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Irradiation method for reducing mercury ion valence state in refrigerated livestock, poultry and fish

A mercury ion and irradiation technology, which is applied in the field of radiation processing, can solve the problems such as the content of positive divalent mercury ions exceeds the standard, and achieve the effects of improving safety, simple process, and improving hygienic quality

Inactive Publication Date: 2012-07-11
宁波超能科技股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem that the content of positive divalent mercury ions in frozen livestock, poultry and fish meat exceeds the standard, the invention discloses an irradiation method for reducing the valence state of mercury ions in frozen livestock, poultry and fish meat, and degrades and reduces positive divalent mercury ions in livestock, poultry and fish meat to For positive monovalent mercury ions or mercury elements, the total degradation rate [total degradation rate=(positive divalent mercury ions before irradiation-positive divalent mercury ions after irradiation) / positive divalent mercury ions before irradiation] is 30-50%, To overcome the defects in the prior art that affect food safety due to the excess of positive divalent mercury ions

Method used

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  • Irradiation method for reducing mercury ion valence state in refrigerated livestock, poultry and fish
  • Irradiation method for reducing mercury ion valence state in refrigerated livestock, poultry and fish
  • Irradiation method for reducing mercury ion valence state in refrigerated livestock, poultry and fish

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Embodiment 1

[0031] as attached figure 1 Shown, a kind of irradiation method that reduces the valence state of mercury ion in frozen livestock and poultry fish, comprises the following steps:

[0032] Step S101, packaging the original frozen livestock, poultry and fish meat with excess positive divalent mercury ion residues;

[0033] Step S102, use 60 Co gamma ray or 10MeV electron beam irradiation, the total irradiation dose is 6-30kGy, and the unevenness of irradiation dose is less than 1.25;

[0034] Step S103: Detect the residual amount of positive divalent mercury ions in the original frozen livestock, poultry and fish meat irradiated in step 2. If it is higher than the standard value, repeat step 2 under the premise that the total irradiation dose does not exceed 30 kGy until positive divalent mercury ion Ion residues are equal to or lower than the standard value.

Embodiment 2

[0036] Electron beam irradiation -18 ℃ frozen beef:

[0037] as attached figure 2 As shown, positive divalent mercury ions (Hg 2+ ) residual amount (calculated by total mercury, the same below) is 0.08mg / kg, packed in polyethylene plastic bags, 1kg for each inner package, the total thickness (i.e. height) of the outer packing box shall not exceed 10cm, and the length and width shall not exceed 50cm, the total weight does not exceed 15kg. The irradiation conditions are irradiating with 10MeV electron beams, the dose rate is 5kGy / min, the absorbed dose is 8kGy, the unevenness of the irradiation dose is 1.25, the air temperature in the irradiation room is controlled below 20°C, and the whole irradiation process is within 2 hours After completion, after irradiation, put it into a freezer at -18°C for detection, in which positive divalent mercury ions (Hg 2+ ) if the residual amount falls below 0.05mg / kg, it meets the requirements of GB2762-2005 national standard; if it does not ...

Embodiment 3

[0039] 60 Co irradiated -18°C frozen fish (shrimp) meat:

[0040] as attached figure 2 As shown, positive divalent mercury ions (Hg 2+ ) with a residual amount of 0.20 mg / kg, and it is usually packed in polyethylene plastic bags (or vacuum packed). The size and weight of the inner packaging can be according to the requirements of the manufacturer, there is no specific regulation, but the outer packaging is kept in a foam plastic box, and its size and specification should meet the requirements of the manufacturer. 60 Co transfer irradiation box is required to improve 60 Co energy utilization rate, the air temperature in the irradiation room is controlled below 20°C, and the irradiation process is completed within 12 hours. Since the irradiation process takes more than 2 hours, insulation measures must be taken to ensure that the product temperature is below -18°C to prevent accidents. Temperature rises lead to product failure. The first irradiation process dose is 8kGy, a...

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Abstract

The invention discloses an irradiation method for reducing mercury ion valence state in refrigerated livestock, poultry and fish, comprising the followed steps: a step 1, packaging original refrigerated livestock, poultry and fish containing Hg2+ residual of exceeding standard; a step 2, irradiating with 60 Co gamma ray or 50-10MeV electron beam ray, wherein the irradiation accumulated dose is 6-30 kGy, and the ununiformity of the radiation dose is less than 1.25; and a step 3, detecting the Hg2+ residual quantity of the original refrigerated livestock and poultry livestock, poultry and fish after irradiated in the step 2, repeating the step 2 if the detecting result is higher than the standard value until equal to or lower than the standard value. The method of the invention has a simple process, effectively reduces the Hg2+ residual in livestock, poultry and fish, and enhances foodstuff security; and simultaneously, the method can kill all or the great mass of microbe, and kill the pathogenic bacteria, thereby avoiding food borne diseases, further raising foodstuff health quality, and increasing foodstuff value.

Description

technical field [0001] The invention relates to a radiation processing technology in the application field of atomic energy science and technology, in particular to an irradiation method for reducing the valence state of mercury ions in frozen livestock, poultry and fish. Background technique [0002] Mercury (Hg) is widely found in cinnabar, calomel and other mercury-containing ores in nature. It is the only liquid metal at room temperature. It can dissolve gold, silver, tin, potassium, sodium and other elements to form alloys. Mercury is commonly used in various barometers, thermometers, mercury lamps and red mercury water for disinfection. Due to a large number of applications in production and life, mercury waste liquid inevitably produces mercury ions (Hg 2+ ) environment pollution, mercury ions enter crops through water, soil, gas, raw materials, and rocks, and then enter food animals through feed, so that the mercury ion content in livestock, poultry, and fish is too...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23L1/025A23L5/30
Inventor 施惠栋谢宗传
Owner 宁波超能科技股份有限公司
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