CN113396993A - Preservation method for effectively inhibiting oxidative rancidity of peony seed oil - Google Patents
Preservation method for effectively inhibiting oxidative rancidity of peony seed oil Download PDFInfo
- Publication number
- CN113396993A CN113396993A CN202110779655.3A CN202110779655A CN113396993A CN 113396993 A CN113396993 A CN 113396993A CN 202110779655 A CN202110779655 A CN 202110779655A CN 113396993 A CN113396993 A CN 113396993A
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- CN
- China
- Prior art keywords
- seed oil
- peony seed
- active composite
- preservation method
- oxidative rancidity
- Prior art date
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- Granted
Links
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Images
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- A23P—SHAPING OR WORKING OF FOODSTUFFS, NOT FULLY COVERED BY A SINGLE OTHER SUBCLASS
- A23P10/00—Shaping or working of foodstuffs characterised by the products
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Abstract
The invention relates to a preservation method for effectively inhibiting oxidative rancidity of peony seed oil, and belongs to the field of oil processing. The active composite peony seed oil product is prepared by taking peony seed oil as a core material, adding an emulsifier in a specific proportion, emulsifying the peony seed oil by using a high-speed shearing machine, adding an active composite material solution in a specific proportion, pre-emulsifying the active composite material solution by using a high-speed shearing machine, preparing a uniform and stable emulsion through high-pressure homogenization, and performing spray drying, wherein the embedding rate is 82.4-93.6%, and the shelf life is 31-35 months. The raw materials for preparing the active composite peony seed oil product are easy to obtain, the cost is low, and the preparation process is simple; not only is green and environment-friendly, but also is beneficial to the health of eaters; the whole preparation process keeps the functional activity of the peony seed oil to the maximum extent and prolongs the shelf life of the peony seed oil.
Description
Technical Field
The invention relates to the technical field of stability processing of peony seed oil, and particularly relates to a preservation method for effectively inhibiting oxidative rancidity of peony seed oil.
Background
The information in this background section is only for enhancement of understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art that is already known to a person of ordinary skill in the art.
The peony seed oil as a new resource food contains more than 90% of unsaturated fatty acid, mainly comprises alpha-linolenic acid, linoleic acid, oleic acid, palmitic acid and stearic acid, wherein the content of the alpha-linolenic acid is more than 40%, and the alpha-linolenic acid is an essential amino acid which can not be synthesized by a human body, and is beneficial to improving the immunity of the human body, protecting the eyesight, improving the memory, preventing cardiovascular and cerebrovascular diseases and the like. In 1993, the world health organization and the food and agriculture organization of the united nations published a document advocated the supplementation of alpha-linolenic acid nationwide, and some countries regulated the addition of alpha-linolenic acid or other derivatives to a given food product. Meanwhile, the peony seed oil also contains various nutrient components beneficial to the human body, such as vitamin E, phytosterol, squalene, trace elements and the like, and has outstanding effects on oxidation resistance, liver protection, blood fat reduction, blood sugar reduction, sun protection and the like. The peony seed oil has extremely high nutritional value and no acute, chronic or genetic toxicity, and is called as the best oil in the world by nutriologists. Therefore, the peony seed oil is a pure natural plant oil with great development potential.
At present, the peony seed oil is mainly packaged in a barrel (plastic barrel) and a bottle (glass bottle), the barrel and the bottle are not favorable for storage and transportation, the oxidation of the peony seed oil can be accelerated by illumination, and chemical substances such as peroxide, hydroxide, aldehyde, ketone, low molecular fatty acid, trans-fatty acid and the like are generated, so that the loss of nutritional ingredients of the peony seed oil is caused, and the human health is also greatly damaged. Although the peony seed oil is filled with nitrogen in the bottled form, the peony seed oil is protected by filling nitrogen, and the quality guarantee period is prolonged, the method is suitable for trace glass bottles, the packaging amount and the eating time are limited, and the glass bottles are fragile and are not favorable for transportation.
The active composite embedding technology is a novel food processing technology which combines the emulsification of core materials (additives, grease, nutrient substances and the like) and an emulsifier and then wraps the core materials by using a proper active composite material to obtain an active composite product. At present, the active composite embedding technology is more mature through continuous improvement of processes, equipment and materials, and has certain application in food. However, the inventor finds that: the embedding process of the peony seed oil still needs to be improved so as to better meet the commercialization requirement of the peony seed oil.
Disclosure of Invention
In order to overcome the problems, the invention provides a preservation method for effectively inhibiting oxidative rancidity of peony seed oil, wherein the active composite peony seed oil product prepared by the method has an embedding rate of 82.4-93.6% and a shelf life of 31-35 months.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
in a first aspect of the invention, a preservation method for effectively inhibiting oxidative rancidity of peony seed oil is provided, which comprises the following steps:
dispersing an active composite material in a solvent to form an active composite material solution;
compounding various emulsifiers to obtain a composite emulsifier with a hydrophilic-hydrophobic balance value of 9.5-11.5;
mixing and emulsifying peony seed oil and the compound emulsifier to form peony seed oil emulsion;
adding the active composite material solution into the peony seed oil emulsion, pre-emulsifying, and homogenizing under high pressure to form an emulsion;
and (3) carrying out spray drying on the emulsion to obtain an active composite peony seed oil product.
The research shows that: different core products have different molecular structures, physicochemical characteristics, product quality characteristics and the like, so the types and preparation parameters of the emulsifiers, embedding materials and proportions, embedding process parameters and flows and the like required by the active composite embedding have great differences. The invention finally obtains a preservation method for effectively inhibiting the oxidative rancidity of the peony seed oil and a high-quality active composite peony seed oil product by solving the technical problems of evaluation of emulsifier parameters, screening and proportioning optimization of embedding materials, optimization of an active composite embedding preparation process, quality characteristic parameters of the product, oxidative rancidity parameters and the like.
In a second aspect of the invention, the active composite peony seed oil product prepared by the method is provided.
According to the invention, the peony seed oil is embedded by using an active compound embedding technology, so that the nutrient substances of the peony seed oil are protected, the storage stability of the peony seed oil is increased, the shelf life of the peony seed oil is prolonged, and the application range of the peony seed oil in the field of food is widened.
In a third aspect of the invention, the application of the active compound peony seed oil product in the field of food is provided.
The invention has the beneficial effects that:
(1) according to the invention, the peony seed oil is embedded by using the active composite material, and on the basis of high embedding rate, the active composite packaging technology can effectively inhibit oxidation rancidity of the peony seed oil in the processes of processing, transporting and storing, increase the stability of the product and prolong the quality guarantee period of the product. The loss of nutrition and active health-care ingredients of the peony seed oil is reduced, the special taste and flavor of the peony seed oil are retained, and the peony seed oil is green, environment-friendly, safe and reliable.
(2) The active composite embedding material such as protein, polysaccharide and the like used by the invention not only has rich nutrient substances, but also contains small molecular active substances such as polypeptide, oligosaccharide, saponin and the like, which have good biological activities of reducing blood fat and blood sugar, resisting oxidation, repairing tissue cells, regulating physiological functions and the like, and has good protection and regulation effects on the health of human bodies, particularly the old.
(3) Compared with bottled peony seed oil, the active composite peony seed oil product has low cohesiveness and good fluidity, is solid powder with uniform particle size, is more convenient to package, store and transport, has good solubility, recoverability and stability, and can be added into corresponding food according to different target products, so that the application range of the peony seed oil in the fields of food, health products, cosmetics and the like is widened.
(4) The operation method is simple, low in cost, universal and easy for large-scale production.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
FIG. 1 shows the change of peroxide value of 18d (60 ℃) in the storage of peony seed oil and active compound peony seed oil products.
FIG. 2 shows the change of thiobarbituric acid value of 18d (60 ℃) in the storage of the peony seed oil and the active compound peony seed oil product.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
The invention provides a preservation method for effectively inhibiting oxidative rancidity of peony seed oil, wherein a core material of a raw material is the peony seed oil, an active composite material is beta-cyclodextrin, maltodextrin, soybean protein isolate, Arabic gum, gelatin and guar gum, and an emulsifier is soybean lecithin, span-80, Tween-80, fatty glyceride and sodium caseinate.
Beta-cyclodextrin is used as a coating material which is most commonly used in the process of cyclodextrin encapsulation, but because the inner cavity of the beta-cyclodextrin is hydrophobic and the outer surface of the beta-cyclodextrin is hydrophilic, the capsule wall of the product has good air permeability and oxygen permeability, and the stability of the product is poor; the maltodextrin is rich in polysaccharide and other substances, has the characteristics of difficult moisture absorption, good stability and difficult deterioration, and can promote the metabolism of a human body; the gelatin contains 18 kinds of amino acids required by human body, and active amino, hydroxyl and sulfhydryl groups exist in polypeptide chain, so that the gelatin has strong hydrophilicity; the Arabic gum and the guar gum have good film forming property; the soybean protein isolate is rich in protein and contains essential amino acids required by human body, so that the surface tension of water and oil can be reduced; the research finds that: if the two composite materials are combined, not only is the emulsion rich in nutrition contained, but also the stability of the emulsion is improved, and a capsule wall with good compactness is formed. On the other hand, the soybean lecithin is rich in nutrition, and the phosphatidylcholine contained in the soybean lecithin has a good physiological regulation effect. Tween-80 is a commonly used oil-in-water emulsifier; span-80 is a high-grade lipophilic food emulsifier; the fatty glyceride has good emulsification and antioxidation effects; the sodium caseinate contains various amino acids required by human bodies, and has high nutritive value; the research finds that: the adoption of the materials as the emulsifier is beneficial to the coating of the peony seed oil by the composite materials, so that the stability of the emulsion and the active composite peony seed oil product is improved, and the product has a longer quality guarantee period.
The preferable mixture ratio is as follows: the mass ratio of the active composite material to the core material is 5: 1-1: 1; one or more active composite materials are selected, and the mass ratio of the active composite materials is 5: 1-1: 5; one or more emulsifiers are selected, and the complex hydrophilic-hydrophobic balance value of the emulsifiers ranges from 9.5 to 11.5 and accounts for 1 to 3 percent of the total mass of the raw materials.
The second aspect of the invention provides a preservation method for inhibiting oxidative rancidity of peony seed oil, which comprises the following specific steps:
(1) mixing the active composite material and distilled water according to the mass ratio of 1: 5-1: 10, heating, stirring and dissolving to obtain an active composite material solution;
(2) the complex hydrophilic-hydrophobic balance value of different emulsifiers is 9.5-11.5, the peony seed oil and the complex emulsifier (accounting for 1.0-3.0% of the total mass of the raw materials) are emulsified, and the peony seed oil emulsion is formed by high-speed stirring for 5-10 min at the speed of 6000-10000 r/min by a high-speed shearer;
(3) slowly adding the active composite material solution into the peony seed oil emulsion, simultaneously stirring at a high speed of 10000-15000 r/min by a high-speed shearer for 10-30 min for pre-emulsification, and then emulsifying and homogenizing under 20MPa by a high-pressure homogenizer to form stable emulsion;
(4) and (3) selecting an inlet temperature of 170-180 ℃ and a sample flow rate of 10mL/min, and performing spray drying to obtain an active composite peony seed oil product (the ratio of the active composite material to the peony seed oil is 5: 1-1: 1).
The emulsion of the invention belongs to an oil-in-water type, the hydrophilic-hydrophobic balance value of the oil-in-water type is between 8 and 18, the hydrophilic-hydrophobic balance value of the compound emulsifier is between 9.5 and 11.5 through optimization selection, an ideal emulsifier not only has strong affinity with an oil phase, but also has strong affinity with a water phase, the emulsifier with small hydrophilic-hydrophobic balance value is mixed with the emulsifier with large hydrophilic-hydrophobic balance value for use, and the formed mixed membrane has strong affinity with the oil phase and the water phase, and researches also find that: the emulsion prepared in the interval of 9.5-11.5 has better stability, and the prepared active composite peony seed oil product has longer quality guarantee period.
The present invention is described in further detail below with reference to specific examples, which are intended to be illustrative of the invention and not limiting.
Example 1
In the embodiment of the invention, the raw materials for preparing the preservation method for inhibiting oxidative rancidity of peony seed oil comprise: peony seed oil, maltodextrin, gelatin, fatty glyceride and sodium caseinate.
The preservation method for inhibiting oxidative rancidity of peony seed oil comprises the following specific steps:
(1) compounding maltodextrin and gelatin according to the proportion of 1:2, mixing the maltodextrin, the gelatin and distilled water according to the proportion of 1:6, and carrying out water bath at 55 ℃ until the active composite material is completely dissolved to obtain an active composite material solution;
(2) compounding fatty glyceride and sodium caseinate according to a certain proportion to enable a hydrophilic-hydrophobic balance value to reach 10.5, emulsifying peony seed oil and an emulsifier (accounting for 1.5 percent of the total mass of the raw materials) obtained by compounding, and stirring at a high speed of 6000r/min for three times by using a high-speed shearer to form uniform peony seed oil emulsion every 5 min;
(3) slowly adding the active composite material solution into the peony seed oil emulsion, stirring at a high speed of 10000r/min for three times by a high-speed shearer, stirring for 10min each time for pre-emulsification, and then emulsifying and homogenizing under 20MPa by a high-pressure homogenizer to form stable emulsion;
(4) spray drying (inlet temperature is 170 ℃, flow rate is 10mL/min) to obtain active composite peony seed oil product (the ratio of active composite material to peony seed oil is 5: 3).
The embedding rate of the active composite peony seed oil product prepared by the method is 86.7 percent, and the particle size d43It was 2.60 μm.
Example 2
In the embodiment of the invention, the raw materials for preparing the preservation method for inhibiting oxidative rancidity of peony seed oil comprise: peony seed oil, beta-cyclodextrin, Arabic gum, Tween-80 and span-80.
The preservation method for inhibiting oxidative rancidity of peony seed oil comprises the following specific steps:
(1) compounding beta-cyclodextrin and Arabic gum in a ratio of 1:3, mixing the beta-cyclodextrin, the Arabic gum and distilled water in a ratio of 1:8, and carrying out water bath at 55 ℃ until the active composite material is completely dissolved to obtain an active composite material solution;
(2) compounding tween-80 and span-80 according to a certain proportion to enable the hydrophilic-hydrophobic balance value to reach 10.5, emulsifying peony seed oil and an emulsifier (accounting for 2.0 percent of the total mass of the raw materials) obtained by compounding, and stirring at a high speed of 8000r/min for three times by using a high-speed shearer for 5min each time to form uniform peony seed oil emulsion;
(3) slowly adding the active composite material solution into the peony seed oil emulsion, stirring for three times at a high speed of 11000r/min by using a high-speed shearer, stirring for 10min each time for pre-emulsification, and then emulsifying and homogenizing under 20MPa by using a high-pressure homogenizer to form stable emulsion;
(4) spray drying (inlet temperature is 170 ℃, flow rate is 10mL/min) to obtain active composite peony seed oil product (the ratio of active composite material to peony seed oil is 5: 2).
The embedding rate of the active composite peony seed oil product prepared by the method is 90.9 percent, and the particle size d43It was 2.27 μm.
Example 3
In the embodiment of the invention, the raw materials for preparing the preservation method for inhibiting oxidative rancidity of peony seed oil comprise: peony seed oil, beta-cyclodextrin, soybean protein isolate and soybean lecithin.
The preservation method for inhibiting oxidative rancidity of peony seed oil comprises the following specific steps:
(1) compounding beta-cyclodextrin and soybean protein isolate according to the proportion of 1:3, mixing the beta-cyclodextrin, the soybean protein isolate and distilled water according to the proportion of 1:7, carrying out water bath at 45 ℃ until the active composite material is completely dissolved, and filtering to obtain an active composite material solution;
(2) emulsifying peony seed oil and soybean lecithin (accounting for 2.0% of the total mass of the raw materials), and stirring at a high speed of 10000r/min for three times by using a high-speed shearer, wherein a uniform peony seed oil emulsion is formed after 5min each time;
(3) slowly adding the active composite material solution into the peony seed oil emulsion, stirring at a high speed of 10000r/min for three times by a high-speed shearer, stirring for 10min each time for pre-emulsification, and then emulsifying and homogenizing under 20MPa by a high-pressure homogenizer to form stable emulsion;
(4) spray drying (inlet temperature is 170 ℃, flow rate is 10mL/min) to obtain active composite peony seed oil product (the ratio of active composite material to peony seed oil is 5: 3).
The embedding rate of the active composite peony seed oil product prepared by the method is 84.5 percent, and the particle size d43It was 3.21. mu.m.
Example 4
In the embodiment of the invention, the raw materials for preparing the preservation method for inhibiting oxidative rancidity of peony seed oil comprise: peony seed oil, beta-cyclodextrin, gelatin, tween-80 and span-80.
The preservation method for inhibiting oxidative rancidity of peony seed oil comprises the following specific steps:
(1) compounding beta-cyclodextrin and gelatin according to the proportion of 1:3, mixing the beta-cyclodextrin, the gelatin and distilled water according to the proportion of 1:9, and carrying out water bath at 60 ℃ until the active composite material is completely dissolved to obtain an active composite material solution;
(2) compounding tween-80 and span-80 according to a certain proportion to enable the hydrophilic-hydrophobic balance value to reach 10.5, emulsifying peony seed oil and an emulsifier (accounting for 2.0 percent of the total mass of the raw materials) obtained by compounding, and stirring at a high speed of 10000r/min for three times by a high-speed shearer for 5min each time to form uniform peony seed oil emulsion;
(3) slowly adding the active composite material solution into the peony seed oil emulsion, stirring at a high speed of 10000r/min for three times by a high-speed shearer, stirring for 10min each time for pre-emulsification, and then emulsifying and homogenizing under 20MPa by a high-pressure homogenizer to form stable emulsion;
(4) spray drying (inlet temperature is 170 ℃, flow rate is 10mL/min) to obtain active composite peony seed oil product (the ratio of active composite material to peony seed oil is 5: 3).
The embedding rate of the active composite peony seed oil product prepared by the method is 93.6%, and the particle size d43Is 2.02 mum。
Example 5
In the embodiment of the invention, the raw materials for preparing the preservation method for inhibiting oxidative rancidity of peony seed oil comprise: peony seed oil, maltodextrin, guar gum and soybean lecithin.
The preservation method for inhibiting oxidative rancidity of peony seed oil comprises the following specific steps:
(1) compounding maltodextrin and guar gum according to the proportion of 1:3, mixing the maltodextrin, the guar gum and distilled water according to the proportion of 1:7, and carrying out water bath at 60 ℃ until the active composite material is completely dissolved to obtain an active composite material solution;
(2) emulsifying peony seed oil and soybean lecithin (accounting for 2.0% of the total mass of the raw materials), and stirring at a high speed of 10000r/min for three times by using a high-speed shearer, wherein a uniform peony seed oil emulsion is formed after 5min each time;
(3) slowly adding the active composite material solution into the peony seed oil emulsion, stirring at a high speed of 10000r/min for three times by a high-speed shearer, stirring for 10min each time for pre-emulsification, and then emulsifying and homogenizing under 20MPa by a high-pressure homogenizer to form stable emulsion;
(4) spray drying (inlet temperature is 170 ℃, flow rate is 10mL/min) to obtain active composite peony seed oil product (the ratio of active composite material to peony seed oil is 5: 3).
The embedding rate of the active composite peony seed oil product prepared by the method is 88.6 percent, and the particle size d43It was 2.46 μm.
Example 6
In the embodiment of the invention, the raw materials for preparing the preservation method for inhibiting oxidative rancidity of peony seed oil comprise: peony seed oil, maltodextrin, soybean protein isolate, fatty glyceride and sodium caseinate.
The preservation method for inhibiting oxidative rancidity of peony seed oil comprises the following specific steps:
(1) compounding maltodextrin and soybean protein isolate according to the proportion of 1:3, mixing the maltodextrin, the soybean protein isolate and distilled water according to the proportion of 1:7, and carrying out water bath at 60 ℃ until the active composite material is completely dissolved to obtain an active composite material solution;
(2) compounding fatty glyceride and sodium caseinate according to a certain proportion to enable a hydrophilic-hydrophobic balance value to reach 10.5, emulsifying peony seed oil and an emulsifier (accounting for 2.0% of the total mass of the raw materials) obtained by compounding, and stirring at a high speed of 10000r/min for three times by using a high-speed shearer, wherein a uniform peony seed oil emulsion is formed after 5min each time;
(3) slowly adding the active composite material solution into the peony seed oil emulsion, stirring at a high speed of 10000r/min for three times by a high-speed shearer, stirring for 10min each time for pre-emulsification, and then emulsifying and homogenizing under 20MPa by a high-pressure homogenizer to form stable emulsion;
(4) spray drying (inlet temperature is 170 ℃, flow rate is 10mL/min) to obtain active composite peony seed oil product (the ratio of active composite material to peony seed oil is 5: 3).
The embedding rate of the active composite peony seed oil product prepared by the method is 82.4%, and the particle size d43And 3.46 μm.
Description of the index
(1) The formula for calculating the embedding rate of the active composite peony seed oil product is as follows:
(2) particle size (average volume diameter d) of active composite peony seed oil product43)：
In the formula, niIs the number of particles, diIs the average particle diameter.
(3) Hydrophilic-hydrophobic balance (HLB) of the active composite peony seed oil product:
in the formula, M1And M2Representing emulsifiers 1 and 2, respectivelyQuality; HLB1And HLB2Represent the HLB values of emulsifier 1 and emulsifier 2, respectively.
Experimental example 1 determination of peroxide value of active composite peony seed oil product during storage
The peony seed oil and the active compound peony seed oil product are stored in an air-blast drying oven at 60 ℃ for 18 days, and the peroxide value of the sample is determined every 3 days. The degree of oxidation during storage was determined by measuring the hydrogen peroxide value. The hydroperoxide is extracted by breaking the emulsion and then measured. 3g of active composite peony seed oil product is weighed, and 30mL of chloroform-glacial acetic acid (2:3, V/V) mixed solution is added to destroy the capsule wall of the active composite peony seed oil product, so that the peony seed oil is dissolved in the mixed solution. Adding 1mL of potassium iodide saturated solution into the mixed solution containing peony seed oil, uniformly mixing for 0.5min, standing in the dark for 3min, filtering, taking the supernatant, and adding 100mL of distilled water. After mixing uniformly, 1mL of starch indicator (1%) is added, and titration is performed again with sodium thiosulfate titration solution, so that the blue color of the solution disappears, namely the titration end point. The blank test needs to be performed simultaneously. Peroxide values are expressed as milliequivalents of hydrogen peroxide per kilogram of oil (meq), according to equation (1), to assess the degree of oxidation of the peony seed oil.
In the formula, V0Volume of sodium thiosulfate standard solution (mL), V, consumed for blank test1The volume (mL) of a sodium thiosulfate standard solution consumed for an active compound peony seed oil product sample, c is the concentration of the sodium thiosulfate standard solution, m is the sample mass (g), and 1000 is a conversion coefficient.
As shown in the graph 1, the peroxide values of the peony seed oil and the examples 1-6 are increased with the increase of the storage time, but the peroxide value of the peony seed oil is higher than that of the examples 1-6, the embedding rate of the example 4 is the highest, and the peroxide value is the lowest, which shows that the active compound peony seed oil product prepared by taking the beta-cyclodextrin and the gelatin as the compound active compound material has good storage stability.
Experimental example 2 determination of thiobarbituric acid value of active composite peony seed oil product in storage process
And (3) placing the peony seed oil and the active compound peony seed oil product in an air drying oven at 60 ℃ for 18 days, and measuring the change of the thiobarbituric acid value of the sample every 3 days. Since the thiobarbituric acid number of polyunsaturated oils is closely related to other secondary reaction product markers of fat oxidation (e.g., hexanal and propylene), the thiobarbituric acid method was used to evaluate the secondary reaction products of fat oxidation. Taking 2g of the active compound peony seed oil product, adding 15mL of trichloroacetic acid solution (10g/L), uniformly mixing, standing at room temperature for 15min, and centrifuging at the speed of 3000 Xg for 15 min. Taking 5mL of the supernatant, adding 5mL of thiobarbituric acid solution, incubating in boiling water bath for 15min, cooling to room temperature, and measuring absorbance at 532nm with an ultraviolet spectrophotometer. The concentration of 1,1,3, 3-tetraethoxypropane (c, μ g/mL) of the sample is determined from the linear relationship of c to 1,1,3, 3-tetraethoxypropane. The thiobarbituric acid value is expressed as the content of 1,1,3, 3-tetraethoxypropane (MDA) per kg of oil (mg), and the thiobarbituric acid value in the sample is calculated according to equation (2):
in the formula, 220 is the molecular weight of 1,1,3, 3-tetraethoxypropane, 2 is the weight of the peony seed oil, 50 is the dilution coefficient, and 1000 is the conversion coefficient.
As shown in the figure 2, the acid values of the peony seed oil and the thiobarbituric acid of the examples 1 to 6 are increased with the increase of the storage time, but the acid value of the thiobarbituric acid of the peony seed oil is higher than that of the examples 1 to 6, the embedding rate of the example 4 is the highest, and the acid value of the thiobarbituric acid is the lowest, which indicates that the active compound peony seed oil product prepared by using the beta-cyclodextrin and the gelatin as the compound active compound material has good storage stability.
Experimental example 3 prediction of shelf life of active composite peony seed oil product
During storage, the oxidative rancidity of the oil in the active composite peony seed oil product follows a first-order reaction model:
B＝B0ekt (3)
in the formula: b represents the peroxidation value of the oil of the active compound peony seed oil product after t d storage; b is0Representing the initial peroxide value of the oil of the active compound peony seed oil product; t represents a storage time; k represents a rate of change constant.
Arrhenius equation (Arrhenius) equation:
K＝k0e-Ea/RT (4)
in the formula: ea represents activation energy (kJ/mol); k is a radical of0Represents a pre-pointing constant; t represents absolute temperature (K); r represents a gas constant [ R is 8.314J/(mol. K)]。
Taking logarithm at both sides of the formula (4) to obtain an equation lnK ═ lnK0E/RT, knowing that lnK has a linear relation with 1/T, lnK0Is the intercept and E/R is the slope. Storing the active compound peony seed oil product at 60 ℃ to obtain a K value, and fitting a straight line to obtain E and K0(ii) a And finally substituting the active compound peony seed oil into the original formula to obtain the predicted shelf life of the active compound peony seed oil product.
The results show that the shelf lives of the peony seed oil and the peony seed oil in examples 1-6 are respectively 13 months, 33 months, 34 months, 32 months, 35 months, 33.5 months and 31 months, and the shelf life of example 4 is the longest, so that beta-cyclodextrin and gelatin can be selected as active composite materials to embed the peony seed oil to prepare the active composite peony seed oil product.
It should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and the present invention is not limited thereto, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and equivalents can be made in the technical solutions described in the foregoing embodiments, or equivalents thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A preservation method for effectively inhibiting oxidative rancidity of peony seed oil is characterized by comprising the following steps:
dispersing an active composite material in a solvent to form an active composite material solution;
compounding various emulsifiers to obtain a composite emulsifier with a hydrophilic-hydrophobic balance value of 9.5-11.5;
mixing and emulsifying peony seed oil and the compound emulsifier to form peony seed oil emulsion;
adding the active composite material solution into the peony seed oil emulsion, pre-emulsifying, and homogenizing under high pressure to form an emulsion;
and (3) carrying out spray drying on the emulsion to obtain an active composite peony seed oil product.
2. A preservation method for effectively inhibiting oxidative rancidity of peony seed oil according to claim 1, wherein the active composite material is at least one of beta-cyclodextrin, maltodextrin, soy protein isolate, gum arabic, gelatin, guar gum.
3. A preservation method for effectively inhibiting oxidative rancidity of peony seed oil according to claim 1, wherein the emulsifier is at least one of soybean lecithin, span-80, tween-80, fatty glyceride and sodium caseinate.
4. A preservation method for effectively inhibiting oxidative rancidity of peony seed oil according to claim 1, wherein the mass ratio of the active composite material to the core material is 5: 1-1: 1.
5. A preservation method for effectively inhibiting oxidative rancidity of peony seed oil according to claim 1, wherein the composite emulsifier accounts for 1% -3% of the total mass of raw materials.
6. A preservation method for effectively inhibiting oxidative rancidity of peony seed oil according to claim 1, wherein emulsification is carried out under stirring at 10000-15000 r/min for 10-30 min.
7. A preservation method for effectively inhibiting oxidative rancidity of peony seed oil according to claim 1, wherein the pressure for high-pressure homogenization is 20-30 MPa.
8. A preservation method for effectively inhibiting oxidative rancidity of peony seed oil according to claim 1, wherein spray drying conditions are that an inlet temperature is 170-180 ℃ and a sample flow rate is 10-15 mL/min.
9. An active composite peony seed oil product produced by the method of any one of claims 1-8.
10. The use of the active composite peony seed oil product of claim 9 in the field of food.
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| CN114468298A (en) * | 2022-02-10 | 2022-05-13 | 山东四季园牡丹生物科技有限公司 | Peony seed oil microcapsule and preparation method thereof |
| CN116268410A (en) * | 2023-01-31 | 2023-06-23 | 江苏大学 | Peony seed oil double-layer emulsion and preparation method and application thereof |
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| CN105995978A (en) * | 2016-05-20 | 2016-10-12 | 福建师范大学 | Perilla oil composition and perilla oil microcapsule powder and preparation method thereof |
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| CN105995978A (en) * | 2016-05-20 | 2016-10-12 | 福建师范大学 | Perilla oil composition and perilla oil microcapsule powder and preparation method thereof |
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| CN114468298A (en) * | 2022-02-10 | 2022-05-13 | 山东四季园牡丹生物科技有限公司 | Peony seed oil microcapsule and preparation method thereof |
| CN116268410A (en) * | 2023-01-31 | 2023-06-23 | 江苏大学 | Peony seed oil double-layer emulsion and preparation method and application thereof |
| CN116268410B (en) * | 2023-01-31 | 2024-04-12 | 江苏大学 | Peony seed oil double-layer emulsion and preparation method and application thereof |
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