is shown in Table 1.
1 red date concentrated juice light transmittance test result table of table
Light transmittance, %
Embodiment 1 71.2
Embodiment 2 67.5
Embodiment 3 78.8
Embodiment 4 79.2
Embodiment 5 80.4
Embodiment 3 is combined using clarifying agent and freezing processing to be clarified, and the clarity of red date concentrated juice is remarkably improved.
Embodiment 3-5 optimizes antioxidant, preferable using cassia seed extract effect, this may be because of cassia seed Extract has better inoxidizability, it is suppressed that red date concentrated juice improves light transmittance in the generation brown stain of process.
Test case 2
The removing DPPH ability of the embodiment 3-5 red date concentrated juice being prepared is tested, specific test result It is shown in Table 2.
2 red date concentrated juice of table removes DPPH aptitude tests result table
Remove DPPH ability, %
Embodiment 3 43.7
Embodiment 4 44.5
Embodiment 5 45.8

Claims (10)

1. a kind of preparation process of red date concentrated juice, which comprises the following steps:
(1) jujube is cleaned, is dry, being enucleated；
(2) it extracts；
(3) it digests；
(4) it clarifies；
(5) ultrafiltration；
(6) it is concentrated；
(7) it sterilizes.
2. the preparation process of red date concentrated juice as described in claim 1, which comprises the following steps:
(1) jujube is cleaned, is dry, being enucleated: selecting maturation, no disease and pests harm, nothing and rots dry jujube for raw material, after being eluted with water, in 45- 65 DEG C 40-60 minutes dry, takes out stoning, obtains enuleation date；
(2) it extracts: enuleation date being crushed and is added after being mixed with 40-50 DEG C of water 1:(8-12 in mass ratio) for 20-60 mesh The antioxidant of enuleation date quality 0.01-0.1%, 40-50 DEG C stirring 60-90 minutes, obtain leaching liquor；
(3) digest: in leaching liquor be added leaching liquor quality 0.1-0.3% mixed enzyme, 40-50 DEG C stirring 3-5 hours, then 95-100 DEG C of heat preservation enzyme deactivation in 3-6 minutes is living, obtains mixed liquor, and mixed liquor is used 300 mesh filter-cloth filterings, obtains jujube juice；
(4) clarify: clarifying agent be added in jujube juice, 40-50 DEG C stirring 30-50 minutes, then in 20-30 DEG C of standing 2-4 Hour, with 4000-6000 revs/min centrifugation 10-20 minutes, by supernatant -8~-14 DEG C placement 5-10 hours, then in 20-30 DEG C stand 15-25 hours, with 4000-6000 revs/min centrifugation 10-20 minutes, obtain clarified solution, wherein the additional amount of clarifying agent is red The 0.2-2% of jujube juice quality；
(5) ultrafiltration: ultrafiltration will be carried out through the clarified solution that step (4) obtain, and will obtain filtrate, wherein the operating condition of ultrafiltration are as follows: work Pressure 0.20-0.30MPa, 20-30 DEG C of operating temperature, 0.2-0.5 μm of filter sizes；
(6) be concentrated: by filtrate in vacuum degree 0.05-0.2MPa, temperature is 50-60 DEG C, and to be concentrated into soluble solid be 55- 65Brix obtains inspissated juice；
(7) sterilize: by inspissated juice 130-140 DEG C sterilizing 5-10 seconds, cool down, obtain red date concentrated juice.
3. the preparation process of red date concentrated juice as claimed in claim 2, which is characterized in that the mixed enzyme is 50-70wt% The mixture of pectase and 30-50wt% cellulase.
4. the preparation process of red date concentrated juice as claimed in claim 2, which is characterized in that the antioxidant is morin, Fu One of Siberian cocklebur extract, cassia seed extract or a variety of mixtures.
5. the preparation process of red date concentrated juice as claimed in claim 4, which is characterized in that the antioxidant is cassia seed extraction Object.
6. the preparation process of red date concentrated juice as claimed in claim 4, which is characterized in that the antioxidant is tuckahoe extracts With the mixture of cassia seed extract, the mass ratio of the tuckahoe extracts and cassia seed extract is 1:(3-5).
7. the preparation process of red date concentrated juice as claimed in claim 2, which is characterized in that the clarifying agent is modified calcium carbonate And/or gelatin solution.
8. the preparation process of red date concentrated juice as claimed in claim 7, which is characterized in that the preparation method of institute's gelatine solution The following steps are included: 4-6g gelatin is dissolved in 200-300mL20-30 DEG C of water, 20-30 DEG C immersion 20-40 minutes, add 200-300mL90-98 DEG C of water stirs to being completely dissolved, obtains gelatin solution.
9. the preparation process of red date concentrated juice as claimed in claim 7, which is characterized in that the preparation side of the modified calcium carbonate Method the following steps are included:
(1) calcium carbonate is 30-50 minutes dry at 80-100 DEG C, then 200-300 DEG C heat preservation 60-80 minutes, be heat-treated Calcium carbonate；
(2) by mass fraction be 20-30% acetic acid aqueous solution and water by volume (0.05-0.2): 100 mixing, must mix Liquid adds the chitosan of mixed liquor quality 2-6%, 50-60 DEG C stirring 20-40 minutes, obtain chitosan solution；
(3) heat treatment calcium carbonate is added in chitosan solution, wherein the mass ratio of heat treatment calcium carbonate and chitosan is (6- 10): 1,50-60 DEG C stirring 40-60 minutes, with 4000-6000 revs/min centrifugation 10-20 minutes, obtained solid is in 80-100 It is DEG C dry to constant weight, obtain modified calcium carbonate.
10. a kind of red date concentrated juice, which is characterized in that be prepared using any one of claim 1-9 method.
CN201910705110.0A 2019-08-01 2019-08-01 Red date concentrated juice and its preparation process Withdrawn CN110250379A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111955628A (en) * 2020-08-31 2020-11-20 石河子大学 Preparation method of concentrated fruit juice
CN113234562A (en) * 2021-06-22 2021-08-10 山西省农业科学院果树研究所 Preparation process of low-methanol red jujube dry red wine
CN114271417A (en) * 2020-09-26 2022-04-05 三原美乐绿色工程科技有限责任公司 Method and device for quickly extracting red date juice at low temperature

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111955628A (en) * 2020-08-31 2020-11-20 石河子大学 Preparation method of concentrated fruit juice
CN114271417A (en) * 2020-09-26 2022-04-05 三原美乐绿色工程科技有限责任公司 Method and device for quickly extracting red date juice at low temperature
CN113234562A (en) * 2021-06-22 2021-08-10 山西省农业科学院果树研究所 Preparation process of low-methanol red jujube dry red wine

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