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Frozen biocidal compositions and methods of use thereof

a biocidal composition and composition technology, applied in the field of frozen biocidal compositions, can solve the problems of exacerbate the original problem, high cost associated with the use of such known methods, and potentially hazardous materials that are generally difficult to produce and apply

Inactive Publication Date: 2005-08-04
ROSE DAVID C +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0008] The present invention provides biocidal compositions comprising a frozen aqueous solution containing a plurality of ions selected from the group consisting of halide and oxyhalide ions. More particularly, the present invention is directed to a frozen aqueous solution of a pH-buffered compositio

Problems solved by technology

For example, it is a potentially hazardous material that is generally difficult to produce and apply where needed.
Such compounds and methods have met with mixed success, and often exacerbate the original problem, due to the toxicity of such compounds and methods.
Another issue is the relatively high cost associated with the use of such known methods.

Method used

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  • Frozen biocidal compositions and methods of use thereof
  • Frozen biocidal compositions and methods of use thereof
  • Frozen biocidal compositions and methods of use thereof

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0042] A biocidal composition was prepared by mixing 4,727 g of sodium chlorite (31%) in 4 liters of deionized water. 842 g of sodium chloride and 142 g of sodium chlorate were then added to the aqueous mixture. 60 g of sodium sulfate and 60 g of sodium tetraborate decahydrate were then added and the mixture was stirred for approximately 15 minutes until all of the solids had dissolved. 43 g of hydrogen peroxide (35%) were then added and the solution was mixed for approximately five minutes. The pH of the mixture was adjusted to 8.5 by slowly adding monopotassium phosphate to the solution. The solution was filtered to remove any contaminants and / or sediment and the filtrate was collected for use as a biocidal material.

[0043] The resulting filtrate from the above steps had a specific gravity of 1.22. The chlorite ion was present in an amount of 10.9 weight percent (109,000 ppm). The chlorate ion was present in the amount of 1.11 weight percent (11,100 ppm) and the chloride ion was p...

example 2

[0044] The composition of Example 1 was diluted with potable water such that the sodium chlorite concentration was 122 ppm, and tested for effectiveness in preserving “fresh fish”, meaning the fish is not frozen into a block of ice after harvest. The treated water was frozen into ice blocks at temperatures consistent with industry standards. The ice was then chaffed to form crushed ice for application to fresh fish. All fish samples were haddock fillets and weighed at least one pound. The fish were divided into a test group and a control group. Each fish in the test group was washed with the composition of Example 1 diluted to 122 ppm sodium chlorite and each fish in the control group was washed with untreated water. Samples were taken from the fish to be cultured to determine microbial contamination prior to washing. The one-pound samples were then placed in a fashion as to allow the crushed ice to contact all surfaces of the fish. The control fish were contacted with ice formed fr...

example 3

[0046] The composition of Example I was diluted with potable water such that the sodium chlorite concentration was 245 ppm, and tested for effectiveness in preserving “fresh fish”, using the same method as described in Example 2. The results of this test are shown in FIG. 3. As shown in FIG. 3, the odor score did not fall below the acceptable value until about 25 days. Additionally, after 27 days the TMA value is only about half of the TMA value of the control fillets after 12 days as shown in FIGS. 3 and 1, respectively.

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Abstract

The present invention is directed to frozen biocidal compositions. Specifically, the biocidal compositions comprise a frozen aqueous solution of a plurality of ions selected from the group consisting of halide and oxyhalide ions. The frozen biocidal compositions are useful in preserving or extending the shelf-life of perishable articles.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS [0001] This application claims the benefit of Provisional Application Ser. No. 60 / 267,530, filed Feb. 9, 2001, which is incorporated herein by reference in its entirety.FIELD OF THE INVENTION[0002] The present invention relates to frozen biocidal compositions useful in preserving perishable articles and, in particular, frozen biocidal compositions comprising a sodium chlorite solution. BACKGROUND OF THE INVENTION [0003] The use of various chlorine-containing compounds as biocidal agents is known. The literature contains references to the use of chlorine gas, hypochlorites, and chlorine dioxide as materials that can be used to kill microorganisms. A number of patents teach that chlorine dioxide is an effective microbicide, and that it has powerful and effective oxidizing characteristics useful in killing various microorganisms when used in various applications, such as surface disinfecting, water treatment, wound healing, etc. However, chlorine...

Claims

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Application Information

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IPC IPC(8): A23B4/06A23B4/08A23B4/24A23B7/04A23B7/05A23B7/157A23L3/358A23L3/36A23L3/37
CPCA23B4/06A23B4/08A23B4/24A23B7/04Y10S514/97A23B7/157A23L3/358A23L3/36A23L3/37A23B7/05
Inventor ROSE, DAVID C.VENTURA, LAWRENCE J.
Owner ROSE DAVID C