OIL AND FAT COMPOSITION

Abstract

The present invention addresses the problem of providing an edible oil and fat that is usable for any kind of food, has an improved oxidation stability, and exhibits a good flavor. By stably dispersing a tea extract together with an acid in an oil and fat, the oxidation stability can be improved without increasing the formulation amount of the tea extract.

Claims

1. An oil and fat composition comprising 50 ppm by mass to 1000 ppm by mass of a tea extract and 0.1 to 5 times as much acids as the tea extract.

2. The oil and fat composition according to claim 1, wherein an average particle size of an aqueous phase is 1000 nm or less.

3. The oil and fat composition according to claim 1, wherein 80 ppm by mass to 800 ppm by mass of the tea extract is contained.

4. A food product using the oil and fat composition according to claim 1.

5. A method for producing the oil and fat composition according to claim 1, comprising: preparing the oil and fat composition by mixing an oil phase and an aqueous phase, wherein the aqueous phase: an aqueous solution in which tea extract and acids are dissolved.

6. The method for producing the oil and fat composition according to claim 5, wherein 1 to 5 times as much water as the tea extract is contained in the aqueous phase.

7. A method for improving oxidation stability of an oil and fat composition, comprising: incorporating a tea extract and acids in an aqueous phase dispersed into the oil and fat composition when producing the oil and fat composition.

8. The oil and fat composition according to claim 2, wherein 80 ppm by mass to 800 ppm by mass of the tea extract is contained.

9. A food product using the oil and fat composition according to claim 2.

10. A food product using the oil and fat composition according to claim 3.

11. A food product using the oil and fat composition according to claim 8.

12. A method for producing the oil and fat composition according to claim 2, comprising: preparing the oil and fat composition by mixing an oil phase and an aqueous phase, wherein the aqueous phase: an aqueous solution in which tea extract and acids are dissolved.

13. A method for producing the oil and fat composition according to claim 3, comprising: preparing the oil and fat composition by mixing an oil phase and an aqueous phase, wherein the aqueous phase: an aqueous solution in which tea extract and acids are dissolved.

14. A method for producing the oil and fat composition according to claim 8, comprising: preparing the oil and fat composition by mixing an oil phase and an aqueous phase, wherein the aqueous phase: an aqueous solution in which tea extract and acids are dissolved.

15. The method for producing the oil and fat composition according to claim 12, wherein 1 to 5 times as much water as the tea extract is contained in the aqueous phase.

16. The method for producing the oil and fat composition according to claim 13, wherein 1 to 5 times as much water as the tea extract is contained in the aqueous phase.

17. The method for producing the oil and fat composition according to claim 14, wherein 1 to 5 times as much water as the tea extract is contained in the aqueous phase.

Description

DESCRIPTION OF EMBODIMENTS

[0024] Hereinafter, the present invention will be described in detail.

[0025] In the present invention, by incorporating the acids, the oxidation stability can be improved without increasing the formulation amount of the tea extract.

[0026] It is thought that the acids may have a stabilizing effect on the polyphenols contained in the tea extract.

[0027] An oil and fat composition according to the present invention contains 50 ppm by mass to 1000 ppm by mass of tea extract and 0.1 to 5 times as much acids as tea extract.

[0028] Examples of the tea extract include tea leaves such as green tea, oolong tea, and black tea, or extracts of processed products thereof, which are extracted with water, alcohol, or the like. It is preferable to use a green tea extract, and a commercially available green tea extract can be used.

[0029] As the acids, organic acids and/or inorganic acids can be used.

[0030] As the inorganic acid, phosphoric acids are preferably used, and examples thereof include orthophosphoric acid, diphosphoric acid (pyrophosphoric acid), and metaphosphoric acid.

[0031] The tea extract content of the oil and fat composition according to the present invention is preferably 80 ppm by mass to 800 ppm by mass, more preferably 100 ppm by mass to 600 ppm by mass, and still more preferably 150 ppm by mass to 400 ppm by mass. When the amount is extremely small, the effect of improving the oxidation stability cannot be obtained, and when the amount is extremely large, the effect on the flavor becomes large, which is not preferable.

[0032] The content of the acids according to the present invention is 0.1 to 5 times the amount of the tea extract. The content of acids is preferably 0.1 to 4 times, more preferably 0.1 to 3 times, still more preferably 0.12 to 3 times. When the formulation amount of the acid to be added to the tea extract is extremely small, the effect of improving the oxidation stability cannot be obtained, which is not preferable.

[0033] Examples of the fats and oils that can be used in the oil and fat composition according to the present invention include: vegetable fats and oils such as rapeseed oil, soybean oil, sunflower seed oil, cottonseed oil, peanut oil, rice bran oil, corn oil, safflower oil, olive oil, kapok oil, sesame oil, evening primrose oil, palm oil, palm kernel oil, coconut oil, medium chain triglycerides (MCT), shea butter, and sal butter; animal fats and oils such as milk fat, beef tallow, lard, fish oil, and whale oil; algae oil; modified fats and oils such as hydrogenated oils, fractionated oils, hydrogenated and fractionated oils, fractionated and hydrogenated oils, and ester-exchanged processed fats and oils of vegetable and animal fats and oils; and mixed oils and fats of these fats and oils. From the viewpoint of workability, it is preferable to use fats and oils that are liquid at room temperature, which are exemplified by palm olein, rapeseed oil, soybean oil, sunflower seed oil, and the like.

[0034] In the oil and fat composition according to the present invention, an oil-soluble emulsifier is preferably dissolved in the oil phase in order to maintain excellent dispersion stability. The oil-soluble emulsifier is an emulsifier that dissolves in fats and oils, and in the present invention, the oil-soluble emulsifier refers to an emulsifier having an HLB of 7 or less. As the oil-soluble emulsifier, one or more selected from polyglycerol ester, sugar ester, sorbitan ester, and monoglycerin fatty acid ester is preferable, polyglycerin ester, sugar ester, and distilled monoglyceride are more preferable, and polyglycerin ester is particularly preferable. Of these, polyglycerin condensed ricinoleic acid ester is most preferable. The polyglycerin condensed ricinoleic acid ester may be abbreviated as PGPR. The amount of the oil-soluble emulsifier in the oil phase is preferably 0.1 to 50 times the amount of the tea extract, more preferably 0.3 to 30 times the amount of the tea extract, and still more preferably 0.5 to 25 times the amount of the tea extract. By using an appropriate amount of an appropriate emulsifier, the dispersion stability of the tea extract can be improved and the function of the oil and fat composition containing tea extract can be exhibited. In a case where an excessive amount of emulsifier is used, when the oil and fat composition according to the present invention is used in a food product, the flavor derived from the emulsifier may deteriorate the taste and unintentionally inhibit emulsification, which may impair the quality of the food product.

[0035] The oil and fat composition according to the present invention is preferably adjusted such that the average particle size of the aqueous phase containing tea extract is 1000 nm or less. The average particle size is more preferably 500 nm or less, and still more preferably 300 nm or less. Adjusting the average particle size to 1000 nm or less is preferable because the tea extract can be stably dispersed. When the average particle size exceeds 1000 nm, the dispersion stability may deteriorate, which is not preferable. In the present invention, the average particle size is obtained by a dynamic light scattering method. Further, when the average particle size exceeds 1000 nm, it is difficult to perform analysis by the dynamic light scattering method, and thus the average particle size is obtained by a laser diffraction method.

[0036] A method for producing the oil and fat composition according to the present invention is not limited as long as the above-described oil and fat composition can be obtained, and a production method for preparing the oil and fat composition by mixing an aqueous solution, in which tea extract and acids are dissolved, into an oil phase can be exemplified. The tea extract and the acids do not need to be dissolved in the same aqueous solution.

[0037] As the method for producing the oil and fat composition according to the present invention, a production method for preparing the oil and fat composition by mixing the oil phase and the following aqueous phase can be exemplified.

[0038] Aqueous phase: Aqueous solution in which tea extract and acids are dissolved

[0039] As a preferred aspect of the aqueous solution in which the tea extract and the acids are dissolved, the aqueous phase contains 1 to 5 times as much water as the tea extract. The aqueous phase more preferably contains 1 to 4.5 times as much water as the tea extract, still more preferably 1 to 4 times as much water as the tea extract, and still more preferably 1 to 3 times as much water as the tea extract. Most preferably, the aqueous phase contains 1 to 2 times as much water as the tea extract.

[0040] A mixer and a stirring device can be used for mixing the oil phase and the aqueous phase, and the device is not particularly limited, but a device capable of preventing air from being mixed during mixing and stirring is preferable. A mixing emulsification device such as a high-pressure homogenizer can be exemplified.

[0041] Since the oil and fat composition according to the present invention contains tea extract and acids and has excellent dispersion stability, excellent oxidation stability can be obtained. The evaluation of the oil and fat composition according to the present invention can be performed by obtaining a determination index regarding the oxidation stability of fats and oils by a conductmetric determination method (CDM) test. The larger the measured value of CDM, the better the oxidation stability. The CDM test can be performed using a dedicated test device (Rancimat). Specific measuring methods will be described in Examples. Both are acceleration tests for performing tests at a higher temperature than that of expected usage.

[0042] Since the oil and fat composition according to the present invention can adjust the tea extract to a wide concentration range, the oil and fat composition can be used for all food products. Seasonings such as dressings and mayonnaise; taste-based fillings and spreads such as pizza sauce; margarine; shortening; cooked products such as retort curry; roux such as stew and curry; frozen food products such as fried food; cooked bread; processed meats such as sausage; kneaded products such as Hanpen; food products obtained by cooking using these; rice crackers such as fried rice cakes; snack food products such as potato chips, corn snacks, and pretzels; frozen desserts; ice cream mixes; and other sweets and Japanese confectionery to taste can be exemplified.

[0043] As a preferred aspect, rice crackers, corn snacks (coating oils), fillings and spreads, sauces, soups, beverages, cooked rice binding-suppressing fats and oils, and ice creams, which are less heated during production can be exemplified.

[0044] The oil and fat composition according to the present invention contains tea extract as an essential component, but other antioxidants may also be contained in combination as long as the effects of the present invention are not impaired. Examples of other antioxidants include oil-soluble tocopherols, Yamamomo extract, polyphenols derived from grape seeds, and water-soluble antioxidative substances such as ascorbic acid and derivatives thereof, gallic acid and derivatives thereof, and the antioxidants may be used in combination.

[0045] In addition to emulsifiers and antioxidants, any components such as colorants, antifoaming agents, and fragrances may be incorporated into the oil and fat composition according to the present invention as long as the effects of the present invention are not impaired. The formulation amount of any of the components is preferably 5% by mass or less in total, more preferably 3% by mass or less, and most preferably 1% by mass or less in the oil and fat composition according to the present invention.

EXAMPLES

[0046] Examples of the present invention will be described below, and the present invention will be described in more detail. In the example, both % and part mean units based on mass.

Test Example 1. to Test Example 2

[0047] (Preparation Method)

[0048] The oil phase part was prepared according to the incorporation described in each oil phase field of Table 1 and Table 2. Similarly, the aqueous phase part was prepared according to the incorporation described in each aqueous phase field of Table 1 and Table 2.

[0049] The oil phase part was set to 25° C., and the aqueous phase part was incorporated while stirring with a homomixer (TK homomixer MARKII: manufactured by Primix Corporation) at 8000 rpm. In this state, the mixture was stirred for 10 minutes to obtain each oil and fat composition.

[0050] (Used Raw Materials/Additives)

[0051] As fats and oils, “rapeseed white squeezed oil” or palm olein “Palm Ace N” manufactured by Fuji Oil Co., Ltd. was used.

[0052] For PGPR, polyglycerin condensed ricinoleic acid ester “CRS-75” manufactured by Sakamoto Yakuhin Kogyo Co., Ltd. was used.

[0053] A tea extract having a polyphenol content of 80% or more (manufactured by Taiyo Kagaku Co. Ltd., trade name: Sunphenon 90S) was used.

[0054] As acids, citric acid (anhydrous) manufactured by Fuso Chemical Co., Ltd., metaphosphoric acid lump (37%) manufactured by Wako Pure Chemical Industries, Ltd., and DL-malic acid manufactured by Wako Pure Chemical Industries, Ltd. were used.

[0055] (Evaluation Method)

[0056] Average Particle Size of Aqueous Phase:

[0057] The average particle size was obtained by the dynamic light scattering method. Further, those having a particle size exceeding 1000 nm were obtained by the laser diffraction method.

[0058] Oxidation Stability Evaluation of Oil and Fat Composition:

[0059] The CDM value was obtained and evaluated by the CDM test (Definition: Clean air is sent while heating the sample in a reaction vessel at 120° C. The time from collecting the volatile decomposition products generated by oxidation in water until reaching the inflection point where the conductivity of water changes rapidly), which is “Stability Test” of Standard Methods for the Analysis of Fats, Oils, and Related Materials (2.5.1.2-1996).

[0060] The rate of increase (%) in the CDM value was calculated for the acid-free group containing the same amount of tea extract and not containing acids, and the effects were compared (for example, in the case of Example 1, the rate of increase in the CDM value with respect to Comparative Example 3 containing the same amount of tea extract is calculated).

[0061] Those having an extension effect of 10% or more with respect to the CDM value containing the same amount of tea extract and not containing acids were regarded as acceptable.

[0062] Evaluation of Astringency and Unpleasant Taste of Oil and Fat Composition:

[0063] The fats and oils obtained in Examples and Comparative Examples were evaluated for flavor.

[0064] The flavor evaluation was performed by four skilled panelists, and the flavor evaluation score was determined by agreement. A case where the flavor evaluation score is 1 or more is determined to be acceptable.

[0065] 2 points: Astringency or unpleasant taste is not felt.

[0066] 1 point: The flavor is different from that of Comparative Example 1, but no clear astringency or unpleasant taste is felt.

[0067] 0 points: Astringency and unpleasant taste are felt.

Test Example 1

[0068] An oil and fat composition was prepared according to the incorporation described in Table 1 and (Preparation Method), and evaluated according to (Evaluation Method). The results are shown in Table 1.

TABLE-US-00001 TABLE 1 Incorporation of oil and fat Comparative Comparative Comparative Comparative Comparative composition Example 1 Example 2 Example 3 Example 4 Example 5 Oil Canola oil 100.000 99.8705 99.8675 99.8575 99.8500 phase Palm Ace N PGPR 0.0000 0.1200 0.1200 0.1200 0.1200 Aqueous Water 0.0000 0.0075 0.0075 0.0135 0.0180 phase Tea extract 0.0000 0.0020 0.0050 0.0090 0.0120 Citric acid 0.0 0.0 0.0 0.0 0.0 Incorporation — 0.0 0.0 0.0 0.0 ratio of acids with respire to tea extract Average particle — 286 308 293 294 size (nm) CDM(hr)@120° C. 5.6 6.5 7.4 8.4 9.3 Evaluation of 2 2 2 2 2 astringency or unpleasant taste Incorporation of oil and fat Comparative Comparative Comparative Comparative Comparative composition Example 6 Example 7 Example 8 Example 9 Example 10 Oil Canola oil 99.8350 99.7900 99.7450 99.7000 99.5800 phase Palm Ace N PGPR 0.1200 0.1200 0.1200 0.1200 0.1200 Aqueous Water 0.0270 0.0540 0.0810 0.1080 0.1800 phase Tea extract 0.0180 0.0360 0.0540 0.0720 0.1200 Citric acid 0.0 0.0 0.0 0.0 0.0 Incorporation 0.0 0.0 0.0 0.0 0.0 ratio of acids with respire to tea extract Average particle 283 304 277 290 286 size (nm) CDM(hr)@120° C. 10.4 13.7 16.7 18.3 19.4 Evaluation of 1 1 0 0 0 astringency or unpleasant taste Incorporation of oil and fat Comparative Comparative composition Example 16 Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Example 7 Example 17 Oil Canola oil 99.8693 99.8645 99.8525 99.8430 99.8250 99.7700 99.7150 99.6600 99.5130 phase Palm Ace N PGPR 0.1200 0.1200 0.1200 0.1200 0.1200 0.1200 0.1200 0.1200 0.1200 Aqueous Water 0.0075 0.0075 0.0135 0.0180 0.0270 0.0540 0.0810 0.1080 0.1800 phase Tea extract 0.0020 0.0050 0.0090 0.0120 0.0180 0.0360 0.0540 0.0720 0.1200 Citric acid 0.0012 0.0030 0.0050 0.0070 0.0100 0.0200 0.0300 0.0400 0.0670 Incorporation 0.60 0.60 0.56 0.58 0.56 0.56 0.56 0.56 0.56 ratio of acids with respire to tea extract Average particle 288 309 295 290 288 287 293 282 283 size (nm) CDM(hr)@120° C. 6.7 8.8 10.2 11.6 12.4 16.1 20.7 23.0 24.1 Rate of increase 3 19 21 25 19 18 24 26 24 (%) in CDM value with respect to acid-free group Evaluation of 2 2 2 2 2 2 1 1 0 astringency or unpleasant taste Incorporation of oil and Comparative Comparative Comparative Comparative Comparative fat composition Example 11 Example 12 Example 13 Example 14 Example 15 Oil Canola oil phase Palm Ace N 100.000 99.7900 99.7450 99.7000 99.5800 PGPR 0.0000 0.1200 0.1200 0.1200 0.1200 Aqueous Water 0.0000 0.0540 0.0810 0.1080 0.1800 phase Tea extract 0.0000 0.0360 0.0540 0.0720 0.1200 Citric acid 0.0 0.0 0.0 0.0 0.0 Incorporation ratio of — 0.0 0.0 0.0 0.0 acids with respire to tea extract Average particle size 296 288 290 310 294 (nm) CDM(hr)@120° C. 11.0 30.8 34.8 37.3 46.4 Evaluation of 2 1 0 0 0 astringency or unpleasant taste Incorporation of oil and Comparative fat composition Example 8 Example 9 Example 10 Example 18 Oil Canola oil phase Palm Ace N 99.7700 99.7150 99.6600 99.5130 PGPR 0.1200 0.1200 0.1200 0.1200 Aqueous Water 0.0540 0.0810 0.1080 0.1800 phase Tea extract 0.0360 0.0540 0.0720 0.1200 Citric acid 0.0200 0.0300 0.0400 0.0670 Incorporation ratio of 0.56 0.56 0.56 0.56 acids with respire to tea extract Average particle size 288 280 299 305 (nm) CDM(hr)@120° C. 36.8 41.9 46.7 55.6 Rate of increase (%) in 19 20 25 20 CDM value with respect to acid-free group Evaluation of 2 1 1 0 astringency or unpleasant taste

[0069] By the incorporation of the tea extract and the acids together, the oxidation stability of the oil and fat composition could be improved as compared with the addition of the tea extract alone. The effect was more effective as the formulation amount of tea extract was larger.

[0070] In addition, the combined use of acids and tea extract tended to reduce astringency and unpleasant taste. A similar effect was confirmed with palm olein.

[0071] The above-described effect was obtained by using citric acid, which is an organic acid, as the acid.

[0072] Accordingly, it was found that organic acids can be used as acids. It was also found that citric acid can be used as an organic acid.

Test Example 2

[0073] An oil and fat composition was prepared according to the incorporation described in Table 2 and (Adjustment Method), and evaluated according to (Evaluation Method). The results are shown in Table 2. It was described that the formulation amount of metaphosphoric acid was converted from metaphosphoric acid lump (37%) to achieve a purity of 100%.

TABLE-US-00002 TABLE 2 Incorporation of oil and fat Comparative Comparative Comparative composition Example 1 Example 7 Example 19 Example 11 Example 12 Oil Canola oil 100.000 99.7900 99.7880 99.7840 99.7800 phase PGPR 0.1200 0.1200 0.1200 0.1200 Aqueous Water 0.0000 0.0540 0.0540 0.0540 0.0540 phase Tea extract 0.0000 0.0360 0.0360 0.0360 0.0360 Citric acid 0.0 0.0000 0.0020 0.0060 0.0100 Incorporation — 0.00 0.06 0.17 0.28 ratio of acids with respire to tea extract Average particle — 300 299 289 286 size (nm) CDM(hr)@120° C. 5.6 13.7 13.7 15.4 15.7 Rate of increase — — 0 12 15 (%) in CDM value with respect to acid-free group Evaluation of 2 1 1 1 2 astringency or unpleasant taste Incorporation of oil and fat composition Example 5 Example 13 Example 14 Example 15 Oil Canola oil 99.7700 99.7600 99.7240 99.6360 phase PGPR 0.1200 0.1200 0.1200 0.1200 Aqueous Water 0.0540 0.0540 0.0700 0.1080 phase Tea extract 0.0360 0.0360 0.0360 0.0360 Citric acid 0.0200 0.0300 0.0500 0.1000 Incorporation 0.056 0.83 1.39 2.78 ratio of acids with respire to tea extract Average particle 252 299 312 322 size (nm) CDM(hr)@120° C. 16.1 16.6 16.6 16.7 Rate of increase 18 21 21 22 (%) in CDM value with respect to acid-free group Evaluation of 2 2 2 2 astringency or unpleasant taste Incorporation of oil and Comparative Comparative Comparative fat composition Example 20 Example 21 Example 22 Example 16 Example 17 Oil Canola oil 99.8160 99.8060 99.7960 99.7690 99.7825 phase PGPR 0.1200 0.1200 0.1200 0.1200 0.1200 Aqueous Water 0.0540 0.0540 0.0540 0.0540 0.0540 phase Tea extract 0.0 0.0 0.0 0.0360 0.0360 Citric acid 0.0100 0.0200 0.0300 DL-malic acid 0.0210 Metaphosphoric acid 0.0075 Incorporation ratio of 0.58 0.21 acids with respire to tea extract Average particle size 271 296 266 249 267 (nm) CDM(hr)@120° C. 5.6 5.6 5.6 16.2 16.4 Rate of increase (%) in — — — 18 20 CDM value with respect to acid-free group Evaluation of 2 2 2 2 2 astringency or unpleasant taste

[0074] The effect of improving the oxidation stability varied depending on the formulation amount of acid in the tea extract, and a 0.1 to 5 times the amount of tea extract was appropriate.

[0075] It was found that the oxidation stability was not improved by the acids alone.

[0076] The effect was also obtained by using DL-malic acid, which is an organic acid, as the acid.

[0077] The effect was also obtained by using metaphosphoric acid, which is an inorganic acid, as the acid.

[0078] Therefore, it was found that DL-malic acid can be used as an organic acid.

[0079] Accordingly, it was found that inorganic acids can be used as acids. It was also found that metaphosphoric acid can be used as an inorganic acid.

[0080] Preservation Test Results for Fats and Oils Only (Left at 60° C.)

[0081] (Evaluation of Oxidation Stability of Oil and Fat Composition)

[0082] The evaluation of astringency and unpleasant flavor of the product was performed by four skilled panels, and the flavor evaluation score was determined by agreement. A case where the flavor evaluation score is 1 or more is determined to be acceptable.

[0083] 2 points: Astringency or unpleasant taste is not felt.

[0084] 1 point: The flavor is different from that of Comparative Example 1, but no clear astringency or unpleasant taste is felt.

[0085] 0 points: Astringency and unpleasant taste are felt.

[0086] 80 g of canola oil adjusted product is input into a 100 ml glass bottle and sealed.

[0087] The glass bottle is preserved in a dark place at 60° C. for 28 days.

[0088] After preservation, the peroxide value (POV) is measured and the flavor is evaluated. The evaluation item of the flavor was the deteriorated odor of fats and oils, and the sensory evaluation was performed in 10 steps by four panelists.

[0089] Fats and oils having an evaluation score of 5 or more on the 21st day of preservation were determined to be excellent.

[0090] Sensory evaluation and deteriorated odor of fats and oils: The larger the number, the weaker the deteriorated odor, and the smaller the number, the stronger the deteriorated odor.

[0091] The evaluation results are shown in Table 3.

TABLE-US-00003 TABLE 3 Content in oil and fat composition Evaluation of (PPM by weight) astringency Sensory evaluation/number of Oil and fat Tea or unpleasant POV (meq/kg)/number of days of preservation days of preservation composition extract Acids taste 0.sup.th day 7.sup.th day 14.sup.th day 21.sup.st day 28.sup.th day 0.sup.th day 7.sup.th day 14.sup.th day 21.sup.st day 28.sup.th day Comparative 0 0 2 0.3 6.3 15.6 33.4 58.0 10 7 4 1 0 example 1 Comparative 360 0 1 0.3 3.2 5.7 10.3 17.3 10 8 7 5 4 example 7 Comparative 720 0 0 0.3 2.1 3.9 6.8 11.2 10 9 8 7 5 example 9 Comparative 1200 0 0 0.3 1.5 2.5 3.8 7.4 10 10 9 8 7 example 10 Comparative 0 100 2 0.3 6.2 15.4 34.0 59.2 10 7 4 1 0 example 20 Comparative 0 200 2 0.3 6.7 16.5 33.1 56.7 10 7 3 1 0 example 21 Comparative 0 300 2 0.3 6.5 16.1 43.9 63.2 10 7 3 0 0 example 22 Example 11 360 60 1 0.3 1.6 3.2 4.8 10.2 10 9 8 6 5 Example 12 360 100 2 0.3 1.4 3.0 4.6 6.7 10 10 9 8 7 Example 5 360 200 2 0.3 1.1 2.4 3.8 5.6 10 10 9 8 7 Example 13 360 300 2 0.3 1.0 2.1 3.5 5.3 10 10 9 8 7 Example 16 360 210 2 0.3 1.0 2.1 3.5 5.3 10 10 9 8 7 Example 17 360 75 2 0.3 1.0 2.1 3.5 5.3 10 10 9 8 7

[0092] In Examples, the POV and flavor could be maintained excellent compared to Comparative Example 7, which had the same tea extract content. In Examples, the quality was equal to or higher than that of Comparative Example 9 in which the amount of the tea extract was doubled. In addition, excellent results were obtained in terms of astringency and unpleasant taste.

[0093] Even when any acids such as citric acid (Examples 5, 11, 12, and 13), which is an organic acid, DL-malic acid (Example 16), and metaphosphoric acid (Example 17), which is an inorganic acid, were used as the acids to be used, the above-described effect was also obtained.

[0094] Application Evaluation (Preservation Test with Rice Cracker Spray)

[0095] (Preparation Method and Evaluation Method of Rice Cracker)

[0096] 20 parts of each prepared oil and fat composition was spray-coated on 80 parts of commercially available rice crackers (non-oil, no taste) to prepare rice crackers.

[0097] The flavor of rice crackers was evaluated. The evaluation results are shown in Table 4.

[0098] The evaluation of astringency and unpleasant flavor of the product was performed by four skilled panels, and the flavor evaluation score was determined by agreement. A case where the flavor evaluation score is 1 or more is determined to be acceptable.

[0099] 2 points: Astringency or unpleasant taste is not felt.

[0100] 1 point: The flavor is different from that of Comparative Example 1, but no clear astringency or unpleasant taste is felt.

[0101] 0 points: Astringency and unpleasant taste are felt.

[0102] The rice cracker was put into an aluminum vapor-deposited bag and preserved in a dark place at 60° C., and the POV of fats and oils extracted from the rice cracker with hexane was measured over time.

[0103] In addition, the flavor after preservation was evaluated. The evaluation item of the flavor was the deteriorated odor of fats and oils, and the sensory evaluation was performed in 10 steps by four panelists. Fats and oils having an evaluation score of 6 or more on the 7th day of preservation were determined to be excellent.

[0104] Sensory evaluation and deteriorated odor of fats and oils: The larger the number, the weaker the deteriorated odor, and the smaller the number, the stronger the deteriorated odor.

TABLE-US-00004 TABLE 4 Content in oil and fat composition Evaluation of (PPM by weight) astringency or POV (meq/kg)/number of Sensory evaluation/number of Oil and fat Tea unpleasant days of preservation days of preservation composition extract Acids taste 0.sup.th day 7.sup.th day 14.sup.th day 0.sup.th day 7.sup.th day 14.sup.th day Comparative 0 0 2 0.9 41.8 123.1 10 1 0 example 1 Comparative 360 0 1 0.9 25.3 43.3 10 3 1 example 7 Comparative 720 0 0 0.9 11.6 24.7 10 6 3 example 9 Comparative 1200 0 0 0.9 9.0 15.1 10 7 5 example 10 Comparative 0 100 2 0.9 43.7 126.7 10 1 0 example 20 Comparative 0 200 2 0.9 45.4 148.7 10 1 0 example 21 Comparative 0 300 2 0.9 42.2 136.5 10 1 0 example 22 Example 11 360 60 1 0.9 9.1 18.3 10 6 3 Example 12 360 100 2 0.9 7.5 17.1 10 7 4 Example 5 360 200 2 0.9 6.1 14.5 10 8 5 Example 13 360 300 2 0.9 5.3 12.3 10 8 5 Example 16 360 210 2 0.9 5.8 13.5 10 7 4 Example 17 360 75 2 0.9 6.2 12.1 10 8 5

[0105] The application using the oil and fat compositions of Examples 5, 11 to 13, 16, and 17 could maintain more excellent POV and flavor than those in the application using the oil and fat composition of Comparative Example 7 having the same tea extract content. In Examples, the quality was equal to or higher than that of Comparative Example 9 in which the amount of the tea extract was doubled. In addition, excellent results were obtained in terms of astringency and unpleasant taste. Results similar to a case of using only fats and oils were obtained with only fats and oils.

[0106] Similar to only fats and oils, even when any acids such as citric acid (Examples 5, 11, 12, and 13), which is an organic acid, DL-malic acid (Example 16), and metaphosphoric acid (Example 17), which is an inorganic acid were used as the acids to be used, the above-described effect was also obtained.

INDUSTRIAL APPLICABILITY

[0107] According to the present invention, it is possible to provide an edible oil or fat containing tea extract, which has improved oxidation stability and has excellent flavor, which can be used for all food products without increasing the formulation amount of the tea extract.