CN113057991B

CN113057991B - Steamed dried orange peel and preparation method thereof

Info

Publication number: CN113057991B
Application number: CN202110383875.4A
Authority: CN
Inventors: 姚方程; 崔家泉; 张青; 陈华师; 易斌; 韩雅慧; 陈西勇
Original assignee: Jianchangbang Pharmacy Co ltd
Current assignee: Jianchangbang Pharmacy Co ltd
Priority date: 2021-04-09
Filing date: 2021-04-09
Publication date: 2022-05-20
Anticipated expiration: 2041-04-09
Also published as: CN113057991A

Abstract

The invention relates to the technical field of traditional Chinese medicines and provides steamed tangerine peel and a preparation method thereof. The preparation method comprises the following steps: s1, preprocessing: spraying the plant extract with the pH value of 4.5-6.5 on the dried orange peel raw medicinal material obtained in the step S1, and moistening the wet dried orange peel raw medicinal material for a certain time; s2, steaming: placing the pretreated pericarpium citri reticulatae original drug in a food steamer for steaming, and steaming for 5-40 min after the pericarpium citri reticulatae original drug is steamed to be up to the air; s3, cutting; and S4, drying. According to the invention, the dried orange peel is steamed, so that the color of the steamed dried orange peel is deepened, the dried orange peel is soft and moist, the pungent and warm properties are relieved, and the effects of moistening the lung and reducing phlegm are enhanced; by using the plant extract with the pH value of 4.5-6.5 to thoroughly moisten the original pericarpium citri reticulatae, the dissolution of active ingredients in the pericarpium citri reticulatae can be promoted, and the content of the active ingredients in the pericarpium citri reticulatae can be greatly improved by combining steaming, so that the effects of regulating qi and strengthening spleen, eliminating dampness and reducing phlegm of the pericarpium citri reticulatae are improved. The preparation method disclosed by the invention is simple to operate, high in efficiency and applicable to large-scale production.

Description

Steamed dried orange peel and preparation method thereof

Technical Field

The invention relates to the technical field of traditional Chinese medicines, in particular to steamed tangerine peel and a preparation method thereof.

Background

The pericarpium Citri Tangerinae is derived from dried mature pericarp of Citrus reticulata Blanco of Rutaceae and its cultivar. The medicinal materials are divided into pericarpium Citri Tangerinae and pericarpium Citri Tangerinae. It is warm in nature, bitter in taste and pungent in flavor, such as spleen and lung meridian. Has the functions of regulating qi, strengthening spleen, eliminating dampness and phlegm. Can be used for treating anorexia, vomiting, diarrhea, cough, excessive phlegm, etc. The main active ingredients in the dried orange peel are flavonoids and volatile oil, and in recent epidemic disease investigation reports, the flavonoids can reduce blood pressure and blood fat and prevent and improve cardiovascular and cerebrovascular diseases, and the volatile oil active ingredients can remove free radicals in vivo and play roles in resisting oxidation, aging and the like. The water extract or volatile oil can block or relieve tracheal smooth muscle contraction caused by acetylcholine chloride, and the volatile oil has protective effect on drug-induced asthma of guinea pig. The dried orange peel alcohol extract can completely resist spastic contraction of bronchial smooth muscle caused by histamine, is one of people with high asthma-relieving potency, and has remarkable cough-relieving effect.

The prior art discloses a processing method of traditional Chinese medicine dried orange peel, and provides a method of moistening and steaming to improve the pungency and dryness of the dried orange peel. But the method obviously reduces the content of volatile oil active ingredients in the dried orange peel, thereby affecting the efficacy of the dried orange peel; the prior art discloses a method for processing pericarpium citri reticulatae with high efficiency and quick fragrance, which adopts the methods of wine stewing, steaming and long-term storage to remove the pungent taste and improve the mellow fragrance of the pericarpium citri reticulatae. The method also removes a large amount of volatile active ingredients in pericarpium Citri Tangerinae, and has long shelf life and difficulty in controlling product quality. At present, the content of active ingredients of the dried orange peel manufactured on the market only reaches the standard specified in Chinese pharmacopoeia, and the efficacy of dried orange peel manufacturing is far from being fully exerted.

The quality control standard of dried orange peel in 'Chinese pharmacopoeia' of 2015 edition stipulates the content determination of hesperidin, and meanwhile, researches show that flavanones are one of the main categories of flavone contained in dried orange peel, including narirutin, hesperidin and the like. Hesperidin has a complex structure and is difficult to prepare in a full-synthesis manner. Generally, narirutin with a similar structure to the narirutin is extracted from plants and used as a starting raw material, and then the hesperidin is prepared by conversion through a chemical synthesis method, wherein the process conditions are harsh, and the post-treatment of the product is troublesome. The hesperidin biotransformation method can successfully transform the hesperidin into the neohesperidin under the combined action of glucosyltransferase and rhamnose-7-O-glucoside, and the requirements on process conditions are very strict. Therefore, the invention aims to find an enzyme existing in the plant as a catalyst, which is used for catalyzing the conversion of the dried orange peel to obtain the hesperidin and promoting the dissolution of the volatile oil from the viewpoint.

Disclosure of Invention

The invention aims to overcome at least one of the defects in the prior art and provides steamed dried orange peel which keeps the active ingredients of the dried orange peel and improves the taste of the dried orange peel and a preparation method thereof. The purpose of the invention is realized based on the following technical scheme:

the invention aims to provide a preparation method of steamed dried orange peel, which comprises the following steps:

s1, preprocessing: spraying the pretreatment solution on the original pericarpium citri reticulatae medicine, and moistening the wet original pericarpium citri reticulatae medicine for a certain time; the pretreatment solution is a plant extracting solution with the pH value of 4.5-6.5, and the plant extracting solution comprises 0-30 parts of hawthorn, 0-30 parts of fructus aurantii, 0-30 parts of radix ophiopogonis, 0-20 parts of liquorice, 0-20 parts of medlar and 0-20 parts of jasmine;

s2, steaming: placing the pretreated pericarpium citri reticulatae original drug in a food steamer for steaming, and steaming for 5-40 min after the pericarpium citri reticulatae original drug is steamed to be up to the air;

s3, cutting: taking out the steamed pericarpium Citri Tangerinae, cooling, and shredding;

s4, drying: drying the dried tangerine peel to obtain dried tangerine peel;

s5, storage: storing the dried pericarpium Citri Tangerinae under pressurized condition to obtain steamed pericarpium Citri Tangerinae.

Hawthorn fruit: stagnant blood blocking chest and abdominal pain, dysmenorrhea. It is warm in nature and enters liver meridian and blood system, and has the actions of promoting blood circulation, removing blood stasis and alleviating pain.

Fructus aurantii: regulate qi, relieve chest stuffiness, move stagnation and remove food retention.

Radix ophiopogonis: moisten lung and clear heart, purge heat and promote fluid production, resolve phlegm and stop vomiting, cure cough and promote diuresis. Has effects in relieving fatigue, scavenging free radicals, improving cellular immunity, and lowering blood sugar.

Licorice root: invigorating spleen and replenishing qi, clearing away heat and toxic material, eliminating phlegm and relieving cough, relieving spasm and pain, and harmonizing the drugs. Has antiinflammatory, antiviral, liver protecting, toxic materials clearing away, and immunity enhancing effects.

Medlar: has effects of nourishing liver and kidney, replenishing vital essence, and improving eyesight. Has effects in promoting immunity and regulating immunity; promoting hematopoietic function, etc.

Jasmine flower: pungent, slightly sweet and warm in nature; it enters spleen, stomach and liver meridians. Regulate qi to alleviate pain, avoid dirty and alleviate melancholy. It can be used for treating damp turbidity obstruction in middle energizer, chest and diaphragm discomfort, dysentery, abdominal pain, dizziness, headache, conjunctival congestion, and skin ulcer.

Some Chinese herbal medicine plants contain Chinese herbal medicine self-enzyme, and extract of the plants can be used as a plant catalyst to promote the transformation of effective components in other Chinese herbal medicine. In addition, research shows that the amino acid can be used for catalyzing the reaction of the radicel acetophenone-4' -beta-neohesperidin and isovanillin to synthesize the neohesperidin. Therefore, the invention utilizes the amino acid contained in the plant extract and the enzyme of the Chinese herbal medicine to be applied to the processing of the dried orange peel and used as a catalyst to promote the conversion and the dissolution of the active ingredients in the dried orange peel. After pretreatment, the dried orange peel absorbs water, so that the plant catalyst is distributed on the surface of the dried orange peel and partially permeates into the dried orange peel; the steaming plays a role in promoting the transformation of the hesperidin catalyzed by the plant catalyst, so that under the combined action of the steaming and the plant catalyst, the processing time of the dried orange peel is greatly reduced, and the effective ingredients in the dried orange peel are greatly improved. In addition, the plant extract contains flavonoid, polyphenol, polysaccharide, saponin and other components, and the components have the antioxidant effect and prolong the storage life of the dried orange peel. The pressurized preservation can promote the further dissolution of the effective components in the dried orange peel, is beneficial to the full play of the efficacy of the dried orange peel and improves the quality of the dried orange peel.

Preferably, the process for preparing the raw material of dried orange peel in step S1 may be natural drying, low-temperature air drying or microwave heating drying.

Preferably, the preparation method of the pretreatment solution in step S1 includes: frying the raw materials of the plant extract for 10-30 min, adding water with the mass being 3-12 times of that of the raw materials, decocting for 0.5-3 h, filtering to obtain a decoction, and adding vinegar to adjust the pH value.

Preferably, the temperature of the moistening in the step S1 is 25-50 ℃, and the time is 5-30 min.

Preferably, the amount of the pretreatment solution in step S1 is 0.5-10% of the original drug of dried orange peel.

Preferably, the pretreatment solution is sprayed on the dried orange peel technical by using an atomization distributor in step S1.

Preferably, the steaming in step S2 is steam steaming.

Preferably, in the step S2, the steaming is normal pressure steaming or high pressure steaming, and the pressure of the high pressure steaming is 100 to 120 kPa.

Preferably, the width of the cut thread in the step S3 is 2-10 mm.

Preferably, the drying in step S4 is drying at 40-70 ℃, or sun-drying.

Preferably, the air pressure for preservation in step S5 is 110-150kPa, the storage temperature is 35-40 ℃, and the sterilization treatment is carried out in the storage process.

In another aspect of the invention, there is provided a steamed citrus peel, prepared according to any of the above methods.

The invention can obtain at least one of the following beneficial effects:

1. according to the invention, the dried orange peel is steamed, so that the color of the steamed dried orange peel is deepened, the dried orange peel is soft and moist, the pungent and warm properties are alleviated, and the effects of moistening the lung and reducing phlegm are enhanced; the plant extract solution containing the Chinese herbal medicine enzyme is used for moistening the original orange peel, so that the dissolution of active ingredients in the orange peel can be promoted, the combination with steaming can greatly improve the content of the active ingredients in the orange peel, the efficacy of the orange peel can be fully exerted, and the efficacy of regulating qi and strengthening spleen, moistening lung and reducing phlegm of the orange peel can be improved.

2. The plant extract has antioxidant components, prolongs the storage life of the dried orange peel and improves the medicinal value of the dried orange peel to a certain extent.

3. The preparation method disclosed by the invention is simple to operate, high in efficiency and applicable to large-scale production.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The vinegar in the following examples is glutinous rice vinegar, and the content of acetic acid is 2-6 g/100 mL. The preparation process of the dried orange peel raw material can be natural airing and drying, low-temperature blast drying or microwave heating and drying.

Example 1

Preparing a plant extracting solution: parching the hawthorn for 10min, adding water with the mass being 12 times that of the hawthorn, decocting for 1.5h, filtering to obtain a decoction, and adding vinegar to adjust the pH value to 4.5-5.

A preparation method of steamed dried orange peel comprises the following steps:

s1, preprocessing: spraying a pretreatment solution with the mass of 15% of the original dried orange peel drug on the original dried orange peel drug by using an atomization distributor, and moistening the original dried orange peel drug for a certain time; wherein, the pretreatment liquid comprises: 10 parts of vinegar, 50 parts of yellow wine and 5 parts of plant extract; the moistening temperature is 50 deg.C, and the time is 8 min.

S2, steaming: placing the pretreated pericarpium Citri Tangerinae original drug in a steamer, steaming with water vapor under normal pressure, steaming to steam until it is aerated for 6 min;

s3, cutting: taking out steamed pericarpium Citri Tangerinae, cooling, and shredding to 2-10mm width;

s4, drying: drying in the sun to obtain dried pericarpium Citri Tangerinae;

s5, storage: and (3) placing the obtained dried tangerine peel in a 110kPa pressurized environment for storage at the temperature of 35 ℃, and performing sterilization treatment in the storage process to obtain steamed tangerine peel.

Example 2

Preparing a plant extracting solution: parching 10 parts of hawthorn and 18 parts of fructus aurantii for 20min, adding water with the mass 3 times of that of the fried raw materials, decocting for 2.5h, filtering to obtain a decoction, and adding vinegar to adjust the pH value to 5.2-5.5.

s1, preprocessing: spraying pretreatment liquid accounting for 80% of the mass of the original dried orange peel drug on the original dried orange peel drug by using an atomization distributor, and moistening the original dried orange peel drug for a certain time; wherein, the pretreatment liquid comprises: 50 parts of vinegar, 10 parts of yellow wine and 20 parts of plant extract; the moistening temperature is 25 deg.C, and the time is 30 min.

S2, steaming: placing the pretreated pericarpium Citri Tangerinae original drug in a steamer, steaming with water vapor under normal pressure for 35min after steaming to boil up gas;

s3, cutting: taking out steamed pericarpium Citri Tangerinae, cooling, and shredding to 2-5mm width;

s4, drying: drying at 50 deg.C to obtain dried pericarpium Citri Tangerinae;

s5, storage: and (3) placing the obtained dried tangerine peel in a 150kPa pressurized environment for storage, wherein the storage temperature is 40 ℃, and the storage process is subjected to sterilization treatment to obtain steamed tangerine peel.

Example 3

Preparing a plant extracting solution: parching 20 parts of radix ophiopogonis and 15 parts of liquorice for 25min, adding water with the mass 5 times that of the fried raw materials, decocting for 0.5h, filtering to obtain a decoction, and adding vinegar to adjust the pH value to 5.5-5.8.

s1, preprocessing: spraying pretreatment liquid accounting for 30% of the mass of the original dried orange peel drug on the original dried orange peel drug by using an atomization distributor, and moistening the original dried orange peel drug for a certain time; wherein, the pretreatment liquid comprises: 20 parts of vinegar, 20 parts of yellow wine and 10 parts of plant extract; the moistening temperature is 30 deg.C, and the time is 25 min.

S2, steaming: placing the pretreated pericarpium Citri Tangerinae original drug in a steamer, steaming with water vapor under normal pressure for 30min after steaming to upper air;

s3, cutting: taking out steamed pericarpium Citri Tangerinae, cooling, and shredding to 6-10mm width;

s4, drying: drying in the sun to obtain dried pericarpium Citri Tangerinae;

s5, storage: and (3) placing the obtained dried tangerine peel in a 140kPa pressurized environment for storage, wherein the storage temperature is 37 ℃, and the storage process is subjected to sterilization treatment to obtain steamed tangerine peel.

Example 4

Preparing a plant extracting solution: frying 25 parts of radix ophiopogonis, 10 parts of medlar and 10 parts of jasmine for 15min, adding water with the mass 10 times that of the fried raw materials, decocting for 2h, filtering to obtain a decoction, and adding vinegar to adjust the pH value to 6-6.5.

s1, preprocessing: spraying pretreatment liquid accounting for 40% of the mass of the original dried orange peel drug on the original dried orange peel drug by using an atomization distributor, and moistening the original dried orange peel drug for a certain time; wherein, the pretreatment liquid comprises: 40 parts of vinegar, 30 parts of yellow wine and 8 parts of plant extract; the moistening temperature is 45 deg.C, and the time is 15 min.

S2, steaming: placing the pretreated pericarpium Citri Tangerinae original drug in a steamer, steaming with water vapor under 115kPa until the vapor is in the upper air for 25 min;

s3, cutting: taking out steamed pericarpium Citri Tangerinae, cooling, and shredding to 4-8mm width;

s4, drying: drying in the sun to obtain dried pericarpium Citri Tangerinae;

s5, storage: and (3) placing the obtained dried tangerine peel in a pressurized environment of 130kPa for storage at the temperature of 36 ℃, and performing sterilization treatment in the storage process to obtain steamed tangerine peel.

Example 5

Preparing a plant extracting solution: parching 15 parts of fructus aurantii, 5 parts of liquorice and 5 parts of medlar for 20min, adding water with the mass of 8 times of that of hawthorn, decocting for 1h, filtering to obtain a decoction, and adding vinegar to adjust the pH value to 5.8-6.1.

s1, preprocessing: spraying pretreatment liquid with 50% of the mass of the original dried orange peel drug on the original dried orange peel drug by using an atomization distributor, and moistening the original dried orange peel drug for a certain time; wherein, the pretreatment liquid comprises: 30 parts of vinegar, 30 parts of yellow wine and 12 parts of plant extract; the moistening temperature is 35 deg.C, and the time is 20 min.

S2, steaming: placing the pretreated pericarpium Citri Tangerinae original drug in a steamer, steaming with water vapor under 110kPa, steaming to steam for 20 min;

s3, cutting: taking out the steamed pericarpium Citri Tangerinae, cooling, and shredding to 3-7mm width;

s4, drying: drying at 60 deg.C to obtain dried pericarpium Citri Tangerinae;

s5, storage: and (3) placing the obtained dried tangerine peel in a 120kPa pressurized environment for storage, wherein the storage temperature is 38 ℃, and the storage process is subjected to sterilization treatment to obtain steamed tangerine peel.

Example 6

Preparing a plant extracting solution: frying 18 parts of hawthorn, 15 parts of radix ophiopogonis and 8 parts of jasmine for 20min, adding water with the mass 6 times of that of the hawthorn, decocting for 1h, filtering to obtain a decoction, and adding vinegar to adjust the pH value to 5.0-5.2.

s1, preprocessing: spraying pretreatment liquid accounting for 60% of the mass of the original dried orange peel drug on the original dried orange peel drug by using an atomization distributor, and moistening the original dried orange peel drug for a certain time; wherein, the pretreatment liquid comprises: 35 parts of vinegar, 25 parts of yellow wine and 15 parts of plant extract; the moistening temperature is 40 deg.C, and the time is 20 min.

S2, steaming: placing the pretreated pericarpium Citri Tangerinae original drug in a steamer, steaming with water vapor under 120kPa, steaming to steam until the vapor is up to steam for 15 min;

s3, cutting: taking out the steamed pericarpium Citri Tangerinae, cooling, and shredding to 4-6mm width;

s4, drying: drying at 65 deg.C to obtain dried pericarpium Citri Tangerinae;

s5, storage: and (3) placing the obtained dried tangerine peel in a 130kPa pressurized environment for storage, wherein the storage temperature is 38 ℃, and the storage process is carried out with sterilization treatment, thus obtaining the steamed tangerine peel.

Comparative example 1

In step S1, only vinegar (the amount was equal to the total amount of the pretreatment solution) was used, and the rest was the same as in example 5.

COMPARATIVE EXAMPLE 2(CN 103989781A)

(1) Cleaning fresh orange peel, drying in the sun, and cutting into pieces no larger than 2cm × 2 cm;

(2) spraying Chinese liquor on two sides of pericarpium Citri Tangerinae with sprayer, transferring the pericarpium Citri Tangerinae slices into a Chinese medicinal cooking machine, adding water 2 times the mass of pericarpium Citri Tangerinae, moistening at 40 deg.C for 1 hr, steaming at 100 deg.C for 5min, taking out, air drying, sealing and storing for 1 year to obtain pericarpium Citri Tangerinae.

Comparative example 3 (Chinese pharmacopoeia processing method)

(1) Cleaning fresh orange peel, and cutting into pieces no larger than 2cm × 2 cm;

(2) wetting pericarpium Citri Tangerinae slices with water, transferring into a Chinese medicinal steaming machine, moistening at room temperature for 2 hr, taking out, air drying, and shredding to obtain pericarpium Citri Tangerinae.

Comparative example 4

The plant extract was adjusted in pH without adding vinegar, and the procedure was the same as in example 5.

Comparative example 5

The same procedure as in example 5 was repeated except that the composition was hermetically sealed at ordinary temperature and pressure (25 ℃ C., 101 kPa).

The content of effective components of the processed dried orange peels obtained in the examples 1 to 6 and the comparative examples 1 to 8 is tested, and the specific test process is as follows:

(1) determination of hesperidin content

Preparation of a test solution: taking 1g of pericarpium citri reticulatae raw drug and about 1g of pericarpium citri reticulatae sample powder obtained by the processing method of the embodiments 1 to 6 and the comparative examples 1 to 7, precisely weighing, placing in a Soxhlet extractor, adding 80ml of petroleum ether (60 to 90 ℃), heating and refluxing for 2 to 3 hours, discarding the petroleum ether, volatilizing the medicinal residue, adding 80ml of methanol, heating and refluxing until the extracting solution is colorless, cooling, filtering, placing the filtrate in a 100ml measuring flask, washing the container with a small amount of methanol for several times, filtering the washing solution into the same measuring flask, adding methanol to the scale, and shaking up to obtain a sample solution.

Preparation of control solutions: taking appropriate amount of hesperidin control, precisely weighing, and adding methanol to obtain solution containing 0.4mg per 1 ml.

Measuring by high performance liquid chromatography (general rule 0512).

Chromatographic conditions and system applicability test: octadecylsilane chemically bonded silica is used as a filling agent; methanol-acetic acid-water (35: 4: 61) is used as a mobile phase; the detection wavelength was 283 nm. The number of theoretical plates is not less than 2000 calculated according to hesperidin peak.

The determination method comprises the following steps: precisely sucking 5 μ l of each of the reference solution and the sample solution, injecting into liquid chromatograph, and measuring.

The test analysis was repeated 3 times for each sample, and the average was taken as the final data, and the results are shown in Table 1.

(2) Determination of the type and content of volatile oil

Pulverizing pericarpium Citri Tangerinae, and sieving to obtain pericarpium Citri Tangerinae powder. Accurately weighing 50g of tangerine peel powder in a round-bottom flask, adding 100mL of petroleum ether, heating and refluxing for extraction twice, combining extracting solutions, cooling, filtering, concentrating filtrate under reduced pressure to obtain a paste, mixing the extract with anhydrous yellow wine in a volume ratio of 1: 10, stirring, and freezing at-20 deg.C for 4 h; filtering with filter paper, and concentrating the filtrate under reduced pressure to obtain pericarpium Citri Tangerinae volatile extract; the extract was analyzed by gas chromatography-mass spectrometry. Chromatographic conditions are as follows: HP-INNOWAX capillary chromatography column (30m × 250 μm × 0.25 μm) with carrier gas He at flow rate of 1.0 mL/min; the programmed heating mode is adopted, the initial temperature is 50 ℃, the temperature is kept for 5min, the temperature is increased to 160 ℃ at the speed of 2 ℃/min, the temperature is kept for 5min, and then the temperature is increased to 250 ℃ at the speed of 12 ℃/min, and the temperature is kept for 5 min. The injection port temperature is 250 ℃, the split ratio is 40: 1. mass spectrum conditions: signals are collected in a full scanning mode, an ionization source is EI, and ionization energy is 70 eV; the interface temperature is 280 ℃, the ion source temperature is 200 ℃, the quadrupole rod temperature is 150 ℃, and the scanning mass range is 35 amu-500 amu.

The test analysis was repeated 3 times for each sample and averaged to give the final data.

The results before storage are shown in Table 1.

TABLE 1

Note: the relative deviation of the data in table 1 is within 2.5%.

As can be seen from the data in Table 1, compared with the existing method for processing steamed tangerine peel, the steamed tangerine peel obtained by the method of the invention has the advantages that the types of volatile oil, hesperidin and the content of volatile oil are greatly improved, the types and the content of active ingredients are more, and the effect of steaming tangerine peel is more favorably exerted. Compared with comparative examples 2-3, the content of effective components and the storage time of the steamed orange peel obtained by the method are far higher than those of the prior art. Compared with the comparative example 1, the components in the plant extracting solution act together, so that the content of hesperidin in the dried orange peel and the type and content of volatile oil are improved, and the storage time of the dried orange peel is greatly prolonged. Compared with the comparative example 4, the pH is adjusted to a proper range, the conversion generation of the hesperidin is facilitated, but the influence on the type and content of the volatile oil and the storage time of the dried orange peel is little.

Data of examples 1 to 6 and comparative example 5 after half a year storage are shown in Table 2.

TABLE 2

As can be seen from the data in Table 2, compared with comparative example 5, the content of hesperidin and volatile oil in example 5 is greatly increased after the storage for 1 year; the data of comparative example 5 did not change significantly. The results of examples 1-6 show that the preservation method of the invention is beneficial to improving the quality of the dried orange peel.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments, or make equivalent substitutions and improvements to part of the technical features of the foregoing embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The preparation method of the steamed dried orange peel is characterized by comprising the following steps:

s1, preprocessing: spraying the pretreatment solution on the original pericarpium citri reticulatae drug by using an atomization distributor, and moistening the wet original pericarpium citri reticulatae drug for a certain time; the amount of the pretreatment liquid is 0.5-10% of the mass of the original dried orange peel, the smoldering temperature is 25-50 ℃, and the time is 5-30 min; the pretreatment solution is a plant extracting solution with a pH value of 4.5-6.5, and the preparation method of the plant extracting solution comprises the following steps: frying the raw materials of the plant extract for 10-30 min, adding water which is 3-12 times of the weight of the raw materials, decocting for 0.5-3 h, filtering to obtain a decoction, and adding vinegar to adjust the pH value; the plant extract comprises 0-30 parts of hawthorn, 0-30 parts of fructus aurantii, 0-30 parts of radix ophiopogonis, 0-20 parts of liquorice, 0-20 parts of medlar and 0-20 parts of jasmine;

s2, steaming: placing the pretreated pericarpium citri reticulatae original drug in a food steamer for steaming, and steaming for 5-40 min after the pericarpium citri reticulatae original drug is steamed to be up to the air; the steaming is normal-pressure steaming or high-pressure steaming, and the pressure of the high-pressure steaming is 100-120 kPa;

s4, drying: drying the obtained dried tangerine peel filaments at 40-70 ℃ or drying in the sun to obtain dried tangerine peel;

s5, storage: and (3) placing the obtained dried tangerine peel in a pressurized environment for storage, wherein the storage air pressure is 110-.

2. Steamed dried orange peel, characterized in that it is obtained according to the method of claim 1.