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Purified cochineal and method for its production

a cochineal and purification technology, applied in the field of cochineal purification, can solve the problems of limited color concentration, sedimentation of conventional cochineal colors, and type and application of products

Inactive Publication Date: 2002-05-16
SAN EI GEN F F I
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

0024] (16) A process for producing a cochineal color as defined in paragraph (7) or (8) wherein the membrane treatment is carried out using a membrane having a cut-off molecular weight of 2000.

Problems solved by technology

Further, the use of cochineal colors produced by conventional methods poses problems that the types and applications of the products, and the usage concentration of the color are limited due to the odors probably attributable to the above raw material.
Another problem is also pointed out that the conventional cochineal colors tend to form a sediment with time since they contain proteins and like contaminants derived from the above raw material.

Method used

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  • Purified cochineal and method for its production

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0072] (1) Preparation of Cochineal Color and a Colorant Product

[0073] To 35 kg of the dry powder of the insect Coccus cacti L. was added 800 L of water adjusted to pH 7.5 with sodium hydroxide and the cochineal color was extracted at 90.about.100.degree. C. with stirring for 20.about.30minutes. The extract solution was passed through a 60-mesh metal sieve for solid-liquid separation and the liquid phase (cochineal extract solution) was adjusted to pH 4 with citric acid and cooled to about 50.degree. C. At this stage, 0.1% of protease was added and the mixture was stirred at that temperature for 3 hours. Then, the protein hydrolysate obtained was adjusted to pH 3 with citric acid, mixed with the filter aid and diatomaceous earth, and filtered through filter paper to recover about 250 L of the protein hydrolysate. This cochineal protein hydrolysate was run onto a column packed with the adsorbent resin Amberlite XAD-7 (150 L) to adsorb cochineal color. After the resin column was washe...

example 2

[0083] To 24 kg of the cochineal colorant product with a color value of E.sup.10%.sub.1 cm=60 as prepared in Example 1 was added 156 kg of water, and 8 kg of tartaric acid, 9.3 kg of burnt alum and 0.6 kg of slaked lime (calcium hydroxide) were dissolved in the resulting color liquor (pigment solution). Then, under stirring, the temperature was raised to 80.degree. C. and held at this level for 5 hours, whereby a water-insoluble cochineal aluminum lake (carmine) was obtained. This aqueous suspension of carmine was filtered with a filter press (Yabuta Co.) to recover a carmine cake, which was then dried in vacuo at 50.degree. C. and crushed to prepare a carmine powder.

[0084] Protein analysis of this carmine by the same method of electrophoresis as in Example 1 showed no evidence of protein. It was, therefore, clear that a carmine substantially free of proteins as potential allergens can be prepared by the method described in Example 1.

[0085] In this connection, according to the findi...

example 3

[0086] The cochineal colorant product with a color value of E.sup.10%.sub.1 cm=60 prepared in Example 1 was examined for the presence of an odor. More specifically, 5 g of the cochineal color product was diluted with water to thereby prepare 1 L of a solution with a color value of E.sup.10%.sub.1 cm=0.3. The resulting solution was heated to the temperature of 50.degree. C. and then evaluated for its odor based on the judgments made by a panel of 10 highly-trained specialists. As a comparative sample for the evaluation were used a cochineal extract (pH 7.5) obtained from the dry powder of the insect Coccus cacti L. by a water extraction following the procedures of Example 1 (comparative color 1) and a cochineal color prepared by further subjecting the cochineal extract obtained by the water extraction to resin adsorption treatment (comparative color 2). The comparative samples were used for the evaluation of odors after diluted in the same manner as described above to prepare a solut...

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Abstract

The invention provides a cochineal color, a colorant product containing the cochineal color and the method of its production, wherein the cochineal color is free of allergenic proteins and contaminants derived from the raw material Coccus cacti L. insect and can be added with safety to products taken by mouth, such as foods, pharmaceutical products, etc. The invention relates to a cochineal color substantially free of proteins of molecular weight not less than 6000. The invention also relates to a process for producing a cochineal color which comprises subjecting a cochineal extract solution to proteolysis and then to at least one treatment selected from the group consisting of adsorption treatment, ton exchange treatment, acid treatment, extraction treatment and membrane treatment.

Description

[0001] This invention relates to the cochineal color characterized by its being so pure as to be substantially allergen-free and to a coloring composition comprising the color. Furthermore, this invention relates to a method of producing said cochineal color of high purity and free of allergens.[0002] Cochineal in broad use as a coloring agent, for example in pharmaceutical products and foods, is derived from the red coloring matter occurring in the female insect bodies of Coccus cacti L. which grows on Nopalea coccinellifera and other plants of the family Cactaceae cultivated in the desert areas of Mexico and Central and South America. As such, cochineal is harvested from said insect by extracting its dried bodies with water or alcohol.[0003] It has been reported, of late, that being an insect-derived substance, cochineal contains allergenic impurity proteins and as such may be an etiologic factor in allergic diseases (Ann Allergy Asthma, Vol. 84(5), 549-552, 2000.).[0004] Further,...

Claims

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Application Information

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IPC IPC(8): C09B61/00
CPCC09B61/00
Inventor ICHI, TAKAHITOKODA, TAKATOSHIYUKAWA, CHIYOKISAKATA, MAKOTOSATO, HIROYUKI
Owner SAN EI GEN F F I
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