JP2009201447A - Method for coloring candy - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide candies colored with vivid red or purplish red, excellent in heat resistance and light stability, having high transparency, and excellent in flavor release. <P>SOLUTION: The candies are colored using a pigment which is obtained by extracting plants belonging to Ipomoea genus of Convolvulaceae family with water or hydrous alcohol under an acidic condition of pH 1.0-6.5, and subjecting the product to at least one kind of treatment selected from the group consisting of absorption treatment, ion exchange treatment, acid treatment, and membrane separation treatment. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a method for coloring candies that can be colored bright red to purple red. In detail, it is related with the coloring method of the candy which was excellent in heat resistance and light resistance, and excellent in flavor release.

Conventionally, food red No. 2 and aluminum lake, food red No. 3 and aluminum lake,
Food Red No. 40 and Aluminum Lake, Food Red No. 102, Food Red No. 104, Food Red No. 105, and Food Red No. 106, Carmoisine (Azorubin), Citra Red No. 2 New Red, Aluminum Lake, and Carmine have been used as colorants for various foods because they are excellent in light resistance and can be used for coloring foods in vivid colors. Fees tend to be shunned. As a coloring method of candy using natural pigments from red to purple red, a method using red cabbage pigment (Patent Document 1), other quinone pigments such as cochineal pigment and lac pigment, grape juice, grape skin pigment Berry pigments, purple corn pigments, beet reds, red potato pigments and the like are known. However, when a red cabbage dye is used, the odor unique to the dye affects the flavor of the candy. The quinone dye such as cochineal dye changes from yellow to orange when the pH is 5 or less, and changes from desired red to purple red. The red koji pigment was not lightly colored, and beet red had poor heat resistance, and the color of the pigment was markedly faded, reducing the commercial value. Even when grape juice, grape skin pigment, berry pigment, or purple corn pigment is used, there is a problem that the desired vivid red to purple red color cannot be achieved, and the light resistance is remarkably inferior. It was difficult to color vivid red to purple-red with this dye. In addition, for candy, a material such as fruit juice or a flavor release such as a fragrance greatly affects the flavor. In this respect, the synthetic colorant has a high component content and has a small amount of addition to foods, and therefore has little effect on the flavor of foodstuffs. However, the natural colorant has a drawback in that the effects other than coloring such as the smell and taste of the material affect the flavor of the food.

Japanese Examined Patent Publication No. 63-32427

  An object of the present invention is to provide a candy colored in a red or purple red color that is colored bright red to purple red, has excellent heat resistance and light resistance, has no influence on the flavor of the candy itself, and has a good flavor release. And

  As a result of intensive studies in view of the above problems, the present inventors have extracted a plant belonging to the genus Ipomoea belonging to the family Convolvulaceae with water or hydrous alcohol under acidic conditions of pH 1.0 to 6.5, followed by an adsorption treatment. By using a pigment obtained by performing at least one treatment selected from the group consisting of ion exchange treatment, acid treatment and membrane separation treatment, a bright red to purple color is produced without affecting the original flavor of candy. The present invention was completed by discovering that the candy colored by this method can be colored red, and has heat resistance and light resistance, and also has good flavor release.

The present invention relates to a method for coloring candies having the following aspects;
Item 1. A plant belonging to the genus Ipomoea belonging to the family Convolvulaceae is selected from the group consisting of adsorption treatment, ion exchange treatment, acid treatment and membrane separation treatment after extraction with water or hydrous alcohol under acidic conditions of pH 1.0 to 6.5. A method for coloring candies, characterized by using a pigment obtained by performing at least one treatment.

  It is possible to provide candy that is colored bright red to purple red and has excellent heat resistance and light resistance, and also excellent flavor release.

  Examples of plants of the genus Ipomoea belonging to the family Convolvulaceae of the present invention include Ipomoea Batatas, Ipomoea nil, Ipomoea congesta, Ipomoea alba and the like, preferably Ipomoea Batatas. Such plant extracts are acidic conditions of pH 1.0 to 6.5, preferably pH 2 to 4 in a plant belonging to the genus Ipomoea belonging to the family Convolvulaceae, exhibiting red to purple red, such as leaves, stems, or tuberous roots. Under extraction with water or hydrous alcohol.

  A sour agent is usually used for pH adjustment to acidic conditions during the plant body extraction. Although not limited, specific examples of such acidulants include citric acid, lactic acid, acetic acid, glacial acetic acid, malic acid, tartaric acid, fumaric acid, phytic acid, gluconic acid, succinic acid, ascorbic acid, adipic acid, itaconic acid. , Organic acids such as glucono delta lactone or salts thereof (for example, sodium citrate, monosodium fumarate); inorganic acids such as phosphoric acid and carbon dioxide (carbon dioxide), sulfuric acid, hydrochloric acid, etc., preferably Those recognized as food additives such as citric acid, malic acid and tartaric acid can be preferably used. The hydrous alcohol used for extraction refers to a solvent that can be uniformly mixed with water, such as lower alcohols such as methanol and ethanol, and polyhydric alcohols. A preferable example of the extract is ethanol. As the water-containing alcohol, for example, a water-containing alcohol having an alcohol amount of 40% by volume or less, preferably about 25% by volume or less can be suitably used.

  As an extraction method, an extraction site of a plant belonging to the genus Ipomoea belonging to the family Convolvulaceae is washed, or is cut into an appropriate size, or ground into a paste and then poured into an acid-adjusted extract. A method of immersing the plant by cold or digestion for 12 hours or overnight can be mentioned. The obtained extract can be concentrated as it is, after removing solids by filtration, coprecipitation or centrifugation as required.

  In the present invention, the extract thus obtained is further subjected to at least one treatment selected from the group consisting of adsorption treatment, ion exchange treatment, acid treatment and membrane separation treatment.

  The adsorption treatment can be carried out according to a conventional method, for example, adsorption treatment with activated carbon, silica gel, porous ceramic or the like; styrene-based duolite S-861 (trademark Duolite, USA, manufactured by Diamond Shamrock, The same shall apply hereinafter), Duolite S-862, Duolite S-863 or Duolite S-866; aromatic Sepa beads SP70 (trademark, manufactured by Mitsubishi Chemical Corporation, the same shall apply hereinafter), Sepa beads SP700, Sepa beads SP825; Diaion HP10 (trademark, manufactured by Mitsubishi Chemical Corporation, the same applies hereinafter), Diaion HP20, Diaion HP21, Diaion HP40, and Diaion HP50; or Amberlite XAD-4 (trademark, manufactured by Organo, the same applies hereinafter), Amberlite XAD-7, Amberlite XAD-2 The synthetic adsorption resin such as 00 adsorption treatment can be given using. Thereafter, the resin carrier to which a plant pigment extract belonging to the genus Ipomoea belonging to the family Convolvulaceae is attached and adsorbs the pigment component can be recovered and obtained by washing with a suitable solvent such as hydrous alcohol. As a hydrous alcohol, the water which normally contains about 1-20 volume% ethanol can be illustrated suitably.

  The ion exchange treatment is not particularly limited and can be performed according to a conventional method using a conventional ion exchange resin (cation exchange resin or anion exchange resin). Examples of the cation exchange resin include, but are not limited to, Diaion SK1B (trademark, manufactured by Mitsubishi Chemical Corporation, the same shall apply hereinafter), Diaion SK102, Diaion SK116, Diaion PK208, Diaion WK10, Diaion WK20, and the like. Examples of the anion exchange resin include, but are not limited to, Diaion SA10A (trademark, manufactured by Mitsubishi Chemical Corporation, the same shall apply hereinafter), Diaion SA12A, Diaion SA20A, Diaion PA306, Diaion WA10, Diaion WA20, and the like. Is done.

  Acid treatment is performed by extracting a plant belonging to the genus Ipomoea belonging to the Convolvulaceae family with water or hydrous alcohol under acidic conditions of pH 1.0 to 6.5, or various treatments described above (adsorption treatment, ion The treatment liquid subjected to exchange treatment, extraction treatment, membrane separation treatment, etc.) can be carried out by exposing it to acidic conditions of pH 1-4, preferably pH 1-3. Specifically, the acid treatment can be easily carried out by adding and adding an acid to the treatment liquid. As such an acid, the above-mentioned acids can be used.

  The temperature conditions for performing the acid treatment are not particularly limited, and can be appropriately selected from a range of usually 5 to 100 ° C. For example, the range of 20-100 degreeC and 40-100 degreeC can be illustrated. The acid treatment time is not particularly limited, and can be appropriately selected from the range of usually 1 to 300 minutes. In general, if the acid treatment is performed at a high temperature, a shorter treatment time is sufficient. Therefore, for example, in the case of acid treatment at 40 to 100 ° C., the treatment time can be selected from the range of 5 to 60 minutes. At this time, the treatment liquid is not particularly limited even if it is not stirred.

  The membrane separation treatment in the present invention broadly means a filtration method using a membrane, such as a membrane filter (MF) membrane, an ultrafiltration (UF) membrane, a reverse osmosis membrane (NF), and an electrodialysis membrane. Examples thereof include a filtration treatment using a functional polymer membrane. In addition, membrane separation treatment includes ultrafiltration and reverse osmosis using these membranes, as well as dialysis using concentration gradients due to ion-selective membranes, and electricity that applies an ion exchange membrane as a diaphragm. Dialysis methods are known. Industrially, a membrane separation treatment by a reverse osmosis membrane method is preferable. Examples of the membrane material used for the membrane separation treatment include natural, synthetic and semi-synthetic materials such as cellulose, cellulose di-acetate or tri-acetate, polyamide, polysulfone, polystyrene, polyimide, polyacrylonitrile and the like. be able to.

The membrane separation treatment used in the present invention includes a treatment method in which a polymer compound is separated and removed using a membrane having a fractional molecular weight in the range of, for example, 10 ⁴ to 10 ⁶ , and a fractional molecular weight of about 2,000 to 4, A treatment method for separating and removing low molecular weight compounds using a membrane of about 3,000, preferably about 3,000 is included. Specifically, as the former method, NTU-3150 membrane, NTU-3250 membrane, NTU-3550 membrane, NTU-3800 UF membrane (manufactured by Nitto Denko); Cefilt-UF (manufactured by NGK); AHP-2013 membrane, Examples thereof include ultrafiltration (UF) membrane treatment using AHP-3013 membrane, AHP-1010 membrane (manufactured by Asahi Kasei); and the like. Specific examples of the latter method include NTR-7250 membrane, NTR- 7410 film, NTR-7430 film, NTR-7450 film (manufactured by Nitto Denko); AIP-3013 film, ACP-3013 film, ACP-2013 film, AIP-2013 film, AIO-1010 film (manufactured by Asahi Kasei) And reverse osmosis membrane (fraction molecular weight of about 3,000) treatment using a membrane such as

These various treatments may be performed singly or in any combination of two or more, and the same treatment may be repeated under the same or different conditions.
A preferred treatment method is not particularly limited, but is a method in which an adsorption treatment solution of a plant pigment extract belonging to the genus Ipomoea belonging to the family Convolvulaceae is deproteinized, and then a membrane separation treatment is performed on this treated protein solution.

The deproteinization treatment can be effectively performed by the above-described extraction treatment, ion exchange treatment, membrane separation treatment using an ultrafiltration membrane or the like. In this case, as the membrane separation treatment, a treatment using a membrane having a fractional molecular weight of about 10 ⁴ to 10 ⁶ used for separation and removal of the polymer compound can be suitably employed. However, the deproteinization treatment is not limited to these methods, and can be performed according to a conventional deproteinization treatment such as gel filtration treatment.

  If necessary, an adsorption treatment can be further performed after the deproteinization treatment. As a preferred treatment method, there can be mentioned a method in which a treated dye solution subjected to deproteinization is subjected to an adsorption treatment as necessary, followed by an acid treatment, and a membrane separation treatment is carried out on the treated dye solution thus obtained. . Here, the membrane separation treatment is preferably reverse osmosis membrane treatment or ultrafiltration membrane treatment, and more preferably reverse osmosis membrane treatment. The membrane separation treatment is preferably performed using a membrane having a molecular weight cut-off of 2,000 to 4,000, preferably around 3,000.

  In this invention, it is related with the coloring method of the candy characterized by using the pigment | dye obtained in this way. Such a pigment is effectively removed from aroma components that cause plant-derived off-flavors or malodors, and without affecting the original flavor of the candy by using the pigment, as a candy excellent in flavor release, Candy can be colored bright red to purple red.

  At this time, the pigment obtained in the present invention may be a liquid product as in the above-mentioned shape, or in a shape obtained by adding an excipient such as dextrin and lactose and spray-dried to form a powder, an emulsifier such as a glycerin fatty acid ester, It may be in the form of emulsification or double emulsification using sorbitan fatty acid ester, gum arabic or the like. The pigment preparation of the present invention thus obtained is added to the candy for use.

  Examples of the candy referred to in the present invention include hard type candy such as drop and satch; soft type candy such as caramel, nougat and marshmallow, starch candy, gummy candy and the like. And by using the pigment | dye of this invention, the said candy is colored bright red thru | or purple red, and the obtained candy becomes candy excellent in light resistance and heat resistance. In addition, depending on the type of candy, there is a demand for high transparency as well as vividness of coloration. By using the pigment of the present invention, a candy having high transparency, that is, hue saturation, is provided. Is possible. Furthermore, since the pigment | dye of this invention has remarkably reduced the odor peculiar to a pigment | dye, it can provide the candy excellent in the original flavor and flavor release of candy.

Hereinafter, the coloring method of these candies is demonstrated.
For example, in the case of hard candy, any sugar such as sugar, starch syrup, and various sugar alcohols is mixed with water, heated and dissolved to about 150 ° C., and then allowed to cool to about 130 ° C. for flavoring and various acidulants. Can be prepared by adding and mixing the coloring matter of the present invention, filling into a mold such as a container, molding, and solidifying by cooling. In the case of soft candy, raw materials such as sugars and appropriate thickening polysaccharides are mixed and dissolved in water, the solution is heated and boiled, then cooled to about 100 ° C., and ordinary emulsifiers such as fats and oils are added. In addition, after mixing and adding a fragrance | flavor and the pigment | dye of this invention, it can prepare by passing through the process of crystallizing, and the process of filling the boiled solution into a type | mold. If it is a gummy candy, saccharides such as starch syrup, sugar, and thickening polysaccharides are boiled as necessary, and the coloring matter of the present invention is added when auxiliary ingredients such as gelatin, fruit juice, acidulant, and flavoring are added as appropriate. This can be prepared by filling a molding machine. Note that these candies have a high temperature at which the fluidity necessary for filling and molding is obtained, which is as high as about 100 to 160 ° C., and the dye used is exposed to an extremely high temperature state. It is extremely stable and has heat resistance comparable to that of a synthetic colorant characterized by having heat resistance. On the other hand, conventional natural pigments are recognized to fade by about several percent under such sterilization conditions.

The blending ratio of the dye of the present invention to the candy is not particularly limited as long as it is an amount that can impart a desired color to the candy. As an example, the blending ratio of the pigment of the present invention (E ^10% _{1 cm} = 160) to 100% by mass of candies is 0.0005 to 1.0% by mass, preferably 0.001 to 0.5% by mass. be able to.

Note that “E ^10% _{1 cm} = 160” in the dye of the present invention means the concentration (color value) of the dye of the present invention to be blended in candy, and specifically, the dye of the present invention When the absorbance at the maximum absorption wavelength in the visible part of the 10 wt / v% solution is measured at a liquid layer width of 1 cm, it means 160.

  Hereinafter, the content of the present invention will be specifically described with reference to the following examples and comparative examples, but the present invention is not limited thereto.

Example 1 Preparation of Strawberry Candy 10 kg of Ipomoea Batatas tuberous ground product was put into 20 L of acidic water adjusted to pH 2 with sulfuric acid, and left overnight at room temperature to extract the pigment. The obtained pigment extract was mixed with a filter aid and diatomaceous earth, and suction filtered to obtain about 25 L of Ipomoea Batatas plant pigment extract as the filtrate. This extract was adsorbed on synthetic adsorption resin Amberlite XAD-7 (resin amount 3 L, SV = 1, manufactured by Organo), washed with water, and then the adsorbed dye was eluted using 60% ethanol aqueous solution. (10 L). 8 L of the eluate was treated at 3.5 kg / cm ² and 20 ° C. using an ultrafiltration membrane (AHP-2013 membrane (trademark): manufactured by Asahi Kasei, molecular weight cut off 50,000) (membrane separation treatment). . Next, the obtained treatment liquid was adjusted to pH 2.0 using sulfuric acid, and stirred for 30 minutes under a temperature condition of 40 to 80 ° C. (acid treatment). Subsequently, 5 L of water was added to the acid treatment solution, and reverse osmosis membrane treatment (NTR-7250 membrane (trademark): manufactured by Nitto Denko, fractional molecular weight of about 3,000) was performed to obtain 1 L of membrane treatment solution. (Membrane separation process). At this time, the aromatic component and impurities of Ipomoea Batatas were permeated and removed as a filtrate, and the purified and deodorized pigment component was concentrated as a residual solution. Subsequently, this residual liquid was concentrated under reduced pressure to obtain 120 g of a concentrated liquid having a color value E of ^10% _{1 cm} = 300 and significantly deodorized and purified. 60 g of water and 45 g of ethanol were added to 120 g of this concentrated liquid to prepare 225 g of Ipomoea Batatas (A) dye preparation having a color value E of ^10% _{1 cm} = 160. This formulation was completely odorless. Next, the Ipomoea Batatas (A) dye preparation thus obtained was added and mixed according to the formulation shown in Table 1 below to prepare a strawberry candy (Example 1). Specifically, a mixture of water, sugar and starch syrup is heated and dissolved to 150 ° C., boiled to 100 g, cooled to 120 ° C., and the prepared Ipomoea Batatas (A) pigment preparation is added with citric acid and strawberry flavor. After molding, the mixture was cooled to room temperature to prepare a hard candy.

  As a comparative example, instead of Ipomoea Batatas (A) pigment preparation, Ipomoea Batatas (B) pigment preparation (Comparative Example 1) prepared by the following method, red cabbage pigment, red yeast rice pigment, grape juice and purple corn pigment, Strawberry candy was prepared for each of the individual feelings of almost the same concentration (Comparative Examples 2 to 5), and these strawberry candy and the strawberry candy of Example 1 were evaluated with respect to hue, light resistance, transparency and flavor. . The results are shown in Table 2.

Comparative Example 1 Preparation of Ipomoea Batatas (B) Dye Formulation 10 kg of Ipomoea Batatas tuberous ground product was added to 20 L of acid water adjusted to pH 2 with sulfuric acid, and the mixture was left overnight at room temperature to extract the pigment. The obtained pigment extract was mixed with a filter aid and diatomaceous earth, and suction filtered to obtain about 25 L of Ipomoea Batatas plant pigment extract as the filtrate. Next, this solution was concentrated under reduced pressure to obtain 160 g of a dye solution having a color value E of ^10% _{1 cm} = 300. 80 g of water and 60 g of ethanol were added to 160 g of this concentrated liquid to prepare 300 g of Ipomoea Batatas (B) pigment preparation having a color value E ^10% _{1 cm} = 160.

The evaluation in Table 2 was performed according to the following criteria.
(Hue): The hue of the colored strawberry candy was observed with the naked eye.
(Light resistance): After irradiation for 3 days under a fluorescent lamp (3000 lux), the residual ratio (%) of the dye was determined by visual comparison.
(Transparency): The colored strawberry candy was evaluated in five grades in the order of high transparency: ++>+++++>±> −.
(Flavor release): Evaluation was made in five stages of +++>++>+>±> − in order from the one with the best flavor release when eating colored strawberry candy.

As can be seen from Table 2, when red cabbage pigment preparation was used, the candy could be colored in magenta, but the flavor release of strawberry candy deteriorated due to the odor peculiar to the pigment. In this case, the dye faded due to light irradiation, and the candy was not colored even in the target color (Comparative Examples 2 and 3). Even when using grape juice preparation or purple corn pigment preparation, the color of the colored candy is dark red or yellowish red, and it cannot be colored to the desired clear red to purple red, and its transparency is also It was inferior to the Ipomoea Batatas (A) pigment preparation (Comparative Examples 4 and 5). Moreover, even when Ipomoea Batatas pigment extracted with water or hydrous alcohol under acidic conditions of pH 1.0 to 6.5 is used, the group consisting of adsorption treatment, ion exchange treatment, acid treatment and membrane separation treatment The Ipomoea Batatas (B) dye preparation (Comparative Example 1) obtained without performing at least one treatment selected from the above has a odor peculiar to the dye in the candy compared to the Ipomoea Batatas (A) dye preparation of the present invention. The intended candy could not be prepared.
On the other hand, when the Ipomoea Batatas (A) pigment preparation of the present invention is used, the candy is colored in the desired bright red to purple red color, and the odor peculiar to the pigment does not affect the taste of the candy itself, The colored candy had a good flavor release. Furthermore, the prepared colored candy has high light resistance and transparency, and it became a very excellent strawberry candy.

The present invention provides candy that is colored bright red to purple-red, is excellent in heat resistance and light resistance, and is excellent in transparency and flavor release.

Claims (1)

A plant belonging to the genus Ipomoea belonging to the family Convolvulaceae is selected from the group consisting of adsorption treatment, ion exchange treatment, acid treatment and membrane separation treatment after extraction with water or hydrous alcohol under acidic conditions of pH 1.0 to 6.5. A method for coloring candies, characterized by using a pigment obtained by performing at least one treatment.