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Rapid detection method for irradiated food

A technology for irradiating food and detection methods, which is applied in measurement devices, material analysis by optical means, instruments, etc., can solve problems such as affecting consumers' health, environmental pollution, and food quality degradation, and achieves a simple and easy data processing method. The effect of industrial and environmental friendly identification

Active Publication Date: 2016-02-17
尼尔软科(北京)科技有限公司
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Problems solved by technology

However, once lipid-rich foods are irradiated by ionizing radiation (abbreviated as "ionizing radiation" or "irradiation"), the fatty acids contained therein, especially unsaturated fatty acids containing double bonds, are extremely prone to breakage. The result is similar to oxidation, resulting in the decomposition of fatty acids, the deterioration of food quality, and even rancidity, which seriously affects the health of consumers
[0003] For the detection of whether food has been irradiated, the traditional method is to use isotope analysis, chromatography-mass spectrometry analysis, etc., which not only takes a long time to analyze, but also uses a large amount of chemical reagents during the analysis process, causing pollution to the environment

Method used

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  • Rapid detection method for irradiated food
  • Rapid detection method for irradiated food

Examples

Experimental program
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Embodiment 1

[0022] Example 1 Terahertz Absorption Coefficient Spectrum Analysis of Peanuts Before and After Irradiation and Rapid Nondestructive Testing of Samples to be Tested

[0023] Peanuts contain a lot of lipids. If irradiated to sterilize and kill insects, the chemical structure of lipids will be destroyed, causing fatty acid chains to break, food quality to decline, and adverse effects on consumers' health.

[0024] In this embodiment, a terahertz spectrometer is used to collect terahertz absorption coefficient spectral data of peanuts before and after irradiation respectively. The model and experimental parameters of the terahertz spectrometer used are as follows.

[0025] Instrument model: ADVANTESTTAS7500SP terahertz spectrometer;

[0026] Sampling method: attenuated total reflection method;

[0027] Frequency resolution: 0.0076THz;

[0028] Spectrum range: 0THz ~ 4THz;

[0029] Reference accumulation times: 2048 times;

[0030] Sample accumulation times: 2048 times;

[0...

Embodiment 2

[0042] Example 2 Analysis of terahertz refractive index spectrum before and after peanut irradiation and rapid nondestructive testing of samples to be tested

[0043] In this embodiment, a terahertz spectrometer is used to collect terahertz refractive index spectrum data for peanuts before irradiation and peanuts after irradiation. The model and experimental parameters of the terahertz spectrometer used are as follows.

[0044] Instrument model: ADVANTESTTAS7500SP terahertz spectrometer;

[0045] Sampling method: attenuated total reflection method;

[0046] Frequency resolution: 0.0076THz;

[0047] Spectrum range: 0THz ~ 4THz;

[0048] Reference accumulation times: 2048 times;

[0049] Sample accumulation times: 2048 times;

[0050] Phase angle: 0 degrees.

[0051] This embodiment prefers terahertz refractive index spectrum data, such as image 3 shown.

[0052] For the refractive index spectrum, the characteristic frequency 1 and the characteristic frequency 2 selecte...

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Abstract

The invention provides a rapid detection method for irradiated food. The rapid detection method for irradiated food is based on a terahertz spectrum technology, and comprises acquiring the terahertz spectrum of food with known irradiation status, analyzing the slope characteristic of a feature-point connecting line under the characteristic frequency of the food, then acquiring the terahertz spectrum of to-be-detected food under the same experiment conditions, and determining whether the to-be-detected food is irradiated by ionizing radiation generated by a radioactive source according to the slope characteristic of the feature-point connecting line of the to-be-detected food under the characteristic frequency. The method is capable of realizing rapid efficient environment-friendly identification on irradiated food, thereby providing important technological meaning for food safety monitoring, radioactive source safe usage and other aspects.

Description

technical field [0001] The invention relates to the field of food detection, in particular to a rapid detection method for irradiated food. Background technique [0002] The ionizing radiation produced by the radioactive source contains huge energy and destructive lethality, so it can be used in some food processing such as antisepsis, insect control, and sterilization. However, once lipid-rich foods are irradiated by ionizing radiation (abbreviated as "ionizing radiation" or "irradiation"), the fatty acids contained therein, especially unsaturated fatty acids containing double bonds, are extremely prone to breakage. The result is similar to oxidation, resulting in the decomposition of fatty acids, the decline of food quality, and even rancidity, which seriously affects the health of consumers. [0003] For the detection of whether food has been irradiated, the traditional method is to use isotope analysis, chromatography and mass spectrometry analysis, etc., which not only...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/3586
Inventor 王冬潘立刚马智宏李安靳欣欣贾文珅王纪华
Owner 尼尔软科(北京)科技有限公司
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