Method for rapid nondestructive test of irradiated food

A technology for irradiating food and non-destructive testing, applied in measuring devices, material analysis by optical means, instruments, etc., can solve the problems of high professional requirements of operators, difficult sample identification, low detection efficiency, etc., to promote healthy development. , The effect of fast analysis and high work efficiency

Inactive Publication Date: 2016-12-07
BEIJING ACADEMY OF AGRICULTURE & FORESTRY SCIENCES
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Problems solved by technology

[0004] For the identification of irradiated food, the current existing technology is mainly based on isotope analysis, but this method has many problems such as cumbersome operation, long time consumption, high professional requirements for operators, and low detection efficiency, and it is difficult to adapt to the identification of a large number of samples. need

Method used

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  • Method for rapid nondestructive test of irradiated food
  • Method for rapid nondestructive test of irradiated food
  • Method for rapid nondestructive test of irradiated food

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Follow the steps below for rapid and non-destructive identification of white peanut samples 1# to 92# to be tested:

[0044] (1) Take the white peanut sample to be measured, and use a terahertz spectrometer in conjunction with an attenuated total reflection accessory to collect its terahertz refractive index spectrum data; perform standard normal variable transformation preprocessing on the terahertz refractive index spectrum;

[0045] (2) Extracting the characteristic frequency ν respectively from the preprocessed terahertz refractive index spectrum data 1 (0.6027THz) and the characteristic frequency ν 2 (1.4038THz) corresponding characteristic data R 1 , R 2 ;

[0046] (3) Put the ν 1 、ν 2 and R 1 , R 2 Substitute into formula I, calculate characteristic value;

[0047]

[0048] When the eigenvalue is less than or equal to 0, it is judged that the sample is 60 Irradiated peanuts treated with Co and with an absorbed radiation dose of not less than 1 kGy;

...

Embodiment 2

[0059] According to the method provided in Example 1, the white peanut samples 93#~184# to be tested are quickly and non-destructively identified; compared with Example 1, the difference is only: characteristic frequency ν 1 =0.3815THz, characteristic frequency ν 2 = 1.0605 THz.

[0060] See Table 2 for the terahertz refractive index spectrum values ​​and identification results of white peanut samples 93#~184# at characteristic frequencies.

[0061] Table 2: Terahertz refractive index spectrum values ​​and identification results of white peanut samples 93#~184# at characteristic frequencies

[0062]

[0063]

[0064]

[0065]

[0066] It can be seen from Table 2 that among the 92 samples of white peanuts to be tested from 93# to 184#, the actual situation of samples 93# to 138# is 60 Irradiated by Co radioactive sources, the actual situation of 139#~184# samples is that they have not been irradiated 60 Irradiation of Co radioactive sources. According to the sta...

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Abstract

The invention relates to a method for rapid nondestructive test of irradiated food. The method comprises the following steps: (1) terahertz refractive index spectrum data of a sample to be tested are acquired; (2) characteristic data R1 and R2 which are respectively corresponding to a characteristic frequency v1 and a characteristic frequency v2 are extracted from the terahertz refractive index spectrum data; (3) characteristic values including v1, v2, R1 and R2 are calculated, and whether the sample is irradiated food is judged according to the characteristic values. The rapid nondestructive test method of the irradiated foodstuff extends applications of vibrational spectrum to the field of deteriorated foodstuff identification; the method has the characteristics of fast analysis speed, high accuracy, high working efficiency, environmental protection without pollution, and the like; the method provides powerful guarantee and technical support of rapid nondestructive identification of deteriorated foodstuff, and has active effects and reference meanings for guarantying quality and safety of foodstuff, promoting healthy development of foodstuff market, researching and developing rapid nondestructive testing instruments, and other aspects.

Description

technical field [0001] The invention relates to the field of food quality and safety, in particular to a rapid and nondestructive detection method for irradiated food. Background technique [0002] Food is an important substance that human beings depend on so far. With the development of productivity and social progress, the attention to food quality and safety is increasing day by day. Food quality and safety includes two aspects. One is quality, that is, whether the content of nutrients is up to standard and whether the flavor is good; the other is safety, that is, whether there are physical, chemical, biological and other substances that are harmful or potentially harmful to human health. possible factors. [0003] With the development of modern industry, food processing technology continues to improve, and some processing methods are widely used. Taking irradiation as an example, it has been widely used in the sterilization, insecticide and antiseptic treatment of sea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/3563G01N21/3586
CPCG01N21/3563G01N21/3586
Inventor 王冬马智宏陈早艳潘立刚王纪华
Owner BEIJING ACADEMY OF AGRICULTURE & FORESTRY SCIENCES
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