Method for making a tea of tiliacora Africana

Abstract

The application relates to the technical field of scented tea, and discloses a preparation method of linden flower tea, which comprises the following steps: (1) picking linden flowers; (2) trimming the linden flowers; (3) grade screening of the linden flowers; (4) drying; (5) bottling; and (6) sealing. The prepared linden flower tea does not introduce other components, so that other material components cannot impact the taste of the linden flower tea, the taste of the linden flower tea can be fully exhibited, and the taste of the linden flower tea is not inharmonious.

Description

Technical Field

[0001] This invention relates to the field of flower tea technology, specifically a method for making linden flower tea. Background Technology

[0002] The linden tree has grayish-white bark, stellate hairs on young branches, ovate terminal buds, and alternate, simple leaves that are ovate with a cordate base. The linden tree flowers are slightly oblique. The upper surface is hairless, while the lower surface is covered with gray or grayish-yellow stellate hairs with regular serrations. The inflorescence stalk is covered with gray hairs, which are initially denser, with a blunt apex and a narrow base. The fruit is spherical. The flowering period is in July, and the fruiting period is in September.

[0003] Tilia trees are distributed in Shandong, Jiangsu, Anhui, Zhejiang, Jiangxi, Guangdong and other places; they grow in shady and damp places such as hillsides and gullies.

[0004] Linden flowers can be used in medicine. They are pungent and slightly warm in nature, and enter the lung meridian. They have the effects of inducing sweating to relieve exterior syndromes, relieving pain and reducing acne. They are used to treat colds caused by wind and cold, headaches and body aches.

[0005] Linden flowers are categorized into large-leaf and small-leaf varieties based on the linden tree species. Large-leaf linden flowers, produced by the large-leaf variety (such as the Camellia sinensis), and small-leaf linden flowers, produced by the small-leaf variety, are called linden flower tea. Tea made from linden flowers is known as linden flower tea.

[0006] With social development and the improvement of people's living standards, people are increasingly pursuing the quality of food. China has a long history of making, drinking, and appreciating tea. Traditional tea is processed through steps such as fixing (killing the green), but modern linden flower tea production techniques are not yet mature, resulting in significant nutrient loss and damage to the morphology of the linden flowers.

[0007] Based on this, we propose a method for making linden flower tea, hoping to address the shortcomings of existing technologies. Summary of the Invention

[0008] (a) Technical problems to be solved

[0009] To address the shortcomings of existing technologies, this invention provides a method for making linden flower tea.

[0010] (II) Technical Solution

[0011] To achieve the above objectives, the present invention provides the following technical solution:

[0012] A method for making linden flower tea includes the following steps:

[0013] (1) Picking linden flowers: Pick linden flowers that are fully open;

[0014] (2) Pruning linden flowers: Prune the linden flowers with multiple inflorescences;

[0015] (3) Linden flower grading: Linden flowers are screened using a mesh sieve and graded according to size, while unopened buds are removed.

[0016] (4) Drying: First, the linden flowers are washed, then vacuum sprayed, and then dried using hot air drying. After drying, dried linden flower tea is obtained.

[0017] (5) Bottling: Weigh the dried linden flower tea and bottle it;

[0018] (6) Sealing: Seal the linden flower tea after bottling.

[0019] As a further technical solution, the fully bloomed linden flowers mentioned in step (1) need to be selected from those with intact petals, free from pests and decay.

[0020] As a further technical solution, the pruning of the multi-inflorescence linden flowers in step (2) is as follows: the multi-inflorescence linden flowers are cut apart one by one to obtain each independent linden flower.

[0021] As a further technical solution: in step (3), the linden flowers are screened into three grades using a mesh sieve: linden flowers larger than 6cm, linden flowers between 4-6cm, and linden flowers smaller than 4cm.

[0022] Linden flowers smaller than 4cm do not include unopened buds.

[0023] As a further technical solution, the vacuum spraying treatment in step (4) is as follows:

[0024] First, prepare the spray solution;

[0025] Evenly spray the prepared spray solution onto the surface of the linden flowers. Let it stand at room temperature for 1 hour, then spray the spray solution again. Place the sprayed linden flowers in a vacuum-sealed environment for 4-5 hours, then remove them.

[0026] As a further technical solution, the spray solution is made of the following components by weight: 2-3 parts ascorbic acid, 1-1.8 parts cellulase, 2-5 parts taurine, 5-8 parts chia seed extract, and 40-45 parts purified water.

[0027] As a further technical solution: the method for preparing the chia seed extract is as follows:

[0028] First, wash the chia seeds with water and then drain them;

[0029] Chia seeds that have been washed with water are crushed to obtain chia seed powder;

[0030] Chia seed powder and ethanol solution were mixed at a mass ratio of 1:10, stirred at 5000 r / min for 2 hours, allowed to stand for 1 hour, and then filtered to obtain the filtrate.

[0031] The filtrate was freeze-dried to obtain chia seed extract;

[0032] The corn silk water and chia seed extract were mixed evenly at a mass ratio of 5:1 to obtain the chia seed extract solution.

[0033] As a further technical solution: the method for preparing corn silk water is as follows:

[0034] Mix corn silk with hot water at 70℃ at a mass ratio of 1:10-14, keep warm in a water bath at 70℃ for 2 hours, and then filter to obtain corn silk water.

[0035] As a further technical solution, the hot air temperature of the hot air drying method in step (4) is 45°C;

[0036] The drying time for hot air drying is 12-14 hours.

[0037] (III) Beneficial Effects

[0038] Compared with the prior art, the present invention provides a method for making linden flower tea, which has the following beneficial effects:

[0039] The linden flower tea prepared by this invention does not contain any other ingredients. Therefore, no other material components will impact the taste of the linden flower tea or cause any disharmonious taste, thus fully showcasing the flavor of the linden flower tea.

[0040] This invention, through extensive experimentation with various drying methods, ultimately selected hot air drying at 45℃, which yields linden flower tea with intact structure and a superior taste. Other drying methods often result in incomplete and unattractive flower shapes, accompanied by a bitter taste. The method of this invention further expands the economic value of linden flower tea, promising a promising market prospect.

[0041] This invention employs a vacuum spraying process before drying. The spraying liquid adheres to the surface of the linden flowers, dissolving the cell walls and releasing active nutrients, thus enhancing the nutritional value of the linden flower tea. Furthermore, the various active ingredients in the spraying liquid penetrate the inner tissues of the linden flowers, stimulating the activity of oxidases and causing phenols to oxidize, forming numerous intermediate oxidation products. This reduces the bitterness of the linden flowers, improves the overall taste, and protects the nutrients within the flowers, minimizing nutrient loss during the drying process. Attached Figure Description

[0042] Figure 1 This is a flowchart illustrating the process of making linden flower tea. Detailed Implementation

[0043] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. 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 of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0044] The following are specific examples:

[0045] Example 1

[0046] A method for making linden flower tea includes the following steps:

[0047] (1) Picking linden flowers: Linden flowers that are fully open must be picked; fully open linden flowers must be selected with intact petals, free from pests and decay.

[0048] (2) Pruning linden flowers: Prune linden flowers with multiple inflorescences; Pruning linden flowers with multiple inflorescences is done by cutting each linden flower into its own individual parts.

[0049] (3) Linden flower grading: Linden flowers are screened using a mesh sieve and graded according to size, while unopened buds are removed; Linden flowers are screened into three grades using a mesh sieve: linden flowers larger than 6cm, linden flowers 4-6cm, and linden flowers smaller than 4cm.

[0050] Linden flowers smaller than 4cm do not include unopened buds.

[0051] (4) Drying: First, the linden flowers are washed, then vacuum sprayed, and after removal, they are dried using hot air drying. After drying, dried linden flower tea is obtained; the vacuum spraying process is as follows:

[0052] First, prepare the spray solution;

[0053] Evenly spray the prepared spray solution onto the surface of the linden flowers. Let it stand at room temperature for 1 hour, then spray the solution again. Place the sprayed linden flowers in a vacuum-sealed environment for 4 hours, then remove them. The spray solution, by weight, comprises the following components: 2 parts ascorbic acid, 1 part cellulase, 2 parts taurine, 5 parts chia seed extract, and 40 parts purified water. The preparation method of the chia seed extract is as follows:

[0054] First, wash the chia seeds with water and then drain them;

[0055] Chia seeds that have been washed with water are crushed to obtain chia seed powder;

[0056] Chia seed powder and ethanol solution were mixed at a mass ratio of 1:10, stirred at 5000 r / min for 2 hours, allowed to stand for 1 hour, and then filtered to obtain the filtrate.

[0057] The filtrate was freeze-dried to obtain chia seed extract;

[0058] The corn silk water and chia seed extract were mixed evenly at a mass ratio of 5:1 to obtain the chia seed extract; the corn silk water was prepared as follows:

[0059] Corn silk was mixed with hot water at 70℃ at a mass ratio of 1:10, and kept warm in a water bath at 70℃ for 2 hours. Then it was filtered to obtain corn silk water. The hot air temperature for the hot air drying method was 45℃.

[0060] The drying time for hot air drying is 12 hours.

[0061] (5) Bottling: Weigh the dried linden flower tea and bottle it;

[0062] (6) Sealing: Seal the linden flower tea after bottling.

[0063] Example 2

[0064] A method for making linden flower tea includes the following steps:

[0065] (1) Picking linden flowers: Linden flowers that are fully open must be picked; fully open linden flowers must be selected with intact petals, free from pests and decay.

[0066] (2) Pruning linden flowers: Prune linden flowers with multiple inflorescences; Pruning linden flowers with multiple inflorescences is done by cutting each linden flower into its own individual parts.

[0067] (3) Linden flower grading: Linden flowers are screened using a mesh sieve and graded according to size, while unopened buds are removed; Linden flowers are screened into three grades using a mesh sieve: linden flowers larger than 6cm, linden flowers 4-6cm, and linden flowers smaller than 4cm.

[0068] Linden flowers smaller than 4cm do not include unopened buds.

[0069] (4) Drying: First, the linden flowers are washed, then vacuum sprayed, and after removal, they are dried using hot air drying. After drying, dried linden flower tea is obtained; the vacuum spraying process is as follows:

[0070] First, prepare the spray solution;

[0071] Evenly spray the prepared spray solution onto the surface of the linden flowers. Let it stand at room temperature for 1 hour, then spray the solution again. Place the sprayed linden flowers in a vacuum-sealed environment for 4.5 hours, then remove them. The spray solution, by weight, comprises the following components: ascorbic acid 2.3 parts, cellulase 1.2 parts, taurine 3 parts, chia seed extract 6 parts, and purified water 42 parts. The preparation method of the chia seed extract is as follows:

[0072] First, wash the chia seeds with water and then drain them;

[0073] Chia seeds that have been washed with water are crushed to obtain chia seed powder;

[0074] Chia seed powder and ethanol solution were mixed at a mass ratio of 1:10, stirred at 5000 r / min for 2 hours, allowed to stand for 1 hour, and then filtered to obtain the filtrate.

[0075] The filtrate was freeze-dried to obtain chia seed extract;

[0076] The corn silk water and chia seed extract were mixed evenly at a mass ratio of 5:1 to obtain the chia seed extract; the corn silk water was prepared as follows:

[0077] Corn silk was mixed with hot water at 70℃ in a mass ratio of 1:11, and kept warm in a water bath at 70℃ for 2 hours. Then it was filtered to obtain corn silk water. The hot air temperature for the hot air drying method was 45℃.

[0078] The drying time for hot air drying is 13 hours.

[0079] (5) Bottling: Weigh the dried linden flower tea and bottle it;

[0080] (6) Sealing: Seal the linden flower tea after bottling.

[0081] Example 3

[0082] A method for making linden flower tea includes the following steps:

[0083] (1) Picking linden flowers: Linden flowers that are fully open must be picked; fully open linden flowers must be selected with intact petals, free from pests and decay.

[0084] (2) Pruning linden flowers: Prune linden flowers with multiple inflorescences; Pruning linden flowers with multiple inflorescences is done by cutting each linden flower into its own individual parts.

[0085] (3) Linden flower grading: Linden flowers are screened using a mesh sieve and graded according to size, while unopened buds are removed; Linden flowers are screened into three grades using a mesh sieve: linden flowers larger than 6cm, linden flowers 4-6cm, and linden flowers smaller than 4cm.

[0086] Linden flowers smaller than 4cm do not include unopened buds.

[0087] (4) Drying: First, the linden flowers are washed, then vacuum sprayed, and after removal, they are dried using hot air drying. After drying, dried linden flower tea is obtained; the vacuum spraying process is as follows:

[0088] First, prepare the spray solution;

[0089] Evenly spray the prepared spray solution onto the surface of the linden flowers. Let it stand at room temperature for 1 hour, then spray the solution again. Place the sprayed linden flowers in a vacuum-sealed environment for 4 hours, then remove them. The spray solution, by weight, comprises the following components: ascorbic acid 3 parts, cellulase 1.6 parts, taurine 4 parts, chia seed extract 6 parts, and purified water 44 parts. The preparation method of the chia seed extract is as follows:

[0090] First, wash the chia seeds with water and then drain them;

[0091] Chia seeds that have been washed with water are crushed to obtain chia seed powder;

[0092] Chia seed powder and ethanol solution were mixed at a mass ratio of 1:10, stirred at 5000 r / min for 2 hours, allowed to stand for 1 hour, and then filtered to obtain the filtrate.

[0093] The filtrate was freeze-dried to obtain chia seed extract;

[0094] The corn silk water and chia seed extract were mixed evenly at a mass ratio of 5:1 to obtain the chia seed extract; the corn silk water was prepared as follows:

[0095] Corn silk was mixed with hot water at 70℃ in a mass ratio of 1:12, and kept warm in a water bath at 70℃ for 2 hours. Then it was filtered to obtain corn silk water. The hot air temperature for the hot air drying method was 45℃.

[0096] The drying time for hot air drying is 12 hours.

[0097] (5) Bottling: Weigh the dried linden flower tea and bottle it;

[0098] (6) Sealing: Seal the linden flower tea after bottling.

[0099] Example 4

[0100] A method for making linden flower tea includes the following steps:

[0101] (1) Picking linden flowers: Linden flowers that are fully open must be picked; fully open linden flowers must be selected with intact petals, free from pests and decay.

[0102] (2) Pruning linden flowers: Prune linden flowers with multiple inflorescences; Pruning linden flowers with multiple inflorescences is done by cutting each linden flower into its own individual parts.

[0103] (3) Linden flower grading: Linden flowers are screened using a mesh sieve and graded according to size, while unopened buds are removed; Linden flowers are screened into three grades using a mesh sieve: linden flowers larger than 6cm, linden flowers 4-6cm, and linden flowers smaller than 4cm.

[0104] Linden flowers smaller than 4cm do not include unopened buds.

[0105] (4) Drying: First, the linden flowers are washed, then vacuum sprayed, and after removal, they are dried using hot air drying. After drying, dried linden flower tea is obtained; the vacuum spraying process is as follows:

[0106] First, prepare the spray solution;

[0107] Evenly spray the prepared spray solution onto the surface of the linden flowers. Let it stand at room temperature for 1 hour, then spray the solution again. Place the sprayed linden flowers in a vacuum-sealed environment for 5 hours, then remove them. The spray solution, by weight, comprises the following components: 3 parts ascorbic acid, 1.8 parts cellulase, 5 parts taurine, 8 parts chia seed extract, and 45 parts purified water. The preparation method of the chia seed extract is as follows:

[0108] First, wash the chia seeds with water and then drain them;

[0109] Chia seeds that have been washed with water are crushed to obtain chia seed powder;

[0110] Chia seed powder and ethanol solution were mixed at a mass ratio of 1:10, stirred at 5000 r / min for 2 hours, allowed to stand for 1 hour, and then filtered to obtain the filtrate.

[0111] The filtrate was freeze-dried to obtain chia seed extract;

[0112] The corn silk water and chia seed extract were mixed evenly at a mass ratio of 5:1 to obtain the chia seed extract; the corn silk water was prepared as follows:

[0113] Corn silk was mixed with hot water at 70℃ at a mass ratio of 1:14, and kept in a water bath at 70℃ for 2 hours. Then it was filtered to obtain corn silk water. The hot air temperature for the hot air drying method was 45℃.

[0114] The drying time for hot air drying is 14 hours.

[0115] (5) Bottling: Weigh the dried linden flower tea and bottle it;

[0116] (6) Sealing: Seal the linden flower tea after bottling.

[0117] Comparative Example 1:

[0118] Based on Example 2, no nano-additives are added to the composite modified water-based binder, while the rest of the technical solutions remain unchanged.

[0119] test:

[0120] Sensory evaluation of the sample from the example was conducted: the sample was brewed with water at 100°C at a mass ratio of 1:10, left to stand for 10 minutes, and then compared.

[0121] Table 1

[0122]

[0123]

[0124] As can be seen from Table 1, the linden flower tea prepared by the method of the present invention has a good taste and is suitable for most people.

[0125] The nutrient content of the samples from the Example and Comparative Example 1 was determined and compared.

[0126] Table 2

[0127] polysaccharide % Total flavonoids % Total phenols % Example 1 15.30 1.02 3.24 Example 2 15.32 1.04 3.27 Example 3 15.29 1.00 3.26 Example 4 15.28 1.03 3.23 Comparative Example 1 15.01 0.86 4.05

[0128] As can be seen from Table 2, vacuum spraying treatment can improve the nutrient content of the finished linden flower tea.

[0129] Using Example 2 as the base sample, the effects of different hot air temperatures on the nutrient content of linden flower tea were compared.

[0130] Table 3

[0131]

[0132]

[0133] As can be seen from Table 3, different hot air drying stabilization methods have a significant impact on the nutrient content of linden flower tea.

[0134] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method for making linden flower tea, characterized in that, Includes the following steps: (1) Picking linden flowers: Pick linden flowers that are fully open; (2) Pruning linden flowers: Prune the linden flowers with multiple inflorescences; (3) Linden flower grading: Linden flowers are screened using a mesh sieve and graded according to size, while unopened buds are removed; (4) Drying: First, the linden flowers are washed, and then vacuum spraying is performed. After taking them out, the linden flowers are dried using hot air drying. After drying, dried linden flower tea is obtained. (5) Bottling: Weigh the dried linden flower tea and bottle it; (6) Sealing: Seal the linden flower tea after bottling; The vacuum spraying treatment described in step (4) is as follows: First, prepare the spray solution; Evenly spray the prepared spray solution onto the surface of the linden flowers. Let it stand at room temperature for 1 hour, then spray the spray solution again. Place the sprayed linden flowers in a vacuum-sealed environment for 4-5 hours, then remove them. The spray solution is made of the following components by weight: 2-3 parts ascorbic acid, 1-1.8 parts cellulase, 2-5 parts taurine, 5-8 parts chia seed extract, and 40-45 parts purified water. The method for preparing the chia seed extract is as follows: First, wash the chia seeds with water and then drain them; Chia seeds that have been washed with water are crushed to obtain chia seed powder; Chia seed powder and ethanol solution were mixed at a mass ratio of 1:10, stirred at 5000 r / min for 2 hours, allowed to stand for 1 hour, and then filtered to obtain the filtrate. The filtrate was freeze-dried to obtain chia seed extract; The corn silk water and chia seed extract were mixed evenly at a mass ratio of 5:1 to obtain the chia seed extract solution.

2. The method for preparing linden flower tea according to claim 1, characterized in that, In step (1), the fully bloomed linden flowers need to be selected with intact petals, free from pests and decay.

3. The method for preparing linden flower tea according to claim 1, characterized in that, In step (2), the pruning of the multi-inflorescence linden flowers is carried out by cutting the multi-inflorescence linden flowers one by one to obtain each linden flower as an independent flower.

4. The method for preparing linden flower tea according to claim 1, characterized in that: In step (3), the linden flowers are screened into three grades using a mesh sieve: linden flowers larger than 6cm, linden flowers between 4-6cm, and linden flowers smaller than 4cm. Linden flowers smaller than 4cm do not include unopened buds.

5. The method for preparing linden flower tea according to claim 1, characterized in that: The method for preparing the corn silk water is as follows: Mix corn silk with hot water at 70℃ at a mass ratio of 1:10-14, keep warm in a water bath at 70℃ for 2 hours, and then filter to obtain corn silk water.

6. The method for producing linden flower tea according to claim 1, characterized in that, The hot air temperature in step (4) of the hot air drying method is 45°C; The drying time for hot air drying is 12-14 hours.

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