Extraction method and application of sunflower seed oil body with good color and stability

Abstract

The invention relates to an extraction method and application of a sunflower seed oil body with good color and stability, and the extraction method has the advantages that sunflower seeds are soaked in a 0.1 M NaHCO3 solution at a constant temperature for 10-14 hours and then filtered to obtain a mixture, then a 0.1 M NaCl solution is added, and then pulping, water bath heating and centrifugation are performed to obtain the sunflower seed oil body. The sunflower seed oil body extracted through combined use of NaHCO3 and NaCl has good color and physical stability, the current situation that the sunflower seed oil body is deep in color and poor in stability is effectively solved, the application range of the sunflower seed oil body is widened, and the extraction method is simple in process, environmentally friendly, high in economic benefit and suitable for industrial production. The method has important application value in food processing.

Description

Technical Field

[0001] The invention belongs to the field of vegetable oil processing, and in particular relates to an extraction method and application of sunflower seed oil with good color and stability. Background Art

[0002] Oil bodies are important organelles for storing lipids in plant seeds. They are primarily composed of triacylglycerols, phospholipids, and endogenous proteins. Phospholipids, along with embedded endogenous proteins such as oleosins, steroleosin, and calceoleosin, form a phospholipid monolayer that protects stored lipids from oxidative degradation. Furthermore, because plant oil bodies can form stable emulsions without homogenization, they are widely used in the food industry, particularly as natural emulsifiers, oil body gels, and carriers for delivering active ingredients. Therefore, extracting oil bodies with good oil body stability has become a hot topic. Sunflower seeds, as the world's fourth largest oil crop, have significant edible and economic value, making sunflower seed oil bodies highly sought after by consumers.

[0003] Currently, there are numerous methods for extracting plant oil bodies, primarily including aqueous extraction, twin-screw pressing, and ultrasound-assisted extraction. Aqueous extraction is favored for its simplicity, environmental friendliness, and low maintenance costs. Aqueous extraction primarily refers to a series of methods using water as the extraction medium, including aqueous solutions, aqueous enzymes, and PBS extraction. However, due to the diverse composition of oil crops, the extraction of oil bodies requires the selection of a specific extraction method or process tailored to the unique characteristics of the crop.

[0004] Currently, NaHCO3 can ensure the stability of sunflower oil bodies by removing foreign proteins and increasing the repulsive forces between oil bodies. However, the alkaline environment during NaHCO3 extraction causes polyphenols in the sunflower seeds to interact with proteins, resulting in a darker oil body color, which limits the application of sunflower oil bodies in the food industry. Therefore, in order to achieve the efficient utilization of sunflower oil bodies and ensure their widespread application in the food industry, it is urgent to select a suitable extraction method for sunflower oil bodies.

[0005] Currently, no effective solution has been proposed to the problem of dark color and poor stability of sunflower seed oil bodies in the food industry, and there is no independent intellectual property rights involving the research on an extraction method for sunflower seed oil bodies with light color and good physical stability. Summary of the Invention

[0006] The purpose of the present invention is to address at least one of the shortcomings of the prior art and provide a method for extracting sunflower seed oil bodies with good color and stability and their application, so as to solve the problem in the related art that sunflower seed oil bodies have a dark color and poor stability, which limits their application in the food industry.

[0007] To achieve the above object, the technical solution adopted by the present invention is:

[0008] A first aspect of the present invention is to provide a method for extracting sunflower seed oil bodies, comprising the following steps:

[0009] S1. soaking the initial sunflower seeds in a 0.05-0.15 M NaHCO3 solution and filtering to obtain pretreated sunflower seeds;

[0010] S2. adding 0.05-0.15 M NaCl solution to the pretreated sunflower seeds to obtain a mixture;

[0011] S3. Beat the mixture obtained in step S2, heat it in a water bath, and centrifuge to obtain the upper layer to obtain sunflower seed oil bodies.

[0012] Furthermore, in step S1, the mass ratio of the NaHCO3 solution to the initial sunflower seeds is 4-6:0.5-1.5.

[0013] Furthermore, in step S1, the mass ratio of the NaHCO3 solution to the initial sunflower seeds is 5:1.

[0014] Furthermore, the concentration of the NaHCO3 solution is 0.1M.

[0015] Furthermore, the pH of the NaHCO3 solution in step S1 is 8-10, preferably pH=9.

[0016] Furthermore, the soaking in step S1 is performed at a constant temperature of 3 to 5° C. for 10 to 14 hours, preferably at 4° C. for 12 hours.

[0017] Furthermore, the concentration of the NaCl solution is 0.1M.

[0018] Furthermore, in step S2, the mass ratio of the mixture to the initial sunflower seeds is 6-8:1-2.

[0019] Furthermore, in step S2, the mass ratio of the mixture to the initial sunflower seeds is 7:1, that is, the mass ratio of the sum of the increased mass of the NaCl solution and the pretreated sunflower seeds to the initial sunflower seeds is 6:1.

[0020] Furthermore, the beating in step S3 is performed at room temperature for 3 to 6 minutes until there are no obvious sunflower seed particles in the slurry, preferably 4.5 minutes.

[0021] Furthermore, the beating in step S3 is performed using a beating machine. It is understandable that a suitable beating tool can be selected according to needs and the beating parameters can be adjusted accordingly.

[0022] Furthermore, the water bath heating in step S3 is heating at 40-60° C. in a water bath constant temperature oscillator for 0.6-1.3 h.

[0023] Furthermore, the water bath heating in step S3 is heating at 50° C. for 1 h in a water bath constant temperature oscillator.

[0024] Furthermore, the centrifugation in step S3 is performed at 4000-6000 rpm / min for 10-20 min, with the centrifugation being performed 1-2 times.

[0025] Furthermore, the centrifugation in step S3 is performed at a centrifugal speed of 5000 rpm / min, a centrifugal time of 15 min, and two centrifugations.

[0026] In a specific embodiment, the extraction method is performed as follows:

[0027] 1) Soaking 30 g of sunflower seeds in a 0.1 M NaHCO3 solution (pH = 9) at a mass ratio of NaHCO3 solution to sunflower seeds of 5:1 for 12 h at a temperature of 4°C to obtain a mixture A;

[0028] 2) filtering the mixture A to obtain pretreated sunflower seeds, and then adding a 0.1 M NaCl solution, wherein the ratio of the total mass of the NaCl solution and the pretreated sunflower seeds to the mass of the initial sunflower seeds is 6:1, to obtain a mixture B;

[0029] 3) Mixture B was blended in a multi-function food processor at room temperature for 4.5 minutes until no sunflower seed particles were evident in the slurry, to obtain Solution C;

[0030] 4) Place solution C in a digital water bath thermostat and heat it at 50°C for 1 hour to obtain solution D.

[0031] 5) Place solution D in a centrifuge at 5000 rpm / min for 15 min, centrifuging twice.

[0032] Specific embodiments of the present invention are exemplarily described below.

[0033] A second aspect of the present invention provides sunflower seed oil bodies extracted using the extraction method described in the first aspect, wherein the sunflower seed oil bodies are light in color, wherein a*>0 when the color of the oil bodies is measured by a colorimeter, and the particle size of the sunflower seed oil bodies is 1.51 μm to 2.07 μm.

[0034] The third aspect of the present invention is to provide an extraction method as described in the first aspect or an application of the sunflower seed oil body as described in the second aspect, wherein the application includes at least one of the following applications: application in the preparation of sunflower seed oil bodies, application in the preparation of sunflower seed oil, and application in food processing.

[0035] The present invention adopts the above technical solution, which has the following technical effects compared with the prior art:

[0036] The present invention prepares sunflower seed oil bodies by soaking sunflower seeds in a 0.1M NaHCO3 (pH=9) solution at a constant temperature for 10 to 14 hours, filtering the mixture, adding a 0.1M NaCl solution, beating the mixture, heating it in a water bath, and centrifuging it. The sunflower seed oil bodies obtained by combined extraction using NaHCO3 and NaCl not only have good color and physical stability, but also effectively solve the problems of dark color and poor stability of the sunflower seed oil bodies; the extraction process is simple and green, with high economic benefits, and has important application value in natural emulsifiers, oil gels, and delivery of active ingredients. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are only used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0038] Figure 1 This is a diagram showing the appearance of sunflower seed oil bodies extracted using different extraction methods according to an embodiment of the present invention;

[0039] Figure 2 is a graph showing the particle size of sunflower oil bodies extracted using different extraction methods according to an embodiment of the present invention;

[0040] Figure 3 1 is a potential diagram of sunflower seed oil bodies extracted using different methods according to one embodiment of the present invention. DETAILED DESCRIPTION

[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention. The experimental methods in the following examples where specific conditions are not specified are generally measured in accordance with national standards. The experimental materials in the following examples where the source is not specified are all commercially available raw materials. The equipment used in each step of the following examples is conventional equipment. If there are no corresponding national standards, the steps are carried out in accordance with the general international standards, conventional conditions, or the conditions recommended by the manufacturer. Unless otherwise specified, all parts are parts by weight and all percentages are mass percentages. Unless otherwise defined or specified, all professional and scientific terms used in this invention have the same meanings as those familiar to those skilled in the art. In addition, any methods and materials similar or equivalent to those described herein can be applied to the methods of the present invention.

[0042] It should be noted that, unless there is a conflict, the embodiments and features of the embodiments of the present invention may be combined with each other. The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this does not limit the present invention.

[0043] For those steps in the present invention where no manufacturer is specifically marked, conventional products available on the market can be used.

[0044] In certain embodiments of the present invention, the method for extracting sunflower seed oil bodies comprises the following steps:

[0045] 1) soaking sunflower seeds in a 0.05-0.15 M NaHCO3 solution (pH = 8-10), with a mass ratio of NaHCO3 solution to sunflower seeds of 5:1, for 10-14 hours, at a soaking temperature of 3-5°C, to obtain a mixture A with a pH of 8-9;

[0046] 2) filtering the water from the mixture A to obtain pretreated sunflower seeds, and then adding a 0.05-0.15 M NaCl solution, wherein the mass ratio of the total mass of the NaCl solution and the pretreated sunflower seeds to the mass of the initial sunflower seeds is 6-8:1-2, to obtain a mixture B;

[0047] 3) Place mixture B in a multi-function food processor and blend at room temperature for 3-6 minutes until no obvious sunflower seed particles remain in the slurry, to obtain solution C;

[0048] 4) Place solution C in a digital water bath thermostat and heat it at 40-60°C for 0.6-1.3 hours to obtain solution D.

[0049] 5) Place solution D in a centrifuge at a speed of 4000-6000 rpm / min, a centrifugal time of 10-20 min, and 1-2 centrifugal times.

[0050] Specific embodiments of the present invention are exemplarily described below.

[0051] Example 1

[0052] This embodiment relates to a specific method for extracting sunflower seed oil bodies with good color and stability, which specifically includes the following steps:

[0053] Weigh 30 g of sunflower seeds and 0.1 M NaHCO3 (pH = 9) in a mass ratio of 1:5 and soak them in a refrigerator at 4°C for 12 hours to obtain mixture A; filter mixture A to obtain pretreated sunflower seeds, add 0.1 M NaCl solution, and the sum of the increased mass of the NaCl solution and the pretreated sunflower seeds is 6 times the mass of the initial sunflower seeds to obtain mixture B; place mixture B in a beater for beating, and beat at room temperature for 4.5 minutes until there are no obvious sunflower seed particles in the slurry to obtain solution C; place solution C in a digital water bath constant temperature oscillator for water bath heating, maintain the temperature at 50°C, and heat in the water bath for 1 hour to obtain solution D; place solution D in a centrifuge, centrifuge at a speed of 5000 rpm / min, centrifuge time of 15 minutes, centrifuge twice, and carefully remove the sunflower seed oil body after centrifugation.

[0054] Comparative Example 1

[0055] This comparative example relates to a specific method for extracting sunflower seed oil bodies, which specifically includes the following steps:

[0056] Weigh 30 g of sunflower seeds and deionized water in a mass ratio of 1:5 and soak them in a refrigerator at 4°C for 12 hours to obtain a mixture A; filter the mixture A to obtain pretreated sunflower seeds, add deionized water, and the mass ratio of the total mass of deionized water and pretreated sunflower seeds to the initial sunflower seeds is 6:1 to obtain a mixture B; place the mixture B in a beater for beating, and beat at room temperature for 4.5 minutes until there are no obvious sunflower seed particles in the slurry to obtain a solution C; place the solution C in a digital water bath constant temperature oscillator for water bath heating, maintain the temperature at 50°C, and heat in the water bath for 1 hour to obtain a solution D; place the solution D in a centrifuge, centrifuge at a speed of 5000 rpm / min, centrifuge for 15 minutes, and centrifuge twice, and carefully remove the sunflower seed oil body after centrifugation.

[0057] Comparative Example 2

[0058] This comparative example relates to a specific method for extracting sunflower seed oil bodies, which specifically includes the following steps:

[0059] Weigh 30g of sunflower seeds and deionized water in a mass ratio of 1:5 and soak them in a refrigerator at 4℃ for 12h to obtain mixture A; filter mixture A to obtain pretreated sunflower seeds, add deionized water, and the mass ratio of the total mass of deionized water and pretreated sunflower seeds to the initial sunflower seeds is 6:1 to obtain mixture B; place mixture B in a beater for beating, and beat at room temperature for 4.5min until there are no obvious sunflower seed particles in the slurry to obtain solution C; place the composite plant hydrolase in solution C, and the amount of the composite plant hydrolase used is 1.5% (mL / g) of the mass of the sunflower seeds, then place it in a digital water bath constant temperature oscillator, maintain the temperature at 50℃, and heat in a water bath for 1h to obtain solution D; place solution D in a centrifuge, centrifuge at a speed of 5000rpm / min, centrifuge for 15min, and centrifuge twice, and carefully remove the sunflower seed oil body after centrifugation.

[0060] Comparative Example 3

[0061] This comparative example relates to a specific method for extracting sunflower seed oil bodies, which specifically includes the following steps:

[0062] Weigh 30g of sunflower seeds and soak them in deionized water at a mass ratio of 1:5 in a refrigerator at 4℃ for 12h to obtain mixture A; filter mixture A to obtain pretreated sunflower seeds, add 0.1M NaHCO3, and the mass ratio of the total mass of NaHCO3 solution and the increased mass of pretreated sunflower seeds to the initial sunflower seeds is 6:1 to obtain mixture B; place mixture B in a beater for beating, and beat at room temperature for 4.5min until there are no obvious sunflower seed particles in the slurry to obtain solution C; place solution C in a digital water bath constant temperature oscillator for water bath heating, maintain the temperature at 50℃, and heat in the water bath for 1h to obtain solution D; place solution D in a centrifuge, centrifuge at a speed of 5000rpm / min, centrifuge for 15min, and centrifuge twice, and carefully remove the sunflower seed oil body after centrifugation.

[0063] Comparative Example 4

[0064] This comparative example relates to a specific method for extracting sunflower seed oil bodies, which specifically includes the following steps:

[0065] 30 g of sunflower seeds and deionized water were soaked in a refrigerator at a mass ratio of 1:5 in a 4°C refrigerator for 12 h to obtain mixture A; mixture A was filtered to obtain pretreated sunflower seeds, and 0.1 M NaCl was added, and the mass ratio of the total mass of the NaCl solution and the pretreated sunflower seeds to the initial sunflower seeds was 6:1 to obtain mixture B; mixture B was placed in a beater for beating, and the beating was carried out at room temperature for 4.5 min until there were no obvious sunflower seed particles in the slurry to obtain solution C; solution C was placed in a digital water bath constant temperature oscillator for water bath heating, the temperature was maintained at 50°C, and the water bath was heated for 1 h to obtain solution D; solution D was placed in a centrifuge, the centrifugal speed was 5000 rpm / min, the centrifugal time was 15 min, the centrifugal number was 2, and the sunflower seed oil body after centrifugation was carefully removed.

[0066] Comparative Example 5

[0067] This comparative example relates to a specific method for extracting sunflower seed oil bodies, which specifically includes the following steps:

[0068] 30 g of sunflower seeds and 0.1 M NaHCO3 (pH = 9) were soaked in a refrigerator at a mass ratio of 1:5 in a 4°C refrigerator for 12 h to obtain mixture A; 0.1 M NaHCO3 was added, and the mass ratio of the sum of the mass of 0.1 M NaHCO3 solution and mixture A to the mass of the initial sunflower seeds was 6:1 to obtain mixture B; mixture B was placed in a beater for beating, and the beating was carried out at room temperature for 4.5 min until there were no obvious sunflower seed particles in the slurry to obtain solution C; solution C was placed in a digital water bath constant temperature oscillator for water bath heating, the temperature was maintained at 50°C, and the water bath was heated for 1 h to obtain solution D; solution D was placed in a centrifuge, the centrifugal speed was 5000 rpm / min, the centrifugal time was 15 min, the centrifugal number was 2, and the sunflower seed oil body after centrifugation was carefully removed.

[0069] Comparative Example 6

[0070] This comparative example relates to a specific method for extracting sunflower seed oil bodies, which specifically includes the following steps:

[0071] 30 g of sunflower seeds and 0.1 M NaHCO3 (pH = 9) were soaked in a refrigerator at a mass ratio of 1:5 in a 4°C refrigerator for 12 h to obtain mixture A; mixture A was filtered to obtain pretreated sunflower seeds, 0.1 M NaHCO3 was added, and the mass ratio of the total mass of the NaHCO3 solution and the pretreated sunflower seeds to the initial sunflower seeds was 6:1 to obtain mixture B; mixture B was placed in a beater for beating, and the beating was carried out at room temperature for 4.5 min until there were no obvious sunflower seed particles in the slurry to obtain solution C; solution C was placed in a digital water bath constant temperature oscillator for water bath heating, the temperature was maintained at 50°C, and the water bath was heated for 1 h to obtain solution D; solution D was placed in a centrifuge, the centrifugal speed was 5000 rpm / min, the centrifugal time was 15 min, the centrifugal number was 2, and the sunflower seed oil body after centrifugation was carefully removed.

[0072] Example 2 - Determination of sunflower oil appearance and color

[0073] This example is based on the determination of sunflower seed oil bodies extracted from Example 1 and Comparative Examples 1 to 6, and specifically includes the following steps:

[0074] The sunflower oil bodies extracted in Example 1 and Comparative Examples 1 to 6 were respectively placed into a wishing bottle with a spoon, and then the appearance of the oil bodies under different extraction methods was photographed using a mobile phone, as shown in FIG. Figure 1 As shown, wherein, 1: Example 1; 2: Comparative Example 1; 3: Comparative Example 2; 4: Comparative Example 3; 5: Comparative Example 4; 6: Comparative Example 5; 7: Comparative Example 6.

[0075] The color of the oil bodies was measured using a colorimeter. The oil bodies extracted using different extraction methods were first spread onto a Petri dish. The color of the oil bodies was then measured using a calibrated colorimeter. The data were recorded, as shown in Table 1.

[0076] Table 1 Color determination results of sunflower oil bodies obtained by different extraction methods

[0077]

[0078] Note: Different letters indicate statistical significance

[0079] Generally, L* represents the brightness of sunflower oil bodies extracted by different extraction methods. According to Table 1, although there are differences in the brightness of sunflower oil bodies extracted by different extraction methods, the brightness values of the oil bodies extracted by different extraction methods are very close. A positive a* value of the sample represents a red sample, and a negative a* value represents a green sample. The a* values of Example 1 and Comparative Examples 1, 2, and 4 are positive, while the a* values of Comparative Examples 3, 5, and 6 are negative, which is consistent with the above. Figure 1The oil bodies extracted from Comparative Examples 3, 5 and 6 showed obvious green color, which is consistent with the results. A positive b* value of the sample represents a yellow sample, and a negative b* value represents a blue sample. According to Table 1, the b* values of the oil bodies extracted from Example 1 and Comparative Examples 1, 2, 3, 4, 5 and 6 are all positive, and they appear yellow. According to Table 1 and Figure 1 It can be seen that the oil bodies extracted in Comparative Examples 3, 5, and 6 exhibit a distinct green color, which is unfavorable for the preparation of mayonnaise, yogurt, and delivery of active ingredients. In contrast, the oil bodies extracted in Example 1, Comparative Examples 1, 2, and 4 have a lighter color, which is favorable for application in the food industry. However, the specific application of oil bodies in the food industry is not only related to color but also to oil body stability.

[0080] Example 3 - Determination of Sunflower Seed Oil Body Particle Size

[0081] This example is based on the sunflower seed oil bodies extracted in Example 1 and Comparative Examples 1 to 6, and is used to conduct tests to explore the stability of the sunflower seed oil bodies.

[0082] The specific steps include:

[0083] First, the sunflower seed oil bodies extracted in Example 1 and Comparative Examples 1 to 6 were diluted to 10 times, and then the BT-9300S particle size analyzer was cleaned and the refractive index was set to 1.46. Finally, the oil body emulsion was added dropwise to the sampling cell with a rubber dropper. When the shading rate reached 7-9%, the particle size data was collected. The results are shown as follows: Figure 2 shown.

[0084] according to Figure 2 It can be seen that the particle sizes of the sunflower seed oil bodies extracted in Example 1, Comparative Example 3, Comparative Example 5, and Comparative Example 6 were 2.07 μm, 2.07 μm, 1.51 μm, and 1.7 μm, respectively. This indicates that the oil bodies obtained by either soaking in NaHCO3 or using it as the extraction medium have good stability. This is because NaHCO3 keeps the oil bodies away from the isoelectric point of the oil body protein during extraction, generating electrostatic repulsion on the surface of the oil bodies and preventing the aggregation of the oil bodies. However, since NaHCO3 is used as the extraction medium in Comparative Examples 3, Comparative Examples 5, and Comparative Examples 6, the oil bodies have a darker color, which is not conducive to the subsequent utilization of the oil bodies.

[0085] Example 4 - Determination of sunflower seed oil body potential

[0086] This example is based on the sunflower seed oil bodies extracted in Example 1 and Comparative Examples 1 to 6, and is used to conduct tests to explore the stability of the sunflower seed oil bodies.

[0087] The specific steps include:

[0088] First, the sunflower seed oil bodies extracted in Example 1 and Comparative Examples 1 to 6 were diluted to 100 times, and then the particle size potential analyzer was cleaned and the instrument parameters were set. The equilibrium time was set to 60 seconds, the temperature was set to 25°C, and the refractive indexes of the dispersed phase and the continuous phase were set to 1.47 and 1.33. Finally, the oil body potential data were measured and collected. The results are as follows: Figure 3 shown.

[0089] according to Figure 3 It can be seen that the absolute values of the sunflower seed oil body potentials obtained by extraction in Example 1, Comparative Example 3, Comparative Example 5, and Comparative Example 6 are relatively large, which is consistent with the previous particle size data. This shows that the oil bodies obtained by either soaking in NaHCO3 or using it as the extraction medium have good stability, but soaking in NaHCO3 alone can make the oil bodies lighter in color.

[0090] In summary, the sunflower seed oil body extraction method of the present invention utilizes 0.1M NaHCO3 (pH = 9) soaking at a constant temperature for 10-14 hours followed by filtration. 0.1M NaCl is then added, the mixture is slurried, heated in a water bath, and centrifuged to produce sunflower seed oil bodies. The sunflower seed oil bodies obtained by combined extraction with NaHCO3 and NaCl not only exhibit good color and physical stability, but also feature a simple and environmentally friendly extraction method. This effectively addresses the dark color and insufficient stability issues associated with the production of sunflower seed oil bodies in existing techniques, expands the application of sunflower seed oil in natural emulsifiers, oleogels, and for the delivery of active ingredients, and possesses significant application value.

[0091] The above description is only a preferred embodiment of the present invention and does not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for extracting sunflower seed oil bodies, characterized in that: The following steps are involved: S1. soaking the initial sunflower seeds in a 0.05-0.15 M NaHCO3 solution and filtering to obtain pretreated sunflower seeds; S2. adding 0.05-0.15 M NaCl solution to the pretreated sunflower seeds to obtain a mixture; S3. Beat the mixture obtained in step S2, heat it in a water bath, and centrifuge to obtain the upper layer to obtain sunflower seed oil bodies.

2. The extraction method according to claim 1, wherein The mass ratio of the NaHCO3 solution to the initial sunflower seeds in step S1 is 4-6:0.5-1.

5.

3. The extraction method according to claim 1, wherein The pH of the NaHCO3 solution in step S1 is 8-10.

4. The extraction method according to claim 1, wherein The soaking in step S1 is performed at a constant temperature of 3 to 5° C. for 10 to 14 hours. 5 . The extraction method according to claim 1 , wherein in step S2 , the mass ratio of the mixture to the initial sunflower seeds is 6-8:1-2.

6. The extraction method according to claim 1, characterized in that The beating in step S3 is performed at room temperature for 3 to 6 minutes until there are no obvious sunflower seed particles in the slurry.

7. The extraction method according to claim 1, characterized in that The water bath heating in step S3 is heating at 40-60° C. in a constant temperature oscillator for 0.6-1.3 h.

8. The extraction method according to claim 1, characterized in that The centrifugation in step S3 is performed at 4000-6000 rpm / min for 10-20 min, with the centrifugation being performed 1-2 times.

9. Sunflower seed oil bodies extracted by the extraction method according to any one of claims 1 to 8, characterized in that: The sunflower seed oil body has a light color, wherein a*>0 when the color of the oil body is measured by a colorimeter, and the particle size of the sunflower seed oil body is 1.51 μm to 2.07 μm.

10. An extraction method according to any one of claims 1 to 8 or a use of the sunflower seed oil body according to claim 9, characterized in that: The application includes at least one of the following applications: application in preparing sunflower oil bodies, application in preparing sunflower oil, and application in food processing.

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