JPS61268133A - Solubilized evening primrose oil - Google Patents

Abstract

PURPOSE:To obtain a solubilized evening primrose oil having improved stability, by solubilizing an evening primrose oil in water with a saponin. CONSTITUTION:A solubilized evening primrose which is obtained by solubilizing an evening primrose oil in water by the use of a saponin. A saponin-containing essence obtained from any of various kinds of plants containing saponin such as bark of Quilaya saponaria, pericap of Sapinclus mukurossi, root of Saponaria officinalis L., fruit of Thea sinensis L., etc., may be used as the saponin, and a purified saponin obtained by treating the essence with active carbon, adsorption resin, etc. is preferable since it has low coloring. To produce the solubilized evening primrose oil, usually 0.1-20wt% aqueous solution of a saponin in an amount to give 0.5-5 times as much as an evening primrose to be solubilized is used, and dropped to the evening primrose oil while stirring. In this case, a surface active agent except a saponin, a stabilizer, etc., may be added to the aqueous solution of the saponin so long as the additives will not inhibit its solubilizing action.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a solubilized evening primrose oil that is used to incorporate evening primrose oil into aqueous foods, drinks, medicines, and the like.

Conventional technology Evening primrose oil contains a large amount of cislinoleic acid, which is one of the essential fatty acids for humans, and also contains a large amount of gamma luric acid, so it has become widely used in pharmaceuticals, cosmetics, and various foods. Ta.

However, it goes without saying that evening primrose oil, which is an oil, is not soluble in water, so unless the substance to be added is oil-based, m R111l啼* n 41 thread size 11s1
m1, Idll and λ Yamaana's voice is 〒Sat Yuba Fu general,
It is difficult to convert oils and fats with low specific gravity into aqueous liquids by simply using food-grade emulsifiers with slightly weak emulsifying power, so emulsification can be made easier by adding sugars, gums, proteins, etc. to increase the viscosity. These methods are often used in combination. Evening primrose oil is no exception since it is a low specific gravity fat with a specific gravity of 0.918 g/cm3.

However, the oil/fat emulsion obtained by this method is
There are difficulties in heat resistance, acid resistance, storage stability, etc., and heat sterilization,
There are two ways in which oil droplets or oil layers may separate due to mixing with foods and drinks, dilution during eating and drinking, long-term storage, etc.

Problems to be Solved by the Invention The object of the present invention is to provide an evening primrose oil aqueous solution having excellent stability.

Means for Solving the Problems The present invention solves the above problems by solubilizing evening primrose oil using saponin.

Saponin is a type of steroid or terpene glycoside that widely exists in the plant kingdom, and its sugar components include glucose,
(Lactose, arabic acid, uronic acid, etc.) The saponin used in the preparation of the evening primrose oil solubilized product of the present invention can be used in various plant tissues containing saponin, such as Quilla
laja 5aponaria) (7') Bark, Sapinclus mukurossi pericarp, Saponaria ofTici
nalis L, ) root, tea (Thea 5inens
A saponin-containing extract obtained from the fruit of IsL, ) may be used, but purified saponin obtained by treating this with activated carbon, adsorption resin, etc. is preferable because it has less coloring.

To produce the evening primrose oil solubilized product of the present invention, saponins are usually added in an amount of 0.1 to 20% in an amount of 0.5 to 5 times (preferably 1 to 3 times) the amount of evening primrose oil to be solubilized. An aqueous solution (preferably a 1-15% aqueous solution) is prepared, and evening primrose oil is added dropwise to the solution while stirring. In that case, surfactants, stabilizers, etc. other than saponins may be added to the saponin aqueous solution within a range that does not interfere with the solubilization effect.

When the evening primrose oil solubilized product according to the present invention is diluted with water at a high ratio, part or all of the evening primrose oil is transferred from the solubilized state to the emulsified state, and the emulsion formed thereby also has good stability. It is something that you have. Therefore, the evening primrose oil solubilized product of the present invention may be diluted to form an emulsion before use.

Actions and Effects In the evening primrose oil solubilized product of the present invention, the evening primrose oil is solubilized by the solubilizing action of saponins as described above, and as a result, the entire evening primrose oil solubilized product takes on the form of a transparent aqueous solution. ing. This solubilized liquid has much better stability than evening primrose oil emulsions made with conventional food emulsifiers, and also has excellent resistance to heating, pH changes, dilution, etc.

Therefore, the evening primrose oil solubilized product of the present invention can withstand longer storage than conventional evening primrose oil emulsions and can be easily and uniformly mixed into a wide range of foods, drinks, pharmaceuticals, etc. Evening primrose oil can now be used in combination with other subjects.

``Chorus'' The present invention will be explained below with reference to Examples.

Example 1 10 g of evening primrose oil was added dropwise to 90 g of 75% high-fructose corn syrup containing 20% Quillaja saponin while stirring, and stirring was continued to obtain a reddish-brown transparent solution in which evening primrose oil was solubilized. .

When this solubilized solution was diluted 500 times with water, it became slightly milky white, but the whole was uniform. Furthermore, even when the pH was lowered to 4 with citric acid, no change was observed;
It was stable even when heated to 0°C for 30 minutes and then cooled to room temperature.

Example 2 62 g of 75% high-fructose corn syrup, 8 g of Quillaja saponin, and 10 g of lucitin were heated to 60° C. and mixed uniformly, and 20 g of evening primrose oil was added dropwise thereto while stirring and mixing the whole mixture using a homomixer. As a result, a yellow-brown, almost transparent viscous liquid in which evening primrose oil was solubilized was obtained.

When this solubilized liquid was diluted 500 times with water, it became milky white, but no separation of the oil layer was observed. Further, this diluted solution showed no change at all even when its pH was lowered to 4 with citric acid, and was stable even when it was heated to 90° C. for 30 minutes and then cooled to room temperature.

Claims (2)

[Claims] (1) Evening primrose oil solubilized product obtained by solubilizing evening primrose oil in water with saponins. (2) The evening primrose oil solubilized product according to claim 1, wherein the saponin is Quillaja saponin.