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Detection method for specific radiolysis product of fat-containing food treated by ionizing radiation exposure

A radiation exposure and detection method technology, applied in the field of gas chromatography-mass spectrometry detection, can solve problems such as limitations, no relevant laws and regulations, no detection standards or method research work, and achieve high sensitivity, good versatility, Effects of treatment to prevent illegal radiation exposure

Inactive Publication Date: 2010-08-04
ANIMAL & PLANT & FOOD INSPECTION CENT OF TIANJIN ENTRY EXIT INSPECTION & QUARANTINE BUREAU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, thermoluminescence and light-stimulated luminescence are currently widely used detection methods for radiation-irradiated food. According to the mixed silicate impurities in food, they can store radiation-irradiated processing energy and release energy under heat and light stimulation. However, these methods are currently not suitable for raw meat due to the limitation of the amount of silicate contained in the food.
[0005] Regarding the detection of radiation-irradiated food, the European Union has promulgated 10 standards, covering almost most of the detection methods; the International Codex Alimentarius Commission has adopted the EU standard as the current standard; The Ministry of Agriculture of my country has also promulgated the thermoluminescent detection standard, but there are no relevant laws and regulations in my country for the detection methods of other radiation-irradiated food, and there is no corresponding research work on detection standards or methods

Method used

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  • Detection method for specific radiolysis product of fat-containing food treated by ionizing radiation exposure
  • Detection method for specific radiolysis product of fat-containing food treated by ionizing radiation exposure
  • Detection method for specific radiolysis product of fat-containing food treated by ionizing radiation exposure

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Experimental program
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Effect test

Embodiment 1

[0038] Prepare a suitable concentration of 2-DCB standard solution and measure it on GC / MS.

[0039] Gas chromatography conditions:

[0040] DP-1701MS chromatographic column, 30m×0.25mm (inner diameter), 0.25μm (film thickness). Column temperature: initial temperature 60°C, keep for 1min, increase temperature to 300°C at 15°C / min, keep for 5min; carrier gas: high-purity helium 99.999%, 1.0mL / min; inlet temperature: 250°C. Injection volume: 1 μL.

[0041] Mass Spectrometry Conditions:

[0042] Interface temperature: 280°C; ion source: electron bombardment source (EI); electron energy: 70eV; ion source temperature: 230°C; detection method: SIM. (see attached figure 2 , 3 )

[0043] Example 2: Detection of Radiation Irradiation Processed Chicken Samples

Embodiment 2

[0044] 1. Extraction of fat

[0045] Chicken samples were initially minced and homogenized with a blender.

[0046] Take 20g chicken sample and place it in a glass centrifuge tube, and heat it in a water bath at 50°C. A small amount of water (2-5 mL) may be added during this process to facilitate phase separation. While heating, stir occasionally with a glass rod until the oil phase is completely in solution.

[0047] The heated homogeneous mixture was centrifuged at 900 g for 10 min, and then the upper oil phase was absorbed with a straw, taking care not to stir the lower water phase (otherwise, re-centrifugation was required). If the amount of fat extracted is too small, stir the solid phase (meat) with a glass rod, and repeat the above heating and centrifugation process.

[0048] 2. Purify

[0049] Dissolve 1 g of fat with 1 mL of n-eicosane solution. About 20 g of deactivated florisil were loaded into a chromatographic column, which was used to separate HC. Quantitat...

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Abstract

The invention provides a rapid, sensitive, determination-accurate and operation-easy detection method for food treated by ionizing radiation exposure. The method comprises the extraction of fat in a sample; determination of fat content in the extract liquid to fix the processing amount of the fat; purification of the extract through Florisil column chromatography; and detection of the specific radiolysis product produced in the fat-containing food after ionizing radiation exposure by using a gas chromatograph-mass spectrometer. The method is suitable for fat-containing foods such as chicken, pork and the like, especially raw meat foods with high flat content.

Description

technical field [0001] The invention relates to a detection method for food irradiated by ionizing radiation, in particular to a gas chromatography-mass spectrometry detection method for specific radiolysis products of fat-containing food irradiated by ionizing radiation, belonging to the field of food detection. Background technique [0002] Food radiation treatment is a food processing and food preservation technology. It irradiates grain and other foods with a certain dose of ionizing radiation, and uses the resulting physical, chemical, biological and physiological changes to kill insects, sterilize, inhibit germination and delayed maturation, etc. The temperature, appearance, shape and internal properties of the irradiated food are practically unchanged, thus maintaining the original characteristics of the food. The food processed by radiation irradiation has high hygienic quality and can be stored for a long time under normal temperature and general conditions. Pests...

Claims

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Application Information

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IPC IPC(8): G01N30/02G01N1/44G01N1/28G01N30/06
Inventor 宓捷波
Owner ANIMAL & PLANT & FOOD INSPECTION CENT OF TIANJIN ENTRY EXIT INSPECTION & QUARANTINE BUREAU
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