JPS5921360A - Process for stable coloring of food made from wheat flour - Google Patents

Abstract

PURPOSE:To prevent the color change of a food made from wheat flour and colored with the pigment of gardenia, by using the gardenia pigment fractionated and purified with a porous adsorbent resin. CONSTITUTION:The fruit of gardenia is extracted with water or an about 20% alcohol solution to separate the gardenia pigment from the fruit. The extract liquid is made to contact with a porous adsorbent resin to effect the adsorption of the yellow pigment and green-colored substance from the gardenia pigment to the resin. The resin is treated with a 25% alcohol solution to elute the green- colored substance, and then with 50% alcohol solution to separate the yellow pigment. The eluate is filtered and concentrated to obtain a concentrated liquid or pulverized to obtain purified gardenia pigment. When a food made from wheat flour such as vermicelli is colored with the pigment, the obtained yellow color lasts for a long period.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a flour characterized in that a gardenia pigment extract obtained from the fruit of a gardenia belonging to the Rubiaceae family is purified using a porous adsorption resin, and then added as a yellow pigment. This paper relates to a method for stably coloring foods.

Generally, gardenia pigments are used by extracting gardenia fruit with water or hydroalcohol, sowing and concentrating to obtain a concentrate or powder. .

These gardenia pigments are widely used in the food field as natural yellow pigments due to their relatively high stability such as light resistance and heat resistance. (1) It is known that food products turn green, significantly reducing their product value.

The present inventors have conducted extensive research in order to prevent the green discoloration phenomenon described above and to make it possible to use gardenia pigment safely in foods made from wheat flour. As a result, greening substances other than the yellow pigment contained in the gardenia pigment extract were removed using a porous adsorption resin. Achieving the target 1. I discovered that.

That is, a gardenia pigment extract is made into an aqueous solution (~ is a 20% alcohol solution) and is adsorbed by contact with a porous light-absorbing resin packed in a column.Then, the impurity green substance is eluted and removed with 25% alcohol. After 7 days, the yellow pigment is eluted with 50% alcohol or alcohol.The purified gardenia pigment obtained by concentrating this eluate is used for noodles etc. [1
We have discovered that when added as a yellow pigment to target foods, these foods do not change color at all and retain their consistent yellow color for a long time.

Based on the article by Nagisa et al., 4-tl, I used wheat flour to complete the present invention regarding the method of stabilizing food.

! J1. + (= Describe in detail the purified gardenia pigment product θ used in the present invention, 4-Mas, contact with porous adsorption resin-] The gardenia pigment extract to be used is not an aqueous solution (
, rl, 2 (needs to be a 1% alcohol solution.

1! If 'l;, Al, gono1 (at higher concentrations, the adsorption of the yellow pigment -111 and greening substances to the resin is seriously impaired; even if 1's (☆1 fat is used, fractional purification is impossible This is because the resin used for fractionation is preferably HP 20 porous f1, adsorption resin manufactured by Mitsubishi Kasei Corporation, and resin 1j1 is '3' (usually contains gardenia pigment extract). I↓Iru (・″ーーる Ill! L、、
;/, -ris-f-su/ fruit with a volume of about twice as much as the fruit of 42: 42 Next, the resin was adsorbed and the yellow pigment and green matter were removed.
Separation from 1j kt - First, green discoloration substances are eluted and removed with 25% alcohol. At this time, the alcohol concentration was 7
11.1: If the temperature is extremely low, the greenish substance will not be eluted sufficiently, and if it is extremely high, the yellow pigment and the greenish substance will be eluted together, and in either case, the separation should be completed. Result and 4: t', no. Then, the yellow pigment was eluted using 50% alcohol. The eluate 6 and the necessary amount can be filtered and then concentrated to dissolve the concentrate or powdered to obtain the desired purified cutilan pigment.

In general, it is believed that the greening phenomenon of gardenia fruits is caused by the interaction of greening substances with enzymes in food; Second, it does not change color at all and can maintain its color tone stably even when added to 76 foods using wheat flour that often turns green, such as noodles.

A general production example of purified gardenia color tip used in the present invention is shown below.

Production Example: 100 g of gardenia fruits were roughly crushed, 300 ml of 50% ethyl alcohol was added to the resulting mass, and extracted with stirring for 2 hours. After solid-liquid separation, add 300 ml of 50% ethyl alcohol to the residue, stir for 1 hour, and re-extract.
The extracts were combined and concentrated under reduced pressure using a sieve of about 50 me to obtain d (silk at 62.3F. The 44Dnm1 of this product was 21.7.) Next, this concentrated 11 Dilute the water with water ``J O me ''c diluted L, H 1'' 2 0
Filled with porous adsorption resin 2QOJ/. - Pass the liquid through the tunorum. Furthermore, after passing 100 me of water and washing the resin,
Green discoloration substances are eluted and removed using Thiechira/L Near-/. At this time, almost no yellow lacquer was eluted, and the eluate was slightly yellow.

Next, pass through 200 me of alcohol to elute the 4 color pigment, and concentrate the eluate by 1 month.
r! t/. −. This l/:4 a? i item 440n
The K I % in m is 22.0, and the yellow pigment is lost by 111 isl and 2 gt by the fractional purification treatment.

Next, an example will be shown using the purified gardenia pigment obtained in (i) in Production Example 1.

Example 1 The frf gardenia pigment obtained in the production example was
...) [In 1.1, an aqueous solution of 8 me was added to strong wheat flour (manufactured by Nippon Flour Mills Co., Ltd.) 202 and rolled into a t-type to create a noodle machine. On the other hand, control and CE: “(4
40nm)0. A noodle machine was similarly prepared using the unpurified gardenia pigment extract adjusted to 1. These noodle machines were stored in a warm bath at 38 to 39 degrees and the changes in color were visually observed.
The results are shown in Table 1.

Table 1 As shown in Table 1, when unpurified gardenia pigment is added, 5
11. ! After the J song, the color begins to change and turns completely green after 22 hours. Nevertheless, no change in color tone was observed even after 70 hours in the purified gardenia pigment-added area.

Example 2 Flour made by Flun Flour Co., Ltd. Kotobuki 500y, Akamatsu 50
C on 07! (44[1 nm) Dissolve 0.6'i' of gardenia pigment made in the manufacturing method example, 102 of common salt, and 47 of brine, adjusted to 20, in 320y of water and add at 1 to 1. Follow the usual method. I made Chinese noodles. On the other hand, as a control, raw Chinese transfer 1j was prepared in the same manner using peripherally produced gardenia pigment (7). Each raw Chinese noodle costs 19.2 yen when 10 samples are crushed and mixed in 1 part water and 90 parts filtered water. Can you simply wrap these raw Chinese noodles and leave them at room temperature? Y L , the change in its color tone was observed [1/2/ζ].

2 As shown in Table 2, unrefined gardenia pigment-added area "4 sheets,
711111: Change in color tone was 1 twist, but no change in color tone was observed even after 911 after addition of purified gardenia pigment.

Claims (1)

[Claims] A method for stably coloring food products using wheat flour, characterized in that a porous adsorption resin is used to add a fractionated and purified gardenia pigment.