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Product irradiation dose determination method

A technology of radiation dose and measurement method, which is applied in the fields of measuring γ, calculating product radiation dose, electron beam and X-ray product radiation dose, and can solve the problem that the radiation dose cannot be given, that it cannot be remedied after the event, and that it cannot be obtained. And other issues

Active Publication Date: 2017-04-26
JIANGSU ACAD OF AGRI SCI
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  • Claims
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AI Technical Summary

Problems solved by technology

[0005] Disadvantages of this method: First, dosimeters are deployed before irradiation to track the entire irradiation process of the product, which cannot be remedied afterwards; second, a dosimeter can only represent one site, and if some sites are not easy to deploy dosimeters or Inaccurate placement or broken or missing dosimeters will not give desired results
Patent CN101241089A discloses an irradiated product identification method based on the ESR method, which can only qualitatively detect whether it is irradiated or not, and cannot give the radiation dose

Method used

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  • Product irradiation dose determination method
  • Product irradiation dose determination method

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Experimental program
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Effect test

Embodiment 1

[0064] Embodiment 1. Routine measurement of radiation absorbed dose of gloves (packed in cartons).

[0065] 1. First establish a standard curve:

[0066] ①The paper is taken from 2 glove cartons and cut into 2×6 pieces of 10×10cm 2 size sample, the CO 60 Gamma irradiation upper irradiation (1.25MeV), dose setting 0, 8, 16, 24, 36, 44kGy;

[0067] ②The moisture content of the paper was determined to be 8.7%, and the temperature of the irradiation room was 24°C;

[0068] ③ After the irradiation is completed, extract the paper material from the inner side of the paper block, weigh 100mg, roll it into a straight tube, insert it into the ESR test tube along the tube wall, push it into the bottom of the tube with a fork-shaped stainless steel spatula, and compact it to make the sample The height is less than 3cm;

[0069] ④ESR measurement: ESR measurement was completed on the 10th day, and the working conditions of the instrument were: X-band 9.8GH, power 20mW; central magnetic ...

Embodiment 2

[0076] Embodiment 2. Determination of radiation absorbed dose of pet food (carton packaging).

[0077] 1. First establish a standard curve:

[0078] ①The paper is taken from 4 pet food cartons and cut into 4×7 pieces of 10×10cm 2 Large and small samples, irradiated on the electron accelerator (10.0MeV), the dose setting is 0, 1.5, 4, 6, 8, 12, 24kGy;

[0079] ②The moisture content of the paper is determined to be 10.0%, and the temperature of the irradiation room is 40°C;

[0080] ③ After the irradiation is completed, extract the paper material from the inner side of the paper block, weigh 300mg, roll it into a straight tube, insert it into the ESR test tube along the tube wall, push it into the bottom of the tube with a fork-shaped stainless steel shovel, and compact it to make the sample The height is less than 3cm;

[0081] ④ESR measurement: ESR measurement was completed on the third day, and the working conditions of the instrument were: X-band 9.85GH, power 5.024mW; ce...

Embodiment 3

[0087] Embodiment 3, the radiation absorbed dose determination of medical dressing (carton packaging).

[0088] 1. First establish a standard curve:

[0089] ①The paper materials are taken from 4 medical dressing cartons and cut into 4×5 pieces of 10×10cm 2 Large and small samples are irradiated on the X-ray target (5.0MeV), and the dose is set to 0, 8, 12, 16, 24kGy;

[0090] ②The moisture content of the paper is determined to be 8.0%, and the temperature of the irradiation room is 38°C;

[0091] ③ After the irradiation is completed, extract the paper material from the inner side of the paper block, weigh 250 mg, roll it into a straight tube, insert it into the ESR test tube along the tube wall, push it into the bottom of the tube with a fork-shaped stainless steel shovel, and compact it to make the sample The height is less than 3cm;

[0092] ④ESR measurement: ESR measurement was completed on the third day, and the working conditions of the instrument were: X-band 9.8GH, ...

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Abstract

The invention discloses a product irradiation dose determination method. The method comprises the following steps: (1) a standard curve for an ESR signal specific strength and a product irradiation dose is built: multiple groups of paper samples are taken, an accurate dose of irradiation is carried out respectively according to a dose increment method, an ESR signal of each paper sample is then determined, and a linear regression equation: D=kdeltaI+De is acquired; (2) the irradiation dose value is calculated: paper or a product packaging box through irradiation processing is taken, a paper sample is extracted, the ESR signal is determined, the specific strength increment deltaI is calculated, and the specific strength increment deltaI is finally substituted to the above equation to obtain the irradiation dose value. The method does not need to arrange a dosimeter to track the whole irradiation process of the product before irradiation processing, and the problem that the dosimeter is broken or lost does not happen; as for thousands of boxes of products, a large amount of manpower and detection fee can be saved; and the method can replace a working dosimeter to a certain degree for daily quality control on an irradiation product, and is particularly suitable for quality pre-judgment on products after irradiation disinfection by food and medical article enterprises.

Description

technical field [0001] The present invention relates to product radiation quality control technology in radiation processing, especially a technology for measuring the radiation dose of gamma, electron beam and X-ray products, specifically a method for calculating product radiation by measuring ESR signals in paper Method of radiation dose. Background technique [0002] Irradiation technology refers to the use of high-energy rays (γ, electron beams and X-rays) to irradiate food, medical supplies, chemical materials and "three wastes" to achieve the purpose of product preservation, disinfection and modification. It has many advantages such as no temperature rise, no environmental pollution, no preservative residue, fast, no need to open the package, and convenient industrial production. In irradiation processing and production, the quality control of product irradiation is realized through the monitoring of radiation dose value. [0003] The commonly used dose quantitative ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01T1/02
CPCG01T1/02
Inventor 赵永富汪敏李俐俐
Owner JIANGSU ACAD OF AGRI SCI
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