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A method for identifying organic agricultural products by stable nitrogen isotope ratios

A technology of isotope ratio and nitrogen isotope, applied in the direction of material analysis, instruments, and measuring devices through electromagnetic means, can solve problems such as temperature drop, achieve high discrimination accuracy, broad application prospects, and ensure high-quality dietary quality requirements Effect

Active Publication Date: 2021-10-29
SHENYANG INST OF APPL ECOLOGY CHINESE ACAD OF SCI
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Problems solved by technology

However, the increasing latitude will cause the temperature to gradually decrease

Method used

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  • A method for identifying organic agricultural products by stable nitrogen isotope ratios
  • A method for identifying organic agricultural products by stable nitrogen isotope ratios
  • A method for identifying organic agricultural products by stable nitrogen isotope ratios

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0038] 1.1 test sample

[0039] Amazing 83 cherry tomatoes samples were picked up in 4 regions (Shenyang, Jinan, Nanjing, Sichuan), including 45 organic tomatoes samples, 38 copies of cultural tomatoes samples, and record the latitude coordinates of the origin, and will be cleaned after the above sample The whole fruit is broken, and 20 g is weighed for vacuum freeze, grind the dry tomato sample, and sealed in the sealing bag.

[0040] 1.2 test method

[0041] With one million days, 2 mg samples were weighed, and the stable nitrogen rattice ratio was measured by the tin cup. Each sample is repeated three times and Δ is calculated according to equation (2) 15 N value.

[0042] δ 15 N = [(() 15 N / 14 N) 样品 (( 15 N / 14 N) 标准-1] × 1000 (2)

[0043] " 15 N / 14 N) 样品 For sample stabilize nitrogen isotope ratio, 15 N / 14 N) 标准 Stabilized the nitrogen isotope ratio of the standard substance.

[0044] Among them, stable nitrogen isotope ratio (δ) by means of EA-IRMS combination technol...

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Abstract

The invention relates to a discrimination method, in particular to a method for identifying organic agricultural products through stable nitrogen isotope ratios, which is mainly suitable for tomatoes. The coordinates of the origin of the tomato of the sample to be identified are used as an independent variable factor, and brought into the regression model of the independent variable factor, and the y obtained according to the model is compared with the discriminant factor Y to judge whether the tomato to be identified belongs to an organic tomato; the present invention establishes a mathematical model curve, Utilizing the ratio of stable nitrogen isotopes to identify organic tomatoes, taking latitude and longitude as the influencing factors of the ratio change, can effectively identify organic tomatoes in different regions, and the accuracy rate can reach 89.74%. The invention not only helps to identify the authenticity of the planting mode of organic agricultural products and guarantees the high-quality dietary quality requirements of consumers, but also provides a practical judgment method for the supervision of organic agricultural products, and has broad application prospects.

Description

Technical field [0001] The present invention relates to a method of discriminating, and in particular, a method of identifying organic agricultural products by stabilizing nitrogen isotope ratio of cherry tomatoes. Background technique [0002] In recent years, agricultural production has become increasingly highly highlighted by the number of new quality demand modifications, and environmentally friendly circular agriculture has become increasingly highlighted. With the improvement of living standards, people are increasingly paying attention to food safety. Due to the high safety of organic foods, related products gradually entered the family of ordinary people. However, due to the high prices of organic food, there are some unscrupulous merchants to label "organic" words, counterfeit "organic food" pit consumers. Organic Agricultural Products is the highest level of agricultural development. The European Parliament "Public Health and Food Safety Committee" will list organic fo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/62
CPCG01N27/62
Inventor 王世成王颜红李波
Owner SHENYANG INST OF APPL ECOLOGY CHINESE ACAD OF SCI
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