CN112391232A - Composite grease protective agent, preparation method and application thereof - Google Patents
Composite grease protective agent, preparation method and application thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11B—PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
- C11B5/00—Preserving by using additives, e.g. anti-oxidants
- C11B5/0092—Mixtures
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Abstract
The invention provides a compound grease protective agent and a preparation method and application thereof, belonging to the field of food grease processing, the compound grease protective agent comprises, by weight, 1-40 parts of bergamot peel, 1-50 parts of vine tea powder, 20-60 parts of rosemary, 16-70 parts of lophatherum gracile, 1-9 parts of liquorice and 0.5-15 parts of guava leaves, is safe and non-toxic, is easy to prepare, and the compatibility is reasonable, the synergistic interaction can be exerted, so that the composite grease protective agent has obvious effect, can effectively reduce the deterioration of unsaturated fatty acid and the oxidative rancidity of lipid in the storage process of the edible oil at low dose, prolong the shelf life of the edible oil, protect natural nutrient substances in the oil, and the edible oil has high stability, strong long-term oxidation resistance, rich nutrition and no bad flavor, and can meet the requirements of consumers on the health and safety of the edible oil.
Description
Technical Field
The invention relates to the field of food oil processing, in particular to a compound oil protective agent, a preparation method and application thereof.
Background
The unsaturated fatty acid is essential fatty acid, and has effects of ensuring normal physiological function of cells, reducing blood viscosity and content of cholesterol and triglyceride in blood, improving brain cell activity, and enhancing memory and thinking ability. The lack of unsaturated fatty acids in the body affects the intelligence development of infants, so it must be supplemented from the diet. During storage of food, complex changes occur under the action of light, heat, oxygen in the air, and water and enzymes in the oil and fat, resulting in lipid oxidation. Lipid oxidation affects the quality and the shelf life of the oil during storage, so that fat-soluble nutrient components, the special flavor and the texture of the oil are changed badly, and in addition, peroxide generated by the oxidative degradation of the oil and aldehyde, ketone, alcohol, hydrocarbon, fatty acid, epoxide, dimer and trimer generated by decomposition and polymerization generate strong pungent odor, present toxicity and directly threaten the health of consumers.
In recent decades, chemically synthesized antioxidants, such as tert-butylhydroquinone (TBHQ), Butylated Hydroxyanisole (BHA), Butylated Hydroxytoluene (BHT), and the like, have been widely used to retard oxidative degradation of lipids due to their high oxidative stability and low cost. However, the long-term use of chemically synthesized antioxidants may cause degenerative diseases in humans, and side effects and potential safety hazards are inevitable. Meanwhile, the chemically synthesized antioxidant has the characteristics of color change and poor stability, and has certain limitation in the application of edible oil protection. Research shows that natural food source substances show certain effects on the nutrition and quality protection of the oil. Therefore, the development of the composite natural healthy, efficient and long-acting edible oil protective agent has important application significance in the processing of edible oil meeting the requirements of high efficiency, long acting and diversified oil varieties.
To this end, chinese patent document CN109757694A discloses an oil and fat composition, wherein the antioxidant properties of oil and fat are improved by adding one or more antioxidants selected from butyl hydroxy anisole, 2, 6-di-tert-butyl-4-methylphenol, vitamin E, ascorbyl palmitate, tea polyphenol, tert-butyl hydroquinone, propyl gallate, rosemary extract, licorice antioxidant, hydroxystearyl, ascorbic acid, bamboo leaf antioxidant, dilauryl thiodipropionate, phytic acid, and the like, wherein tea polyphenol, bamboo leaf antioxidant, rosemary extract, licorice antioxidant, and the like are all natural food source materials, and the inventors have found that in the course of research and development, the natural oil and fat protectant is compounded by using the above natural food source materials in equal proportions to obtain a compound natural oil and fat, and experiments show that although the compound natural oil and fat protectant has a good short-term antioxidant ability, but the long-term oxidation resistance is low, the contents of linoleic acid and linolenic acid in the grease are obviously reduced after the grease is placed for 1 month at high temperature, the oxidation value is improved, and the use requirement of protecting the grease cannot be met.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to overcome the defects of poor stability and low long-term oxidation resistance of the compound natural grease protective agent in the prior art, so as to provide the compound grease protective agent, the preparation method and the application thereof.
The invention provides a compound grease protective agent which comprises, by weight, 1-40 parts of bergamot peel, 1-50 parts of vine tea powder, 20-60 parts of rosemary, 16-70 parts of lophatherum gracile, 1-9 parts of liquorice and 0.5-15 parts of guava leaves.
Further, the rosemary is produced in Yunnan plateau.
The invention also provides a method for preparing the compound grease protective agent, which comprises the following steps:
(1) crushing bergamot peel, adding absolute ethyl alcohol, performing ultrasonic extraction, filtering, and collecting bergamot peel filtrate;
(2) adding pure water into the bergamot peel filtrate prepared in the step (1), uniformly mixing, adding the vine tea powder, performing ultrasonic microwave synergistic extraction, filtering, collecting the filtrate, evaporating to dryness, and freeze-drying to obtain a bergamot peel vine tea extract;
(3) mixing rosemary, lophatherum gracile, liquorice, guava leaves and bergamot peel vine tea extracts to obtain a mixed material, crushing the mixed material, and drying to obtain the composite oil protective agent.
Further, in the step (1), the volume ratio of the mass of the bergamot peel to the absolute ethyl alcohol is 1 kg: (8-12) L;
in the step (2), the volume ratio of the bergamot peel filtrate to water is 1: 2-2: 1.
Further, in the step (1), the bergamot peel is crushed to the particle size of 20-100 nm;
in the step (3), the mixed material is crushed to a particle size of 1-100 μm.
Further, in the step (2), in the ultrasonic microwave synergistic extraction process, the microwave power is controlled to be 200-1000W, the ultrasonic power is controlled to be 800-1200W, and the extraction time is 1-3 h.
Further, in the step (3), before crushing the mixed material, the method further comprises the step of subjecting the mixed material to ultra-static water pressure treatment for 10-30 min under the pressure of 300-600 Mpa.
The invention also provides the application of the compound grease protective agent or the compound grease protective agent prepared by any one of the methods in grease storage.
Further, adding the compound grease protective agent into the grease according to the addition amount of 0.1-2 g of the compound grease protective agent per kg of the grease, and uniformly mixing.
Further, dissolving the compound grease protective agent in absolute ethyl alcohol, then adding the grease, stirring for 10-25 min, and uniformly mixing.
Further, the oil is edible oil; the edible oil is at least one of edible vegetable oil, edible animal oil and edible vegetable blend oil.
The technical scheme of the invention has the following advantages:
1. the composite grease protective agent provided by the invention comprises 1-40 parts of bergamot peel, 1-50 parts of vine tea powder, 20-60 parts of rosemary, 16-70 parts of lophatherum gracile, 1-9 parts of liquorice and 0.5-15 parts of guava leaf according to the weight parts, is safe, non-toxic and easy to prepare, moreover, the bergamot peel, the turnera tea powder, the rosemary, the lophatherum gracile, the liquorice and the guava leaf can play a role in synergy and have reasonable compatibility, so that the composite oil protective agent has obvious oil protection effect, can effectively reduce the deterioration of unsaturated fatty acid and the oxidative rancidity of lipid in the storage process of the edible oil at low dose, prolong the shelf life of the edible oil, protect natural nutrient substances in the oil, and the edible oil has high stability, strong long-term oxidation resistance, rich nutrition and no bad flavor, and can meet the requirements of consumers on the health and safety of the edible oil.
2. According to the preparation method of the compound grease protective agent provided by the invention, through limited and repeated screening, the inventor finds that the bergamot peel is extracted firstly through absolute ethyl alcohol to obtain a bergamot peel extracting solution, and the bergamot peel extracting solution can better play a synergistic effect after being mixed with other components, so that the prepared compound grease protective agent has better oxidation resistance. Meanwhile, the fructus citri sarcodactylis extract is added into the rattan tea powder after being added into water, and ultrasonic microwaves are utilized to cooperatively extract the rattan tea powder, so that the extraction rate of active ingredients in the rattan tea powder is improved, the rattan tea powder and the citrus bergamot peel can better play a role in synergy, and the prepared composite grease protective agent has better oxidation resistance.
3. The preparation method of the composite grease protective agent provided by the invention comprises the step of carrying out ultra-static water pressure treatment on the mixed material for 10-30 min under the pressure of 300-600 Mpa before crushing the mixed material, wherein the ultra-static water pressure treatment on the mixed material is not only beneficial to releasing and extracting active ingredients in each component, but also can sterilize each component and improve the use safety.
4. The composite grease protective agent provided by the invention is applied to grease storage, not only has extremely strong oxidation resistance, but also contains various natural active ingredients for delaying senility, tranquilizing and allaying excitement, inhibiting bacteria and protecting cardiovascular, and has higher nutrition and health care effects.
Detailed Description
Example 1
The compound grease protective agent provided by the embodiment comprises the following raw materials:
20g of bergamot peel, 20g of vine tea powder, 45g of rosemary, 47g of lophatherum gracile, 4g of liquorice and 0.6g of guava leaf.
The preparation method of the compound grease protective agent provided by the embodiment comprises the following steps:
(1) collecting 20g of bergamot peel, pulverizing with nanometer high-pulse machine, adding 200ml of anhydrous ethanol, performing ultrasonic extraction at 4 deg.C for 30min, filtering, and collecting bergamot peel filtrate.
(2) Adding isovolumetric pure water into the bergamot peel filtrate, uniformly mixing, adding 20g of Teng tea powder, placing in an ultrasonic and microwave combined reactor, controlling the microwave power to be 500W and the ultrasonic power to be 1000W, extracting for 2h, filtering, collecting the filtrate, performing rotary evaporation on the filtrate to obtain a paste, and freeze-drying to obtain the bergamot peel vine tea extract.
(3) And (3) mixing the bergamot peel vine tea extract prepared in the step (2), 45g of rosemary, 47g of lophatherum gracile, 4g of liquorice and 0.6g of guava leaf to obtain a mixed material, carrying out ultra-hydrostatic pressure treatment on the mixed material at the room temperature under the pressure of 600MPa for 20min, then carrying out ultra-fine crushing, drying in an oven at the temperature of 71 ℃ for 12min, and carrying out vacuum packaging in an aluminum foil bag to obtain a finished product of the compound grease protectant.
When in use, 0.4g of the finished compound grease protective agent is weighed and dissolved in 1ml of absolute ethyl alcohol. Adding into 1kg oleum Juglandis under stirring at room temperature, and stirring for 20 min.
Example 2
The compound grease protective agent provided by the embodiment comprises the following raw materials:
17g of bergamot peel, 17g of vine tea powder, 39g of rosemary, 52g of lophatherum gracile, 2.2g of liquorice and 4g of guava leaf.
The preparation method of the compound grease protective agent provided by the embodiment comprises the following steps:
(1) taking 17g of bergamot peel, crushing by using a nanometer high-pulse machine, adding 200ml of absolute ethyl alcohol, performing ultrasonic extraction at 4 ℃ for 30min, filtering, and collecting bergamot peel filtrate.
(2) Adding isovolumetric pure water into the bergamot peel filtrate, uniformly mixing, adding 17g of Teng tea powder, placing in an ultrasonic and microwave combined reactor, controlling the microwave power to be 500W and the ultrasonic power to be 1000W, extracting for 2h, filtering, collecting filtrate, performing rotary evaporation on the filtrate to obtain paste, and freeze-drying to obtain the bergamot peel vine tea extract.
(3) And (3) mixing the bergamot peel vine tea extract prepared in the step (2), 39g of rosemary, 52g of lophatherum gracile, 2.2g of liquorice and 4g of guava leaves to obtain a mixed material, carrying out ultra-hydrostatic pressure treatment on the mixed material at room temperature under the pressure of 540MPa for 23min, then carrying out ultra-micro crushing, drying in an oven at 70 ℃ for 13min, and carrying out vacuum packaging in an aluminum foil bag to obtain a finished product of the compound oil protective agent.
When in use, 0.6g of the finished compound grease protectant is weighed and dissolved in 1.2ml of absolute ethyl alcohol. Adding into 1kg of walnut and linseed blend oil under stirring at room temperature, and stirring for 15 min.
Example 3
The compound grease protective agent provided by the embodiment comprises the following raw materials:
6g of bergamot peel, 6g of Teng tea powder, 51g of rosemary, 37g of lophatherum gracile, 5g of liquorice and 6g of guava leaf.
The preparation method of the compound grease protective agent provided by the embodiment comprises the following steps:
(1) collecting pericarpium Citri Sarcodactylis 6g, pulverizing with nanometer high-pulse machine, adding 200ml anhydrous ethanol, extracting with ultrasound at 4 deg.C for 30min, filtering, and collecting pericarpium Citri Sarcodactylis filtrate.
(2) Adding isovolumetric pure water into the bergamot peel filtrate, uniformly mixing, adding 6g of Teng tea powder, placing in an ultrasonic and microwave combined reactor, controlling the microwave power to be 500W and the ultrasonic power to be 1000W, extracting for 2h, filtering, collecting the filtrate, performing rotary evaporation on the filtrate to obtain a paste, and freeze-drying to obtain the bergamot peel vine tea extract.
(3) And (3) mixing the bergamot peel vine tea extract prepared in the step (2), 51g of rosemary, 37g of lophatherum gracile, 5g of liquorice and 6g of guava leaves to obtain a mixed material, carrying out ultra-hydrostatic pressure treatment on the mixed material at room temperature under the pressure of 500MPa for 15min, then carrying out ultra-fine crushing, drying in an oven at 74 ℃ for 11min, and carrying out vacuum packaging in an aluminum foil bag to obtain a finished product of the compound oil protective agent.
When in use, 0.5g of the grease protective agent is weighed and dissolved in 1ml of absolute ethyl alcohol. Adding into 1kg adeps Sus Domestica under stirring at room temperature, and stirring for 20 min.
Example 4
The compound grease protective agent provided by the embodiment comprises the following raw materials:
20g of bergamot peel, 20g of vine tea powder, 45g of rosemary, 47g of lophatherum gracile, 4g of liquorice and 0.6g of guava leaf.
The preparation method of the compound grease protective agent provided by the embodiment comprises the following steps:
(1) taking 20g of bergamot peel, crushing by using a nano high-pulse machine, adding 200ml of absolute ethyl alcohol, performing ultrasonic extraction at 4 ℃ for 30min, filtering, collecting bergamot peel filtrate, adding 200ml of pure water, uniformly mixing, placing in an ultrasonic and microwave combined reactor, controlling the microwave power to be 500W and the ultrasonic power to be 1000W, extracting for 2h, filtering, collecting filtrate, performing rotary evaporation on the filtrate to obtain a paste, and freeze-drying to obtain the bergamot extract.
(2) Taking 20g of vine tea powder, adding 400ml of 50 wt% ethanol water solution, placing in an ultrasonic and microwave combined reactor, controlling the microwave power to be 500W and the ultrasonic power to be 1000W, extracting for 2h, filtering, collecting filtrate, performing rotary evaporation on the filtrate to obtain paste, and freeze-drying to obtain the vine tea extract.
(3) And (3) mixing the bergamot peel vine tea extract prepared in the step (2), 1.7g of vine tea extract, 45g of rosemary, 47g of lophatherum gracile, 4g of liquorice and 0.6g of guava leaf to obtain a mixed material, carrying out ultra-hydrostatic pressure treatment on the mixed material at the room temperature under the pressure of 600MPa for 20min, then carrying out ultra-fine crushing, drying in an oven at the temperature of 71 ℃ for 12min, and carrying out vacuum packaging in an aluminum foil bag to obtain a finished product of the compound grease protectant.
When in use, 0.4g of the finished compound grease protective agent is weighed and dissolved in 1ml of absolute ethyl alcohol. Adding into 1kg oleum Juglandis under stirring at room temperature, and stirring for 20 min.
Comparative example 1
The compound grease protective agent provided by the embodiment comprises the following raw materials:
20g of citrus peel, 20g of green tea powder, 45g of rosemary, 47g of lophatherum gracile, 4g of liquorice and 0.6g of guava leaf.
The preparation method of the compound grease protective agent provided by the embodiment comprises the following steps:
(1) pulverizing 20g of pericarpium Citri Tangerinae with nanometer high-pulse machine, adding 200ml of anhydrous ethanol, extracting with ultrasound at 4 deg.C for 30min, filtering, and collecting the ethanol extract of pericarpium Citri Tangerinae.
(2) Adding the citrus peel ethanol extract into pure water with the same volume, uniformly mixing, adding 20g of green tea powder, placing in an ultrasonic and microwave combined reactor, controlling the microwave power at 500W and the ultrasonic power at 1000W, extracting for 2h, filtering, collecting filtrate, performing rotary evaporation on the filtrate to obtain a paste, and freeze-drying to obtain the citrus peel green tea extract.
(3) Taking 3.4g of the orange peel green tea extract prepared in the step (2), 45g of rosemary, 47g of lophatherum gracile, 4g of liquorice and 0.6g of guava leaf, mixing to obtain a mixed material, carrying out ultra-static water pressure treatment on the mixed material at the room temperature under the pressure of 600MPa for 20min, then carrying out ultra-micro crushing, drying in an oven at 71 ℃ for 12min, and carrying out vacuum packaging in an aluminum foil bag to obtain a finished product of the compound grease protectant.
Comparative example 2
The compound grease protective agent provided by the embodiment comprises the following raw materials:
45g of rosemary, 47g of lophatherum gracile, 4g of liquorice and 0.6g of guava leaf.
The preparation method of the compound grease protective agent provided by the embodiment comprises the following steps:
and (2) mixing 45g of rosemary, 47g of lophatherum gracile, 4g of liquorice and 0.6g of guava leaves to obtain a mixed material, carrying out ultra-hydrostatic pressure treatment on the mixed material at room temperature under the pressure of 600MPa for 20min, then carrying out ultra-fine crushing, drying in an oven at the temperature of 71 ℃ for 12min, and carrying out vacuum packaging in an aluminum foil bag to obtain the finished product of the compound grease protectant.
Experimental example 1
The walnut oil, the walnut linseed blend oil, the lard oil and the walnut oil in the examples 1-4 are stored for 36 days at 60 ℃ by adopting a Schaal oven accelerated oxidation method, the walnut oil, the walnut linseed blend oil, the lard oil and the walnut oil which are not added with the finished product of the compound grease protectant are respectively used as reference substances, the treatment is carried out under the same conditions, the sampling is carried out at the same time during the storage period, the contents and the peroxide values of linoleic acid and linolenic acid in the grease of each sample are measured, and the results are shown in tables 1 and 2.
TABLE 1% content of linoleic acid and linolenic acid
TABLE 2 Change in peroxide number (meq/kg) during storage of oils and fats
As can be seen from tables 1 and 2, the composite grease protective agent finished products prepared in the embodiments 1 to 4 of the invention can effectively reduce the content reduction of linoleic acid and linolenic acid, slow down the increase of peroxide value in the grease storage process, and can effectively protect edible grease. Further, compared with embodiment 4, the compound grease protective agent finished product prepared in embodiment 1 of the invention has better protection effect and stability on grease, and stronger long-term oxidation resistance.
Experimental example 2
And preparing a finished product of the compound grease protective agent according to the methods of the examples 1-4 and the comparative examples 1-2 respectively. Respectively weighing 0.5g of the finished compound grease protectant, dissolving in 1ml of absolute ethanol, stirring at room temperature, adding into 1kg of walnut oil, and stirring for 20min to obtain 6 groups of samples to be tested. Then taking 1ml of absolute ethyl alcohol, stirring at room temperature, then adding into 1kg of walnut oil, and stirring for 20min to obtain a blank reference substance.
And (3) storing the sample to be detected and the blank reference substance for 36 days at the same time by adopting a Schaal oven accelerated oxidation method, sampling at the same time, and determining the contents and peroxide values of linoleic acid and linolenic acid in the oil of each sample.
TABLE 3 Change in peroxide value (meq/kg) during storage of oils and fats
As can be seen from Table 3, compared with comparative example 1 and comparative example 2, the composite oil protective agent finished products prepared in the embodiments 1-4 of the invention can obviously slow down the increase of peroxide value in the oil storage process, can protect edible oil for a long time, prolong the shelf life of the edible oil, have strong stability and obviously improve long-term oxidation resistance.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (10)
1. The compound grease protective agent is characterized by comprising, by weight, 1-40 parts of bergamot peel, 1-50 parts of vine tea powder, 20-60 parts of rosemary, 16-70 parts of lophatherum gracile, 1-9 parts of liquorice and 0.5-15 parts of guava leaves.
2. The compound grease protectant according to claim 1, wherein the rosemary is produced in Yunnan plateau.
3. A method for preparing the compound grease protectant according to claim 1 or 2, which is characterized by comprising the following steps:
(1) crushing bergamot peel, adding absolute ethyl alcohol, performing ultrasonic extraction, filtering, and collecting bergamot peel filtrate;
(2) adding pure water into the bergamot peel filtrate prepared in the step (1), uniformly mixing, adding the vine tea powder, performing ultrasonic microwave synergistic extraction, filtering, collecting the filtrate, evaporating to dryness, and freeze-drying to obtain a bergamot peel vine tea extract;
(3) mixing rosemary, lophatherum gracile, liquorice, guava leaves and bergamot peel vine tea extracts to obtain a mixed material, crushing the mixed material, and drying to obtain the composite oil protective agent.
4. The preparation method of the compound grease protectant according to claim 3,
in the step (1), the volume ratio of the mass of the bergamot peel to the absolute ethyl alcohol is 1 kg: (8-12) L.
5. The preparation method of the compound grease protective agent according to claim 3 or 4, characterized in that in the step (2), the volume ratio of the bergamot peel filtrate to water is 1: 2-2: 1.
6. The preparation method of the compound grease protectant according to any one of claims 3-5, wherein in the step (2), in the ultrasonic-microwave synergistic extraction process, the microwave power is controlled to be 200-1000W, the ultrasonic power is controlled to be 800-1200W, and the extraction time is 1-3 h.
7. The preparation method of the composite grease protectant according to any of claims 3-6, wherein the step (3) further comprises subjecting the mixed material to ultra-static water pressure treatment at a pressure of 300-600 MPa for 10-30 min before crushing the mixed material.
8. Use of the composite oil and fat protective agent according to claim 1 or 2 or the composite oil and fat protective agent produced by the method according to any one of claims 3 to 7 for storage of oil and fat.
9. The application of the oil-fat protective agent as claimed in claim 8, wherein the compound oil-fat protective agent is dissolved in absolute ethyl alcohol, and then the oil-fat protective agent is added into oil-fat according to the addition amount of 0.1-2 g of the compound oil-fat protective agent per kg of oil-fat, and the mixture is uniformly mixed.
10. Use according to claim 8 or 9,
the oil is edible oil; the edible oil is at least one of edible vegetable oil, edible animal oil and edible vegetable blend oil.
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| CN115501149A (en) * | 2022-09-27 | 2022-12-23 | 广州丝芬化妆品有限公司 | Antioxidant composition and preparation method and application thereof |
| CN113966839B (en) * | 2021-10-14 | 2024-05-14 | 恒枫食品科技有限公司 | Composite emulsion containing walnut oil and dihydromyricetin and preparation method thereof |
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| 王恩花，等: "藤茶源二氢杨梅素对贵州传统香肠的抗氧化活性评价" * |
| 陆洋，等: "复配天然抗氧化剂对食用油脂抗氧化效果研究" * |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113966839A (en) * | 2021-10-14 | 2022-01-25 | 恒枫食品科技有限公司 | Composite emulsion containing walnut oil and dihydromyricetin and preparation method thereof |
| CN113966839B (en) * | 2021-10-14 | 2024-05-14 | 恒枫食品科技有限公司 | Composite emulsion containing walnut oil and dihydromyricetin and preparation method thereof |
| CN115501149A (en) * | 2022-09-27 | 2022-12-23 | 广州丝芬化妆品有限公司 | Antioxidant composition and preparation method and application thereof |
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