Method for rapidly testing freshness of rice

A testing method and technology of freshness, applied in the direction of color/spectral characteristic measurement, analysis through chemical reaction of materials, material analysis through observation of the impact on chemical indicators, etc. Food hazards and other issues, to achieve high detection accuracy, easy production and application, and low detection cost

Inactive Publication Date: 2017-11-28
COFCO CHENGDU GRAIN & OIL IND
View PDF0 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] During the storage process, rice will deteriorate due to aging, especially in a humid and warm environment. When the deterioration is serious, changes in appearance will occur, such as discoloration, which can be distinguished by the naked eye, but the deterioration The rice in the process is difficult to distinguish directly because of its inconspicuous changes in appearance. These rices are very likely to deteriorate completely under certain environmental conditions, or to further develop mildew during transportation, which is not only extremely harmful to their own quality. Unfavorable, it will affect other products in contact with it at the same time, and bring harm to consumers

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Use the following reagents of Group A and B to detect the freshness of rice, wherein:

[0021] Group A reagents include: sodium methoxide, sodium chloride, bromothymol blue, methyl red, potassium dihydrogen phosphate and dipotassium hydrogen phosphate dissolved in deionized water buffer, the pH of the buffer is 5.5, except for buffer Other components outside the liquid are all dissolved in the buffer solution, wherein the mass ratio of methyl red to bromothymol blue is 1:2, and the total concentration of the solute potassium dihydrogen phosphate and dipotassium hydrogen phosphate in the buffer solution is 0.08mol / L, the mass ratio of sodium methoxide to sodium chloride is 1:1:1;

[0022] Group B reagents include: octaethylporphyrin, protoporphyrin dimethyl ester, Nile red, chloroform, and other components are all dissolved in chloroform, wherein the concentration of octaethylporphyrin is 1mg / mL, protoporphyrin dimethyl The concentration of ester is 1.5mg / mL, the conce...

Embodiment 2

[0030] Use the following reagents of Group A and B to detect the freshness of rice, wherein:

[0031] Group A reagents include: sodium methoxide, sodium chloride, bromothymol blue, methyl red, potassium dihydrogen phosphate and dipotassium hydrogen phosphate dissolved in a buffer solution of deionized water, the pH of the buffer solution is 6.5, except for the buffer Other components outside the liquid are all dissolved in the buffer solution, wherein the mass ratio of methyl red to bromothymol blue is 1:3, and the total concentration of the solute potassium dihydrogen phosphate and dipotassium hydrogen phosphate in the buffer solution is 0.12mol / L, the mass ratio of sodium methoxide to sodium chloride is 1.5:1;

[0032] Group B reagents include: octaethylporphyrin, protoporphyrin dimethyl ester, Nile red, chloroform, and other components are all dissolved in chloroform, wherein the concentration of octaethylporphyrin is 2mg / mL, protoporphyrin dimethyl The concentration of e...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a method for quickly testing the freshness of rice, which uses the following reagents of groups A and B: the reagents of group A include: sodium methoxide, sodium chloride, bromothymol blue, methyl red, buffer solution; the reagents of group B Including: octaethylporphyrin, protoporphyrin dimethyl ester, Nile red, solvent, and then the samples to be tested are compared with the standard products corresponding to the reagents of group A and the standard products corresponding to the reagents of group B and scored respectively to obtain The final freshness value is 0.43×A score+0.61×B score. The detection method of the invention is convenient and fast, has high detection accuracy and is convenient for production and application.

Description

technical field [0001] The invention relates to the technical field of freshness detection methods. Background technique [0002] During the storage process, rice will deteriorate due to aging, especially in a humid and warm environment. When the deterioration is serious, changes in appearance will occur, such as discoloration, which can be distinguished by the naked eye. The rice in the process is difficult to distinguish directly because of the inconspicuous changes in its appearance. These rices are very likely to deteriorate completely under certain environmental conditions, or to further develop mildew during transportation, which is not only extremely harmful to their own quality. Unfavorable, it will affect other products in contact with it at the same time, and bring harm to consumers. Contents of the invention [0003] The purpose of the present invention is to propose a detection method that can accurately and quickly detect the freshness of rice. [0004] Tech...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78G01N21/31
CPCG01N21/78G01N21/31
Inventor 郭保江王振宇谢小龙张国强严佳
Owner COFCO CHENGDU GRAIN & OIL IND
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap