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Peanut variety nondestructive testing method based on nuclear magnetic resonance technology

A kind of nuclear magnetic resonance and non-destructive testing technology, applied in the direction of using nuclear magnetic resonance for analysis, etc., can solve the problems of inability to quickly detect peanuts, time-consuming and laborious, and achieve the effects of fast detection speed, improved detection efficiency, and low analysis cost.

Inactive Publication Date: 2016-10-12
DALIAN POLYTECHNIC UNIVERSITY
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Problems solved by technology

However, different varieties of peanuts have great differences in nutritional value and taste. The traditional method requires complex sample pretreatment (Soxhlet extraction) process in identifying the quality of peanuts, which is time-consuming and labor-intensive. Non-destructive rapid detection of varieties of peanuts

Method used

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  • Peanut variety nondestructive testing method based on nuclear magnetic resonance technology
  • Peanut variety nondestructive testing method based on nuclear magnetic resonance technology
  • Peanut variety nondestructive testing method based on nuclear magnetic resonance technology

Examples

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Effect test

Embodiment 1

[0033] Example 1: Identification of different varieties of peanuts from the same place of origin using nuclear magnetic resonance methods

[0034] Step 1: Take five different varieties of Shandong Linyi peanut samples harvested that year, Shandong Linyi Black Peanut (Shandong Black Peanut), Shandong Linyi Shrimp Peanut (Shandong Shrimp Peanut), Shandong Linyi Four Red Peanut (Shandong Four Red Peanut) ), Shandong Linyi Xiaobaisha Peanut (Shandong Xiaobaisha), Shandong Linyi Big Peanut (Shandong Big Peanut) as standard products, each 500g.

[0035] The peanuts selected in this example conform to the normal distribution law of the peanut population. Shandong black peanuts are black; Shandong four grains of red are bright red and shiny; Shandong shriveled peanuts are light red, and Shandong big peanuts are lighter than shriveled peanuts, and the grains are large and plump; Shandong Xiaobaisha is a slightly powdery white, such as figure 1 As shown, in order to facilitate the expe...

Embodiment 2

[0043] Example 2: NMR method is used to distinguish Jilin Baisha four red peanuts and Shandong Linyi four red peanuts

[0044] In this embodiment, Jilin Baisha four-grain red peanuts and Shandong Linyi four-grain red peanuts are selected as detection objects. Both kinds of four-grain red peanuts are bright red and shiny, and Jilin four-grain red peanuts are darker than those in Shandong, such as figure 1 shown.

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Abstract

The present invention is a non-destructive testing method for peanut varieties based on nuclear magnetic resonance technology. The specific steps are as follows: select a number of peanut samples, respectively perform nuclear magnetic resonance transverse relaxation scanning on the peanut samples through a CPMG sequence, and process them with a one-dimensional inverse Laplacian algorithm. Obtain the signal quantity of the sample unit mass; use the principal component analysis method to process the peak point data of the CPMG sequence of each peanut sample, and obtain the principal component scatter diagram of each peanut sample; take the unknown variety peanut and use the same CPMG sequence to analyze the unknown variety peanut The sample is scanned by nuclear magnetic resonance transverse relaxation, and the measured CPMG sequence peak point data is obtained for principal component analysis, and the variety of the unknown peanut sample is determined by comparing the principal component scatter diagram of each peanut sample obtained in step S2. The method of the invention has outstanding advantages such as fast analysis speed, high analysis efficiency, no pollution to the environment, no impact on the health of experiment operators, etc., and can provide reliable basis for analyzing and identifying peanut varieties.

Description

technical field [0001] The invention belongs to the field of quick and non-destructive analysis of peanut varieties, in particular to a method for identifying peanut varieties by low-field nuclear magnetic resonance. Background technique [0002] Peanut has high nutritional value and is known as Longevity Fruit, Millennium Fruit, Longevity Fruit, etc. It is an important economic crop and oil crop in my country and the world. In recent years, the nutritional value of peanuts has been gradually confirmed by researchers through experiments. For example, Professor Chris Eisenter of the University of Pennsylvania found through experiments that peanut oil diet is almost the same as olive oil diet, and has a good effect in preventing and treating cardiovascular diseases. . 80% of peanut fat is unsaturated fatty acid, and peanut also contains many anti-cancer and anti-aging substances (Cui Fenggao. Peanut Communication, 2003, 6: 11-12). However, different varieties of peanuts have...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N24/08
CPCG01N24/08
Inventor 谭明乾臧秀冯骥陈腾
Owner DALIAN POLYTECHNIC UNIVERSITY
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