阅读说明：本技术 一种绿茶茶多酚豆奶粉的制备方法 (Preparation method of green tea polyphenol soybean milk powder ) 是由 惠阳 周秀悄 陈文豪 陈光英 于 2021-09-18 设计创作，主要内容包括：本发明提供一种绿茶茶多酚豆奶粉的制备方法,本发明由重量份为20份-50份的豆奶粉、10份-30份的绿茶粉、0.05份-0.1份的茶多酚、10份-20份的全脂奶粉、10份-15份的白砂糖、10份-25份的椰浆粉、5份-8份的腰果梨粉、0.5份-1份的羧甲基纤维素钠和0.8份-1.2份食盐制得,本发明制得的绿茶茶多酚豆奶粉品质佳,口感好。(The invention provides a preparation method of green tea polyphenol soymilk powder, which is prepared from 20-50 parts by weight of soymilk powder, 10-30 parts by weight of green tea powder, 0.05-0.1 part by weight of tea polyphenol, 10-20 parts by weight of whole milk powder, 10-15 parts by weight of white granulated sugar, 10-25 parts by weight of coconut milk powder, 5-8 parts by weight of cashew apple powder, 0.5-1 part by weight of sodium carboxymethylcellulose and 0.8-1.2 parts by weight of salt.)

1. The green tea polyphenol soymilk powder is characterized by being prepared from 20-50 parts by weight of soymilk powder, 10-30 parts by weight of green tea powder, 0.05-0.1 part by weight of tea polyphenol, 10-20 parts by weight of whole milk powder, 10-15 parts by weight of white granulated sugar, 10-25 parts by weight of coconut milk powder, 5-8 parts by weight of cashew apple powder, 0.5-1 part by weight of sodium carboxymethylcellulose and 0.8-1.2 parts by weight of salt.

2. The method for preparing green tea polyphenol soymilk powder as claimed in claim 1, wherein the raw materials are mixed by a three-dimensional mixer at a rotation speed of 150-.

3. The method for preparing green tea polyphenol soymilk powder as claimed in claim 1, wherein the method for preparing green tea powder comprises the following steps:

s1, screening raw materials: picking fresh green tea leaves, placing in a room, spreading, airing and drying in the shade, wherein the thickness of the spread leaves is 2cm, and the spreading and airing time is 4-6 h;

s2, steam fixation: carrying out steam enzyme deactivation on the spread and dried tea leaves, wherein the steam speed is 220r/min, the dehydration speed is 1000r/min, and the enzyme deactivation temperature is 120 ℃;

s3, rolling: spreading the enzyme-removed tea leaves for cooling at 35-40 deg.C for 20-25min, and twisting;

s4, drying: drying the rolled tea leaves by microwave at the transmission speed of 350r/min and the microwave power of 7 multiplied by 850W for 30-50 min;

s5, superfine grinding: pulverizing dried folium Camelliae sinensis with ultramicro pulverizer and ultralow temperature refrigeration equipment, and grinding green tea into 300 mesh green tea powder at-25 deg.C.

4. The green tea polyphenol soymilk powder of claim 1, wherein the green tea is Hainan Baisha green tea.

5. The method for preparing the green tea polyphenol soymilk powder as claimed in claim 1, which is characterized by comprising the following steps:

(1) soybean milk: soaking high-quality soybeans in hot water with the water temperature of 50 ℃ for 8 hours, peeling the soybeans by rubbing with hands, and grinding the soybeans into soybean milk by using a grinder, wherein the mass ratio of the soybeans to the water is 1: 5;

(2) boiling the soybean milk: boiling the soybean milk, skimming froth, and homogenizing the boiled soybean milk under three different pressures of 15MPa, 30MPa and 60MPa for 30min for 1 time to obtain cooked soybean milk;

(3) and (3) drying: drying the boiled soybean milk by a spray drying method, spraying the dried soybean milk into a drying chamber under the pressure of 5MPa, and carrying out spray drying at the air inlet temperature of 120-125 ℃ and the air exhaust temperature of 90-95 ℃ to obtain the soybean milk powder.

6. The method for preparing green tea polyphenol soymilk powder as claimed in claim 1, wherein the method for preparing tea polyphenol comprises the following steps: adding distilled water into green tea powder according to the material liquid mass ratio of 1:20, performing ultrasonic extraction for 1h with the ultrasonic power of 200W to obtain extract, and performing vacuum concentration and low-temperature freeze drying to obtain green tea polyphenol.

7. The method for preparing the green tea polyphenol soymilk powder as claimed in claim 6, wherein the reduced pressure concentration is 1/3-1/5 which is reduced to the original volume at 30-40 ℃, the low temperature freeze drying temperature is-10 to-5 ℃, and the freezing time is 1-2 h.

Technical Field

The invention relates to the field of soymilk preparation, in particular to a preparation method of green tea polyphenol soymilk powder.

Background

Tea polyphenol (tea polyphenol) is the most abundant and characteristic active component of tea, which contains catechins (flavanols), flavones and flavonols, anthocyanidins and phenolic acids and dephenolic acids, has health care effects of antioxidation, anticancer, radiation protection, antivirus, blood sugar and blood fat reduction and the like, and is known as a treasure for health preservation in the 21 st century. The green tea is non-fermented tea, is generally processed by 3 procedures of fixation, rolling and drying, and has the quality characteristics of three greens, namely green tea, green liquor and green leaf bottom. Modern scientific research proves that the highest content of tea polyphenol in green tea is used in various kinds of tea. The Baisha green tea is grown in meteorite pit of autonomous county of Baishali nations in the core area of Hainan ecology, has the characteristics of green and moist color, tight and thin strip, yellow green and bright soup color, thick and sweet taste and clear and high and lasting fragrance, and enters the national geographical sign products in 2004.

The soybean milk mainly comprises soybean protein, lecithin and soybean oil, and can form a good milky mixed system by dispersing the soybean milk in water, so that the soybean milk is a healthy food which is praised by nutritionists as green milk. The soybean milk contains various vitamins, minerals and various amino acids necessary for human body, has the mutual assistance of animal and plant proteins, can promote the reasonable balance of nutrient components, can meet the requirements of human body on protein after being eaten for a long time, can reduce cholesterol, improve the antivirus and tumor capabilities of human body, and is the best health food for promoting the development of infants, enhancing intelligence and preventing aging.

The national intellectual property office respectively discloses an invention patent with publication number CN101011128B and name 'a soymilk tea powder and a preparation method thereof' at 2007.8.8, the patent discloses a soymilk tea powder and a preparation method thereof, which consists of soymilk powder and fresh old tea powder; 2015.2.18 discloses an invention patent with publication number CN104351350B, entitled "production method of instant green tea soymilk powder", which relates to a production method of instant green tea soymilk powder, and consists of two components of soymilk powder and fresh old tea powder.

The soymilk tea powder manufactured in the patent is an important component of a finished milk tea product, but the whole milk tea formula is not involved, the source of the used green tea is not clear, the quality of the tea powder cannot be guaranteed, and the quality of the milk tea is directly influenced.

Disclosure of Invention

Therefore, the invention provides a preparation method of green tea polyphenol soymilk powder, which is used for determining the selection type of green tea and preparing green tea powder by a specific process, thereby ensuring the quality of the invention.

The technical scheme of the invention is realized as follows:

the green tea and tea polyphenol soymilk powder is prepared from 20 to 50 parts by weight of soymilk powder, 10 to 30 parts by weight of green tea powder, 0.05 to 0.1 part by weight of tea polyphenol, 10 to 20 parts by weight of whole milk powder, 10 to 15 parts by weight of white granulated sugar, 10 to 25 parts by weight of coconut milk powder, 5 to 8 parts by weight of cashew apple powder, 0.5 to 1 part by weight of sodium carboxymethylcellulose and 0.8 to 1.2 parts by weight of salt.

Further, the preparation method of the green tea polyphenol soymilk powder comprises the steps of mixing the raw materials to prepare a green tea polyphenol soymilk semi-finished product, and sterilizing and disinfecting the green tea polyphenol soymilk semi-finished product to prepare the green tea polyphenol soymilk powder.

Further, the mixing is carried out by adopting a three-dimensional mixer, the rotating speed is 150-.

Further, the sterilization and disinfection is carried out at the temperature of 100-150 ℃ for 25-35 min.

Further, the preparation method of the green tea powder comprises the following steps:

s1, screening raw materials: picking fresh green tea leaves, placing in a room, spreading and drying in the shade for 4-6h, wherein the thickness of the spread leaves is 2 cm.

S2, steam fixation: and (3) deactivating enzyme of the spread and dried tea leaves by steam at the speed of 220r/min, the dehydration speed of 1000r/min and the deactivation temperature of 120 ℃.

S3, rolling: spreading the enzyme-removed tea leaves for cooling at 35-40 deg.C for 20-25min, and twisting.

S4, drying: drying the rolled tea leaves by microwave at the transmission speed of 350r/min and the microwave power of 7 multiplied by 850W for 30-50 min.

S5, superfine grinding: pulverizing dried folium Camelliae sinensis with ultramicro pulverizer and ultralow temperature refrigeration equipment, and grinding green tea into 300 mesh green tea powder at-25 deg.C.

Further, the green tea is Hainan Baisha green tea.

Further, the preparation method of the soybean milk powder comprises the following steps:

(1) soybean milk: soaking high-quality soybean in hot water with the water temperature of 50 ℃ for 8h, peeling with hands, and grinding into soybean milk with a grinder, wherein the mass ratio of soybean to water is 1: 5.

(2) Boiling the soybean milk: boiling the soybean milk, skimming froth, and homogenizing the cooked soybean milk under three different pressures of 15MPa, 30MPa and 60MPa respectively for 1 time at 30min to obtain the cooked soybean milk.

(3) And (3) drying: drying the boiled soybean milk by a spray drying method, spraying the dried soybean milk into a drying chamber under the pressure of 5MPa, and carrying out spray drying at the air inlet temperature of 120-125 ℃ and the air exhaust temperature of 90-95 ℃ to obtain the soybean milk powder. According to the invention, no additive is added in the prepared soybean milk powder, so that the nutritional ingredients of soybeans are fully retained, and meanwhile, the stability of the finished product is improved by adopting a three-stage homogenization mode.

Further, the preparation method of the green tea polyphenol comprises the following steps: adding distilled water into green tea powder according to the material liquid mass ratio of 1:20, performing ultrasonic extraction for 1h with the ultrasonic power of 200W to obtain extract, and performing vacuum concentration and low-temperature freeze drying to obtain green tea polyphenol.

Further, the vacuum concentration is carried out at the temperature of 30-40 ℃ until the volume is 1/3-1/5 of the original volume, the low-temperature freeze drying temperature is-10 to-5 ℃, and the freezing time is 1-2 hours.

Compared with the prior art, the invention has the beneficial effects that:

according to the preparation method of the green tea polyphenol soymilk powder, the prepared green tea polyphenol soymilk powder has a fragrance all around, the soymilk powder, the green tea powder and the cashew apple are mutually coordinated and matched, the mouthfeel is mellow, and the beany flavor is effectively inhibited. According to the invention, the Baisha green tea is used as a raw material, and the green tea powder is prepared through a reasonable green tea powder preparation process, so that the product quality is improved.

The invention uses the soymilk powder, the green tea and the cashew apple to prepare the soymilk powder for the first time, not only improves the taste of the finished product, but also enriches the nutritional ingredients of the product and prolongs the storage time of the product.

Drawings

FIG. 1 HPCE picture of green tea polyphenols

Detailed Description

In order to better understand the technical content of the invention, specific examples are provided below to further illustrate the invention.

The experimental methods used in the examples of the present invention are all conventional methods unless otherwise specified.

The materials, reagents and the like used in the examples of the present invention can be obtained commercially without specific description.

Example 1 Green tea polyphenols soymilk powder

The green tea polyphenol soymilk powder is prepared from 38 parts by weight of soymilk powder, 20 parts by weight of green tea powder, 0.05 part by weight of tea polyphenol, 10 parts by weight of whole milk powder, 10 parts by weight of white granulated sugar, 15 parts by weight of coconut milk powder, 5 parts by weight of cashew apple powder, 0.5 part by weight of sodium carboxymethylcellulose and 1 part by weight of salt.

Example 2 Green tea polyphenols soymilk powder

The green tea polyphenol soymilk powder is prepared from 20 parts by weight of soymilk powder, 20 parts by weight of green tea powder, 0.1 part by weight of tea polyphenol, 15 parts by weight of whole milk powder, 10 parts by weight of white granulated sugar, 25 parts by weight of coconut milk powder, 8 parts by weight of cashew apple powder, 0.7 part by weight of sodium carboxymethylcellulose and 1 part by weight of salt.

Example 3 Green tea polyphenols soymilk powder

The green tea polyphenol soymilk powder is prepared from 40 parts by weight of soymilk powder, 10 parts by weight of green tea powder, 0.08 part by weight of tea polyphenol, 10 parts by weight of whole milk powder, 13 parts by weight of white granulated sugar, 20 parts by weight of coconut milk powder, 5 parts by weight of cashew apple powder, 0.5 part by weight of sodium carboxymethylcellulose and 1 part by weight of salt.

Example 4 Green tea polyphenols soymilk powder

The green tea polyphenol soymilk powder is prepared from 50 parts by weight of soymilk powder, 10 parts by weight of green tea powder, 0.07 part by weight of tea polyphenol, 10 parts by weight of whole milk powder, 10 parts by weight of white granulated sugar, 13 parts by weight of coconut milk powder, 5 parts by weight of cashew apple powder, 0.7 part by weight of sodium carboxymethylcellulose and 0.8 part by weight of salt.

EXAMPLES 1-EXAMPLE 4 preparation of Green tea polyphenols soymilk powder

1. Preparation of green tea powder

S1: screening raw materials: picking the crude old fresh leaves of the Baisha green tea, placing the leaves indoors, spreading and drying in the air in the shade, wherein the thickness of the spread leaves is 2cm, and the spreading and drying time is 5 h.

S2, steam fixation: and (3) deactivating enzyme of the spread and dried tea leaves by steam at the speed of 220r/min, the dehydration speed of 1000r/min and the deactivation temperature of 120 ℃.

S3, rolling: and spreading and cooling the de-enzymed tea leaves, and rolling at 37 ℃ for 25 min.

S4, drying: drying the rolled tea leaves by microwave at the transmission speed of 350r/min and the microwave power of 7 multiplied by 850W for 40 min.

S5, superfine grinding: placing the dried tea into an ultralow temperature refrigeration device, freezing to-25 ℃, and grinding the tea into 300-mesh green tea powder by using an ultrafine grinder.

2. Preparation of green tea polyphenol soymilk powder

Mixing the above raw materials in a three-dimensional mixer at a rotation speed of 180r/min for 90min to obtain semi-finished product of green tea polyphenol soymilk powder. Sterilizing the semi-finished product of green tea polyphenol soymilk powder, and keeping the temperature at 130 ℃ for 30 min.

Example 5 preparation method of Green tea polyphenols soymilk powder

On the basis of the embodiment 1, the preparation method of the green tea powder in the green tea polyphenol soymilk powder comprises the following steps:

s1, screening raw materials: picking the young leaves of the Baisha green tea, placing the young leaves in a room, spreading and drying in the air, wherein the thickness of the spread leaves is 2cm, and the spreading and drying time is 5 h.

S2, steam fixation: and (3) deactivating enzyme of the spread and dried tea leaves by steam at the steam speed of 220r/min, the dehydration speed of 1000r/min and the deactivation temperature of 120 ℃.

S3, rolling: spreading the enzyme-removed tea leaves for cooling at 35-40 deg.C for 25min, and twisting.

S4, drying: drying the rolled tea leaves by microwave at the transmission speed of 350r/min and the microwave power of 7 multiplied by 850W for 40 min.

S5, superfine grinding: placing the dried tea into an ultralow temperature refrigeration device, freezing to-25 ℃, and grinding the tea into 300-mesh green tea powder by using an ultrafine grinder.

Example 6 preparation method of Green tea polyphenols soymilk powder

On the basis of the embodiment 1, the preparation method of the green tea powder in the green tea polyphenol soymilk powder comprises the following steps:

s1, screening raw materials: picking the crude old fresh leaves of the Baisha green tea, placing the leaves indoors, spreading and drying in the air in the shade for 5 hours, wherein the thickness of the spread leaves is 2 cm.

S2, steam fixation: and (3) deactivating enzyme of the spread and dried tea leaves by steam at the steam speed of 220r/min, the dehydration speed of 1000r/min and the deactivation temperature of 120 ℃.

S3, rolling: and spreading and cooling the de-enzymed tea leaves, and rolling for 40min at the spreading and cooling temperature of 25 ℃.

S4, drying: drying the rolled tea leaves by microwave at the transmission speed of 350r/min and the microwave power of 7 multiplied by 850W for 40 min.

S5, superfine grinding: placing the dried tea into an ultralow temperature refrigeration device, freezing to-25 ℃, and grinding the tea into 300-mesh green tea powder by using an ultrafine grinder.

Example 7 preparation method of Green tea polyphenols soymilk powder

On the basis of the embodiment 1, the preparation method of the green tea powder in the green tea polyphenol soymilk powder comprises the following steps:

s1, screening raw materials: picking the crude old fresh leaves of the Baisha green tea, placing the leaves indoors, spreading and drying in the air in the shade for 5 hours, wherein the thickness of the spread leaves is 2 cm.

S2, steam fixation: and (3) deactivating enzyme of the spread and dried tea leaves by steam at the steam speed of 230r/min, the dehydration speed of 1000r/min and the deactivation temperature of 140 ℃.

S3, rolling: and spreading and cooling the de-enzymed tea leaves, and rolling for 40min at the spreading and cooling temperature of 25 ℃.

S4, drying: drying the rolled tea leaves by microwave at the transmission speed of 350r/min and the microwave power of 7 multiplied by 850W for 40 min.

S5, superfine grinding: placing the dried tea into an ultralow temperature refrigeration device, freezing to-25 ℃, and grinding the tea into 300-mesh green tea powder by using an ultrafine grinder.

Comparative example 1

On the basis of the embodiment 1, the raw material ratio is adjusted, and specifically: 40 parts of soybean milk powder, 5 parts of green tea powder, 0.08 part of tea polyphenol, 33 parts of whole milk powder, 10 parts of white granulated sugar, 5 parts of coconut milk powder, 5 parts of cashew apple powder, 1 part of sodium carboxymethylcellulose and 1.5 parts of salt.

Comparative example 2

On the basis of the example 1, the raw material components are adjusted, specifically: the green tea polyphenol soymilk powder is prepared from 38 parts of soymilk powder, 20 parts of green tea powder, 0.05 part of tea polyphenol, 10 parts of whole milk powder, 10 parts of white granulated sugar, 15 parts of coconut milk powder, 0.5 part of sodium carboxymethylcellulose and 1 part of salt by weight.

Comparative example 3

On the basis of the embodiment 1, the preparation method of the green tea polyphenol soymilk powder is adjusted, and specifically comprises the following steps: mixing the above raw materials in a three-dimensional mixer at a rotation speed of 100r/min for 50min to obtain semi-finished product of green tea polyphenol soymilk powder. Sterilizing the semi-finished product of green tea polyphenol soymilk powder, and keeping the temperature at 170 ℃ for 30 min.

The soymilk powders of examples 1 to 7 and comparative examples 1 to 3 were prepared by the following methods:

(1) soybean milk: soaking high-quality soybean in hot water with the water temperature of 50 ℃ for 8h, peeling with hands, and grinding into soybean milk with a grinder, wherein the mass ratio of soybean to water is 1: 5.

(2) Boiling the soybean milk: boiling the soybean milk, skimming froth, and homogenizing the boiled soybean milk under three different pressures of 15MPa, 30MPa and 60MPa for 30min each time to obtain the cooked soybean milk.

(3) And (3) drying: and (3) drying the boiled soybean milk by using a spray drying method, spraying the dried soybean milk into a drying chamber under the pressure of about 5MPa, and carrying out spray drying at the air inlet temperature of 120 ℃ and the air exhaust temperature of 90 ℃ to obtain the soybean milk powder.

The green tea polyphenol production methods of examples 1 to 7 and comparative examples 1 to 3 were:

adding distilled water into green tea powder according to the material liquid mass ratio of 1:20, carrying out ultrasonic extraction for 1h with the ultrasonic power of 200W to obtain an extract, carrying out reduced pressure concentration to obtain a concentrated solution, carrying out reduced pressure concentration at 35 ℃ to 1/4 of the original volume, and carrying out low-temperature freeze drying on the concentrated solution to obtain green tea polyphenol, wherein the low-temperature freeze drying temperature is-5 ℃, and the freezing time is 2 h.

Test example 1 sensory evaluation

The green tea polyphenol soymilk powder prepared in examples 1-7 and comparative examples 1-3 are respectively packaged into 20 g/bag, and the air cleanliness of the packaging room is up to 10 ten thousand. Each bag was brewed with 200ml of boiled water (water temperature 80 ℃ C.), 200 persons were organized, 20 persons were organized, and 10 groups of the green tea polyphenol soymilk powder prepared in examples 1 to 7 and comparative examples 1 to 3 were tasted, respectively, and evaluated by scoring the taste, smell, texture and color.

Sensory evaluation results

Name (R)	Smell(s)	Color	Tissue morphology	Taste of the product	Total score
						Example 1	30	20	20	30	100
Example 2	30	20	20	30	100
						Example 3	30	20	20	30	100
Example 4	30	20	20	30	100
						Example 5	28	17	20	27	92
Example 6	28	19	20	28	95
						Example 7	27	19	20	27	93
Comparative example 1	27	18	20	25	90
						Comparative example 2	28	19	20	26	93
Comparative example 3	23	19	18	26	86

Experimental results show that the taste, smell, color and tissue form of the prepared food prepared by adopting the preferable raw materials and the preferable mixture ratio in the invention in the examples 1-4 have higher scores and are well popular with people. Example 5 adopts green tea tender shoots to make, the taste and the smell are reduced, and examples 6 and 7 adjust the preparation process of green tea powder, so that the taste and the smell of the soymilk powder are reduced. According to the invention, the cashew apple powder and the green tea powder are added as main auxiliary materials, so that the taste of the soybean milk powder is improved, and the nutritional ingredients of the soybean milk powder are enriched. And in the invention, because the cashew apple powder, the green tea powder and the soymilk powder are used for the first time to prepare the green tea polyphenol soymilk powder, the properties of various components need to be considered, the components can be uniformly mixed in the mixing process, and the quality of the finished product is ensured. The sterilization process of the invention not only can effectively sterilize, but also can remove beany flavor, so that the finished product has harmonious fragrance.

Test example 2

The soybean milk powders prepared in examples 1 to 7 and comparative examples 1 to 3 were examined for solubility, ash content and urease activity with reference to GB/T18738-2006.

Name (R)	Solubility (%)	Ash (%)	Urease activity
				Example 1	94.6	2.5	Negative of
Example 2	95.1	2.5	Negative of
				Example 3	95.3	2.5	Negative of
Example 4	96.1	2.5	Negative of
				Example 5	94.9	2.6	Negative of
Example 6	95.1	2.6	Negative of
				Example 7	94.8	2.5	Negative of
Comparative example 1	93.1	2.4	Negative of
				Comparative example 2	93.9	2.6	Negative of
Comparative example 3	90.3	2.7	Negative of

Experimental results show that the green tea polyphenol soymilk powder prepared by the invention has stable property and good solubility. Comparative example 3 the solubility was decreased by changing the sterilization method, and the sterilization method used in the present invention can completely sterilize while increasing the solubility of green tea polyphenol soymilk powder.

Test example 3

Analyzing 8 kinds of components such as catechin (C), Epicatechin (EC), Gallocatechin (GC), Epigallocatechin (EGC), epicatechin gallate (ECG), gallocatechin gallate (GCG), epigallocatechin gallate (EGCG) and Chlorogenic Acid (CA) in the prepared green tea polyphenol by capillary electrophoresis.

Referring to fig. 1, HPCE graph shows that the green tea polyphenol prepared by the present invention contains 8 components of catechin (C), Epicatechin (EC), Gallocatechin (GC), Epigallocatechin (EGC), epicatechin gallate (ECG), gallocatechin gallate (GCG), epigallocatechin gallate (EGCG) and Chlorogenic Acid (CA).

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.