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Grain production place discriminating method utilizing heavy element isotope ratio composition

A technology of isotope ratio and grain, applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of few institutions, limited utilization, and insufficient measurement accuracy for origin identification.

Inactive Publication Date: 2011-09-21
一般财团法人日本谷物检定协会 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The latter is an expensive and special device, so there are few institutions in possession, and its use in production area identification research is limited, and it also prevents its use at the site where actual inspections are performed.
People have also studied the use of a relatively cheap single-detector high-resolution inductively coupled plasma mass spectrometry device to identify the origin of wine (Non-Patent Document 4), but the measurement accuracy is not enough to identify the origin of grains

Method used

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  • Grain production place discriminating method utilizing heavy element isotope ratio composition
  • Grain production place discriminating method utilizing heavy element isotope ratio composition
  • Grain production place discriminating method utilizing heavy element isotope ratio composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] [sample]

[0058] The test specimens were granular raw samples, the details of which are given below.

[0059] 【Table 1】

[0060] Origin and type of rice samples

[0061]

[0062] 【Table 2】

[0063] Origin and type of barley samples

[0064]

[0065]

[0066] 【table 3】

[0067] Origin and type of wheat samples

[0068]

[0069] 〔acid hydrolysis〕

[0070] Weigh about 2.5g of rice into 4 digestion tubes, and weigh 2.5g of barley and wheat into 2 digestion tubes. 10 mL of 69% nitric acid was added to each tube, and acidolysis was performed by heating with a DigiPREP acidolysis heating block system. Add 2 mL of 30% hydrogen peroxide during this process to promote decomposition, and slightly stagger the lid to allow the acid to evaporate from the crevices. In the case of scorched black, add a small amount of 69% nitric acid and 30% hydrogen peroxide, continue to decompose until the char disappears, and volatilize the acid. Add 1.5mL of 69% nitric acid to...

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Abstract

The present invention relates to a grain production place discriminating method which utilizes a heavy element isotope ratio composition. The isotope ratios of strontium and lead which are contained in the grain, namely an abundance ratio of a strontium isotope which is composed of mass numbers of 87 and 86, and a lead isotope which is composed of mass numbers of 208,207,206 and 204 are analyzed. The production place of the grain is discriminated through the analysis information.

Description

technical field [0001] The present invention relates to a method for identifying the origin of grains such as rice, wheat, and barley. Background technique [0002] Among grains such as rice, wheat, and barley, research on rice is the fastest-growing in terms of methods for identifying origins by physical and chemical analysis. As the method, there are the following research reports: (i) a method of identifying the production area by confirming the difference in the nucleotide sequence existing in the rice of each production area by DNA analysis (patent document 1); (ii) by quantitatively analyzing the nucleotide sequence in the rice Various elements, the method of distinguishing the place of origin by the difference in the composition of elements present in the rice of each place of origin (non-patent document 1); (iii) by analyzing the isotope ratio of light elements such as hydrogen, carbon, nitrogen, oxygen, etc. (Patent Document 2 and Non-Patent Document 2); (iv) Combi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/72G01N30/08
Inventor 有山薰川崎晃石田悦基
Owner 一般财团法人日本谷物检定协会
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