JP2002034519A - Method for preventing cuttlefish or octopus from browning or blackening - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for preserving a cuttlefish or an octopus in a state of a fresh color for a long period by preventing browning or blackening. SOLUTION: A raw cuttlefish or a raw octopus is treated with an alkaline aqueous solution and the alkaline aqueous solution sticking to the treated cuttlefish or octopus is then washed or neutralized.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a method for preventing browning or blackening of raw squid or octopus or a method for preparing such squid or octopus which is prevented from browning or blackening.
In addition, the present invention relates to a method for preparing squid or octopus having improved storage stability and a method for preparing squid or octopus having improved storage stability.

[0002]

2. Description of the Related Art For example, squid or octopus is caught on a boat at a fishing ground and then wholesaled through a market, retailed at a supermarket or a fish shop, or squid or octopus captured at a fishing ground. Usually, in factories, etc., after sterilization with sodium hypochlorite or the like, or treatment with a chemical such as phosphate to improve the water retention, they are usually wholesaled to restaurants and the like. Squid has a transparent color in its live state and produces a color change for a protective color. After death, however, the color of the squid changes from transparent to white and, over time, from white to gray. In addition, the octopus also has a white section of the body surface on the side that is not visible, and a cross section of the body part such as a cut leg, after death,
Over time, it changes to gray. This change in color is associated with a change or alteration in the material, producing an unpleasant odor from the body surface in response to a change in color from white to gray. It is thought that this is caused by the bacteria attached to the surface of the captured squid or octopus and the protein is decomposed from the body surface. Squid or octopus that is as fresh as possible without browning or blackening (live or
In spite of the strong demand to eat squid or octopus in the fresh form, except for the case of obtaining it alive without browning or blackening, It was impossible to provide.

[0003] Therefore, these squids or octopuses need to be retailed or wholesaled as much as possible in order to keep them fresh. However, it is difficult to transport the captured squid or octopus as it is and preserve it in such a living state until the time of sale, and equipment for this is necessary, and complicated work is required to maintain the state. Often required. For this reason, there has been a demand for a method which can maintain the color of fresh squid or octopus at the time of capture simply and simply.

[0004]

Accordingly, an object of the present invention is to provide a squid or octopus which effectively prevents browning or blackening and has a fresh color at or near the time of capture. Another object of the present invention is to provide a squid or an octopus that prevents deterioration and has excellent storage stability.

[0005]

Means for Solving the Problems As a result of intensive studies to solve the above-mentioned problems, the present inventor has treated raw squid or octopus with an aqueous alkali solution and then washed the aqueous alkali solution, or The inventors have found that the above object can be effectively achieved by neutralization, and have reached the present invention.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail.
To the squid to which the present invention is applied, for example, hinika, watermelon, spear squid, squid squid, squid, firefly squid, dos watermelon, daioika, squid, sodica,
Various squids such as Mongo squid are preferred. Various types of octopus can be used without particular limitation. As such octopus, for example, octopus, octopus, octopus, octopus and the like are preferably mentioned. The squid or octopus to which the present invention is applied may be live or dead. Especially when applied to dead squid or octopus, the effect is great. If it is alive, it is unlikely that discoloration or the like will occur. However, if there is a high possibility of death during transportation, it is appropriate to perform the above-described processing while alive. However, although squid or octopus may die in the course of this process, since the above process is performed, there are few problems such as discoloration thereafter.

[0007] The squid or octopus applied to the present invention may be the one that has been frozen and stored or chilled immediately after being captured on a ship or the like and then thawed. However, it is most preferable to apply it immediately to what has been caught on board. In the present invention, squid or octopus is first treated in an aqueous alkaline solution. This treatment can be performed, for example, by dipping in an alkaline aqueous solution or spraying with an alkaline aqueous solution.

As the alkaline aqueous solution to be used, for example, a solution in which an alkaline agent is dissolved in water can be used. As the alkali agent, various alkali agents can be used as long as they can impart alkalinity to the aqueous solution. Examples of such an alkaline agent include sodium hydroxide, potassium hydroxide, calcium hydroxide, disodium hydrogen phosphate, trisodium phosphate, dipotassium hydrogen phosphate, tripotassium phosphate, diammonium hydrogen phosphate, sodium polyphosphate, Examples include potassium polyphosphate, calcium oxide, calcium phosphate, magnesium carbonate, ammonium carbonate, sodium carbonate, potassium carbonate, calcium carbonate, sodium hydrogen carbonate, potassium hydrogen carbonate, and the like. These alkaline agents may be used alone or as a mixture.
Examples of these alkaline agents include readily available materials such as calcium carbonate and sodium carbonate.

In the treatment with an alkaline aqueous solution, squid or octopus may be frozen or frozen with the immersion in the solution. In such a case, the subsequent washing or neutralization can also be performed by immersing in water or an acidic solution or the like when thawing at a factory or the like after freezing or frozen transportation. The pH of the alkaline aqueous solution may be higher than 7.0. For example, in order to ensure prompt processing, a higher pH value is preferable. For example, the pH value is usually between 7.5 and 13.
0, preferably 8.5 to 13.0, particularly preferably 9.5 to 1
2.0 is preferred. The treatment time with the alkaline aqueous solution is
Usually, it fluctuates depending on the processing temperature. Usually, the treatment time is usually 1 minute to 24 hours, preferably 15 minutes to 1 hour.

The treatment temperature is usually from 0 to 10 ° C., preferably from 0 to 5 ° C. If the processing temperature is lower than 0 ° C., the squid or octopus is less likely to be contaminated by various bacteria, but the processing time is longer. On the other hand, processing temperature is 10 ℃
If it exceeds, the denaturation or degradation of the protein is accelerated,
There is a problem that a person easily loses his body. In addition, if necessary, for example, a saccharide or a salt (for example, sodium chloride) may be added to the alkaline aqueous solution in order to improve the permeability of the alkaline aqueous solution into the material. Various saccharides can be used as the saccharide used, and examples thereof include reduced maltose, sorbitol, and sucrose.

The alkali-treated material is treated immediately or after an arbitrary treatment, and then the squid or octopus is washed with an aqueous alkali solution attached to the surface thereof,
Or neutralize. The washing time varies depending on the time of the alkali treatment, but is usually 1 minute to 24 hours, preferably
30 minutes to 3 hours are appropriate. Washing can be performed with tap water or with salt water, for example, 1 to 6%, preferably 1 to 4% salt water. In the latter case, the body of the squid or octopus to be treated is tight, and preferably,
It is also effective as a pretreatment for boiling. The neutralization process
For example, by spraying an acidic solution onto the alkaline processing material,
The treatment can be performed by immersion in an acidic solution.

As the acidic solution, for example, an aqueous solution of an inorganic acid such as hydrochloric acid, sulfuric acid or nitric acid, or an organic acid such as acetic acid, sulfonic acid or citric acid can be used. Preferred acids are, for example, acetic acid and citric acid. When spraying, the pH is usually 4.0 to 6.6, preferably,
5.0 to 6.5. The pH of the acidic solution for immersion is suitably, for example, 4.0 to 6.8, preferably 5.5 to 6.5. Neutralization may be performed as acidic in salt water.
In this case, the salt water concentration is, for example, 1 to 10% by mass, preferably 3 to 8% by mass. The neutralization temperature is preferably, for example, in the range of about 5 to 15 ° C.

[0013] The neutralization time can vary depending on the alkali treatment time, but is usually from 10 minutes to 2 hours, preferably from 30 minutes to 1 hour. The neutralized squid or octopus may be weakly acidic as measured by the pH of the water on the body surface.
In the present invention, the squid or octopus that has been washed or neutralized in this manner can then be packaged and stored frozen or chilled in the packaged state. Also,
The washed or neutralized squid or octopus may be further boiled in salt water or the like. According to the present invention, squid or octopus is treated with an aqueous alkali solution, and then washed or neutralized to preserve frozen, chilled, or even stored for a long period of time, browning or blackening. The squid or octopus product having a color close to that at the time of fresh capture can be prepared. In addition, the squid or octopus that has been subjected to the above treatment can retain the color after the treatment for a long period of time without causing browning or blackening even if it is subsequently boiled or dried in the sun.
In addition, since the squid or octopus treated in this way has very little deterioration, even when stored for a long period, the generation of off-flavors is reduced.

[0014] By treating the squid or octopus with an aqueous alkali solution, the bacteria attached to the squid or octopus can be substantially killed. Therefore, the squid or octopus that has been treated according to the present invention does not substantially lose its body during storage or the time required to cause squid is greatly extended. Can be easily transported far away, and the treated squid or octopus can be stored for a longer period of time than before, so that the yield is greatly improved, and the squid or octopus is freshly prepared for general consumers. It becomes possible to eat.

[0015]

The present invention will be described in more detail with reference to the following examples. Example 1 (Prevention of browning or blackening of watermelon) An alkaline treatment liquid having the following composition was prepared. Sodium acetate (buffer) 38% Calcium oxide (alkali agent) 30% Glucose (penetrant) 32% Dissolve 10 g of the above alkaline treatment solution in water, and add 1000 ml of an alkaline aqueous solution of 0.3% calcium oxide, pH 11 Prepared. After purchasing raw watermelon (from Sanin Senzaki) (body color is transparent) at a supermarket, it was immediately immersed in the above alkaline aqueous solution at about 5 ° C. for 1 hour with appropriate stirring.
Next, the soaked watermelon is taken out, washed once with running water, and then immersed in 2000 ml of water at about 5 ° C. for 30 minutes.
Washed with water. The water-washed watermelon was then drained, put in a polypropylene bag, evacuated, closed the opening, refrigerated at 5 to 10 ° C (case A1), and stored at 26 to 33 ° C. Room temperature storage (case B1) was performed, and the change in body color and the degree of deterioration were observed.

As a comparative example, a comparative watermelon product was prepared in the same manner as in Example 1 except that the above-mentioned alkaline aqueous solution treatment and washing or neutralization treatment were not carried out, put in a polypropylene bag, and evacuated. After that, the opening is closed, refrigerated at 5 to 10 ° C. (Case AC1), and 2
Room temperature storage at 6 to 33 ° C. (case BC1) was performed, and the degree of color change and deterioration were observed in the same manner as in Example 1. As a result, in case A1, the squid retained the white color at the beginning of storage for 9 days, and no formation of bubbles due to generation of gas was observed. In contrast, case AC
In 1, the white color at the beginning of storage became slightly gray on the third day after storage, and the change gradually increased.
On the ninth day, the whole was gray. On the sixth day,
Fine bubbles began to form, the size of the bubbles increased over time, and the amount of gas increased. And on the ninth day over time,
Considerable gas has accumulated in the bag.

In case B1, the white color at the start of storage was maintained until the fifth day, and then became slightly yellowish, but the color change thereafter was not observed until the ninth day. . Further, the generation of gas began to be observed as fine bubbles from about the fifth day, but no change was observed thereafter. On the other hand, Case BC
In the case of No. 1, it is already slightly yellowish at the beginning of storage,
With the elapse of the storage period, gray gradually entered yellow and its size began to expand, and on the ninth day, the whole became gray. In addition, fine bubbles are generated from the beginning of storage, the size of the bubbles increases with time, the amount of gas gradually increases,
On the fifth day, gas accumulates in the bag about twice the thickness of the squid, and this amount also increases. On the ninth day, the amount of gas is about 3 to 4 times the thickness of the squid. became. Further, in this case, after the fifth day, squid drooling occurred and increased, and when pressed with a finger, the squid collapsed.

Example 2 (Prevention of browning of Kensaki squid) Example 1 was repeated except that raw Kensaki squid (from Hakodate) (the body color was a transparent color) was used. As a comparative example, a comparative squid squid was prepared by performing the same treatment as in Example 2 except that the alkali treatment and the water washing treatment were not performed. The change in color and off-flavor of the treated and untreated squid squid was almost the same as that of the watermelon of Example 1 except that the change in color and off-flavor was about one day earlier than the time course of the aging of Example 1.

In each of the first and second embodiments, an example in which squid is used has been described. However, even in the case of using octopus, the change in the white color of the cross section of the foot and the generation of unpleasant odor are not particularly limited. Similar changes occurred as in cases 1 and 2.

[0020]

According to the method of the present invention, raw squid or octopus is treated with an aqueous alkali solution, and then the aqueous squid or octopus is washed or neutralized to remove the squid or octopus. Browning or blackening can be effectively prevented. In addition, such treatment significantly improved the long-term storage of squid or octopus.
Therefore, even after death, long-term preservation of squid or octopus in a state of fresh color, which has been considered impossible until now, has become possible.

Claims (2)

[Claims] 1. A method for treating raw squid or octopus with an aqueous alkaline solution, followed by washing or neutralizing the aqueous alkaline solution attached to the treated squid or octopus, Prevention method. 2. A method for preventing browning or blackening, characterized by treating raw squid or octopus with an alkaline aqueous solution, and then washing or neutralizing the alkaline aqueous solution attached to the treated squid or octopus. Squid or octopus.