A method for processing grape leaf and fruit tea

Abstract

This invention provides a processing method for grape leaf fruit tea, specifically including the following steps: Step 1, preparing grape tea leaves; Step 2, preparing grape juice; Step 3, preparing traditional Chinese medicine extract; Step 4, preparing grape leaf fruit tea by thoroughly mixing and heating the grape juice and traditional Chinese medicine extract, then adding the grape tea leaves, continuing heating, filtering out the residue, and cooling the filtrate to room temperature to obtain grape leaf fruit tea. This invention uses grapes and grape leaves as raw materials for fruit tea, adding traditional Chinese medicine extract for preparation, to develop a green and healthy compound fruit tea beverage. By using grape leaves, grapes, traditional Chinese medicine, and other materials, this invention, through the combination of fruit and traditional Chinese medicine, enables the fruit tea to have effects such as enhancing antibodies, promoting metabolism, aiding digestion, relieving hangovers, and anti-oxidation, and also solves the problem that grape leaves are not suitable for excessive consumption by people with weak spleen and stomach.

Description

Technical Field

[0001] This invention relates to the field of fruit tea preparation technology, specifically to a processing method for grape leaf fruit tea. Background Technology

[0002] Tea is one of the world's three major beverages. It not only has a very long history and rich cultural heritage, but also has significant medicinal and nutritional value. Tea contains a wealth of nutrients and medicinal components, making it one of the most commonly consumed "health drinks" in people's daily lives.

[0003] Grapes have the effects of replenishing qi and blood, relaxing muscles and tendons, and promoting urination. They are mainly used to treat qi and blood deficiency, lung deficiency cough, palpitations, night sweats, thirst, rheumatic pain, gonorrhea, edema, and incomplete eruption of smallpox. They also possess strong anti-cancer properties, the effects of which are recorded in both the *Shennong Bencao Jing* and *Bielu*. Grapes are considered a precious fruit, hailed as one of the world's four major fruits. They are not only rich in nutrients, versatile, beautiful in color, fragrant, and delicious, but also a top-quality fruit that can be eaten fresh or used to make wine. Furthermore, grape leaves are a common traditional Chinese medicine, sweet and sour in taste, neutral in nature, and entering the heart, liver, and lung meridians. They have the effects of assisting in lowering blood lipids, anti-aging, and preventing cardiovascular and cerebrovascular diseases. Grape leaves are rich in amino acids, vitamins, minerals, and other nutrients; moderate consumption can supplement the body's nutritional needs and enhance immunity. Grape leaves contain a large amount of vitamin C; moderate consumption can supplement the body's nutritional needs, promote metabolism, and benefit health.

[0004] However, in grape production, the amount of by-products such as grape leaves, tendrils, and stems pruned during a single growing cycle is approximately 1–7.5 t / hm². 2 These byproducts are often discarded, burned, or composted, which wastes resources and pollutes the environment. Therefore, exploring the value of these wastes in accordance with local conditions, recycling and reusing them, and developing high-value utilization technologies for these byproducts are of great significance for the sustainable development of the grape industry and the improvement of the environment.

[0005] Therefore, providing a method for preparing grape leaf fruit tea is considered an urgent problem to be solved. Summary of the Invention

[0006] To address the above problems, this invention provides a method for processing grape leaf and fruit tea, specifically including the following steps:

[0007] Step 1: Prepare grape tea leaves;

[0008] Select large, juicy, sweet and sour, brightly colored, wide-leaved, thick-fleshed grapes with no external damage, and then rinse the surface of the grapes with leaves with clean water to separate the grapes from the grape leaves.

[0009] Grape leaves are soaked in a potassium permanganate solution with continuous stirring. After soaking, the leaves are rinsed with clean water to remove the potassium permanganate solution and then dried. The leaves are then kneaded in a kneading machine until the skin of the grape leaves is finely cracked and the juice seeps out. The leaves are then steamed to kill the green. After killing the green, the leaves are dried in a drying machine until they reach a constant weight to obtain grape tea leaves.

[0010] Preferably, the mass fraction of potassium permanganate solution is 1.5-3%, soaking time is 5-10 min; blanching temperature is 150-200℃, blanching time is 20-30 min, and drying temperature is 75-90℃.

[0011] Step two, prepare grape juice;

[0012] Wash the grapes thoroughly: Put the grapes into the sweet and sour solution and heat them together, stirring constantly during heating. Then take the grapes out and let them dry.

[0013] After washing, the grapes are pulped, and rock sugar and citric acid are added during the pulping process. After pulping, water is added, and the solid-liquid ratio is 20:1 (ml / g). The mixture is stirred at 30-40℃ for 30-45 minutes, filtered, and the filtrate is grape juice.

[0014] Preferably, the sweet and sour liquid comprises water, brown sugar, glacial acetic acid and ethanol in a ratio of 100:1:1:10 (ml:g:g:ml); more preferably, the volume fraction of the ethanol is 75-95%.

[0015] Preferably, the heating temperature is 60-75℃; the heating time is 10-20 min; and the mass ratio of grapes, rock sugar and citric acid is (80-100):17:1.

[0016] Step 3: Preparation of Traditional Chinese Medicine Extracts

[0017] Goji berries, dried tangerine peel, astragalus, and cassia seeds were selected, dried in a dryer to constant weight, then pulverized in a grinder, placed in a container, and boiled with water and ethanol. The solid-liquid ratio was 20:1 (ml / g). The residue and filtrate were filtered to obtain the Chinese herbal extract.

[0018] Preferably, the mass ratio of wolfberry, dried tangerine peel, astragalus and cassia seed is 1:2:2:1; the drying temperature is 80-90℃; the steaming temperature is 90-100℃ and the steaming time is 45-60min.

[0019] Preferably, the volume ratio of water to ethanol is 100:15, and the volume fraction of ethanol is 75-95%.

[0020] Step 4: Prepare grape leaf and fruit tea

[0021] Mix grape juice and Chinese herbal extract thoroughly, heat to 80-85℃, then add grape tea leaves, continue heating to 95-100℃, stop heating after 20-30 minutes, filter out the residue, and cool the filtrate to room temperature to obtain grape leaf and fruit tea.

[0022] Preferably, the mass ratio of the grape juice, the traditional Chinese medicine extract, and the tea is 100:1:5.

[0023] The present invention has the following advantages:

[0024] (1) The present invention first prepares fruit juice and Chinese medicine extract, and then mixes them with grape tea leaves. Through high-temperature steaming, the nutrients in grape tea leaves are extracted and fully integrated with the fruit juice and Chinese medicine ingredients. This ensures the original taste of the raw materials while preserving their nutritional value, making the tea more distinctive in color, aroma and taste.

[0025] (2) This invention uses grape leaves as raw material for fruit tea, which not only turns waste into treasure, but also makes full use of the health benefits of grape leaves, achieving multiple benefits in one fell swoop.

[0026] (3) This invention reduces cost limitations by selecting materials and improves the quality of fruit tea by performing multiple cleaning and disinfection steps on the materials. Furthermore, the production process does not require a fast production speed, making the preparation process of this healthy fruit tea more refined. The combination of these two aspects greatly improves the quality of the fruit tea.

[0027] (4) Grape leaves are cold in nature. People with weak spleen and stomach should not consume too much of them to avoid causing abdominal pain, diarrhea and other discomfort. Therefore, this invention adds warm Chinese medicines such as tangerine peel and astragalus to avoid the fruit tea being too cold. It also adds neutral wolfberry to improve the health benefits of the fruit tea. A small amount of cassia seed is added to prevent the fruit tea from being too heat-clearing, so that the fruit tea also has a certain heat-clearing effect.

[0028] (5) This invention uses grape leaves, grapes, Chinese medicine and other materials to make the fruit tea have the effects of enhancing antibodies, promoting metabolism, aiding digestion, relieving hangovers and anti-oxidation. It also solves the problem that grape leaves are not suitable for people with weak spleen and stomach to consume in excess. Detailed Implementation

[0029] The technical solutions in the embodiments of the invention are described clearly and completely below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] The following examples and comparative examples all use purple grape varieties;

[0031] Example 1

[0032] Step 1: Prepare grape tea leaves;

[0033] Select large, juicy, sweet and sour, brightly colored, wide-leaved, thick-fleshed grapes with no external damage, and then rinse the surface of the grapes with leaves with clean water to separate the grapes from the grape leaves.

[0034] Grape leaves are soaked in a 3% potassium permanganate solution for 5 minutes with continuous stirring. After soaking, the leaves are rinsed with clean water to remove the potassium permanganate solution and then dried. The leaves are then kneaded in a kneading machine until the skin of the grape leaves is finely cracked and the juice seeps out. The leaves are then steamed at 200°C for 20 minutes to kill the green. After killing the green, the leaves are dried in a dryer at 80°C until constant weight is achieved to obtain grape tea leaves.

[0035] Step two, prepare grape juice;

[0036] The grapes are thoroughly washed: The grapes are placed in a sweet and sour solution and heated at 70°C for 15 minutes, stirring continuously during heating. The grapes are then removed and dried. The sweet and sour solution consists of water, brown sugar, glacial acetic acid, and ethanol in a ratio of 100:1:1:10 (ml:g:g:ml). The volume fraction of ethanol is 95%.

[0037] After washing, the grapes are pulped. During the pulping process, rock sugar and citric acid are added. The mass ratio of grapes, rock sugar and citric acid is 90:17:1. After pulping, water is added, and the solid-liquid ratio is 20:1 (ml / g). The mixture is stirred at 40℃ for 45 minutes, filtered, and the filtrate is grape juice.

[0038] Step 3: Preparation of Traditional Chinese Medicine Extracts

[0039] Goji berries, dried tangerine peel, astragalus, and cassia seeds were selected in a mass ratio of 1:2:2:1 and dried in a dryer at 85°C until constant weight. Then, they were pulverized in a pulverizer and placed in a container. Water and ethanol were added and the mixture was boiled at 95°C for 45 minutes. The solid-liquid ratio was 20:1 (ml / g), and the volume ratio of water to ethanol was 100:15, with the volume fraction of ethanol being 75-95%. The residue and filtrate were then filtered to obtain the herbal extract.

[0040] Step 4: Prepare grape leaf and fruit tea

[0041] Grape juice and traditional Chinese medicine extract are thoroughly mixed and heated to 85°C. Then grape tea leaves are added and the mixture is heated to 100°C. After 20 minutes, heating is stopped, the residue is filtered out, and the filtrate is cooled to room temperature to obtain grape leaf and fruit tea. The mass ratio of grape juice, traditional Chinese medicine extract, and tea leaves is 100:1:5.

[0042] Comparative Example 1

[0043] Unlike Example 1, this comparative example does not prepare grape juice;

[0044] Comparative Example 2

[0045] Unlike Example 1, this comparative example does not prepare herbal extracts;

[0046] Comparative Example 3

[0047] Unlike Example 1, this comparative example does not prepare grape tea leaves;

[0048] Comparative Example 4

[0049] Unlike Example 1, in step four of this comparative example, grape tea leaves were first soaked in 100°C water for 20 minutes, then the tea leaves were filtered out, and the tea water was thoroughly mixed with grape juice and Chinese herbal extract in a mass ratio of 100:1:5.

[0050] Test case

[0051] The contents of tea polyphenols, amino acids, vitamin C, and aroma components in the grape leaf and fruit tea prepared in the above examples and comparative examples were determined, and the results are shown in Table 1.

[0052]

[0053]

[0054] As can be seen from the table above, the grape leaf and fruit tea prepared in the embodiments of the present invention has a tea polyphenol content of 545.75 mg / kg, and contains a large amount of amino acids and vitamin C. It also has a bright color, a fresh and odorless taste, and a slightly bitter taste that gradually turns sweet. Comparative Example 1 lacks grape juice, so the content of amino acids and vitamin C is significantly reduced. Comparative Example 2 lacks Chinese herbal extracts, so the tea has no fresh aroma, and the content of tea polyphenols, amino acids, and vitamin C is slightly reduced. Comparative Example 3 lacks grape leaves, so the content of tea polyphenols is severely reduced, and there is no obvious tea aroma. Comparative Example 4 has slightly reduced content of tea polyphenols, amino acids, and vitamin C due to different processing methods.

[0055] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for processing grape leaf and fruit tea, characterized in that, Includes the following steps: Step 1: Prepare grape tea leaves; Select large, juicy, sweet and sour, brightly colored, wide-leaved, thick-fleshed grapes with no external damage, and then rinse the surface of the grapes with leaves with clean water to separate the grapes from the grape leaves. Grape leaves are soaked in a potassium permanganate solution with continuous stirring. After soaking, the leaves are rinsed with clean water to remove the potassium permanganate solution and then dried. The leaves are then kneaded in a kneading machine until the skin of the grape leaves is finely cracked and the juice seeps out. The leaves are then steamed to kill the green. After killing the green, the leaves are dried in a drying machine until they reach a constant weight to obtain grape tea leaves. Step two, prepare grape juice; Wash the grapes thoroughly: Put the grapes into the sweet and sour solution and heat them together, stirring constantly during heating. Then take the grapes out and let them dry. After washing, the grapes are pulped, and rock sugar and citric acid are added during the pulping process. After pulping, water is added, and the liquid-to-solid ratio is 20mL:1g. The mixture is stirred at 30-40℃ for 30-45 minutes, filtered, and the filtrate is grape juice. Step 3: Preparation of Traditional Chinese Medicine Extracts Goji berries, dried tangerine peel, astragalus, and cassia seeds were selected, dried in a dryer to constant weight, then pulverized in a grinder, placed in a container, and boiled with water and ethanol. The liquid-solid ratio was 20mL:1g. The residue and filtrate were filtered to obtain the Chinese herbal extract. Step 4: Prepare grape leaf and fruit tea Mix grape juice and Chinese herbal extract thoroughly, heat to 80-85℃, then add grape tea leaves, continue heating to 95-100℃, stop heating after 20-30 minutes, filter out the residue, and cool the filtrate to room temperature to obtain grape leaf and fruit tea. In step three, the mass ratio of wolfberry, dried tangerine peel, astragalus, and cassia seed is 1:2:2:1; the drying temperature is 80-90℃; the steaming temperature is 90-100℃, and the steaming time is 45-60 minutes. In step four, the mass ratio of grape juice, traditional Chinese medicine extract, and tea is 100:1:

5.

2. The method for processing grape leaf and fruit tea according to claim 1, characterized in that, In step one, the mass fraction of potassium permanganate solution is 1.5-3%, and the soaking time is 5-10 minutes; the blanching temperature is 150-200℃, the blanching time is 20-30 minutes, and the drying temperature is 75-90℃.

3. The method for processing grape leaf and fruit tea according to claim 1, characterized in that, In step two, the components of the sweet and sour liquid include water, brown sugar, glacial acetic acid and ethanol, in a ratio of 100mL:1g:1g:10mL.

4. The method for processing grape leaf and fruit tea according to claim 3, characterized in that, The volume fraction of the ethanol is 75-95%.

5. A method for processing grape leaf and fruit tea according to claim 1, characterized in that, In step two, the heating temperature is 60-75℃; the heating time is 10-20 minutes; and the mass ratio of grapes, rock sugar and citric acid is (80-100):17:

1.

6. The method for processing grape leaf and fruit tea according to claim 1, characterized in that, In step three, the volume ratio of water to ethanol is 100:15, and the volume fraction of ethanol is 75-95%.

7. Grape leaf and fruit tea prepared by the method according to any one of claims 1-6.

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