Corn imperfect kernel standard sample and its preparation method

A standard sample, corn technology, applied in the field of plant seed standard sample preparation, can solve problems such as the accuracy of imperfect test results and incomparability of test results, and achieve the effects of improving laboratory quality management, reducing risks, and reducing costs

Active Publication Date: 2022-05-06
INST OF CROP SCI CHINESE ACAD OF AGRI SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These factors largely affect the accuracy of the test results of imperfect grain items, and also cause the incomparability of test results between laboratories

Method used

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  • Corn imperfect kernel standard sample and its preparation method
  • Corn imperfect kernel standard sample and its preparation method
  • Corn imperfect kernel standard sample and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The determination of embodiment 1 evaluation standard

[0034] Determine the most important and commonly used standard for the determination of imperfect corn kernels in China - "GB 1353-2018 Corn" is the text standard for reference in the production of standard samples of imperfect corn kernels in this project. The seed project is defined as follows:

[0035] 1) Insect-damaged kernels: Insect-damaged kernels are particles that are eaten away by insects and form holes or tunnels.

[0036]2) Spotted kernels: Spotted kernels on the grain surface that damage the embryo or endosperm.

[0037] 3) Broken kernels (broken kernels): The kernels are broken to more than one-fifth (inclusive) of the volume of the original kernel.

[0038] 4) Sprouted kernels: sprouts or roots break through the epidermis, or sprouts or roots do not break through the epidermis, but the epidermis of the embryo has been ruptured or obviously raised, and there are signs of sprouting.

[0039] 5) Mold...

Embodiment 2

[0041] Example 2 Insect-eaten grains, diseased grains, collection and screening of broken grains

[0042] 1. Collection and screening of insect-eaten grains

[0043] The standard sample development unit Chinese Academy of Agricultural Sciences Institute of Crop Science / Grain Quality Supervision, Inspection and Testing Center of the Ministry of Agriculture and Rural Affairs undertakes special monitoring of national grain product quality and safety, national corn product quality and safety risk assessment, and regional test quality of new corn varieties in the country and some provinces and cities In recent years, a total of more than 2,500 corn samples have been collected, covering more than 200 corn varieties in the main corn producing areas of my country. During the development process of this standard sample, the development unit combined with the daily corn quality inspection work to collect and sort corn insect-infested kernels from the above 2,500 samples, and then store t...

Embodiment 3

[0050] The preparation and screening of embodiment 3 raw bud grains

[0051] According to the cause of corn germination, the intact corn is selected, cultivated at a suitable temperature and humidity, collected according to the set time period, and finally summarized and classified according to different degrees of germination. Before making sprouts, the preparation work should be done firstly, including choosing the environment for corn germination, culture vessels, etc., and secondly, there should be special personnel in charge of daily management.

[0052] The specific method of production: select normal corn of the same size, clean and remove impurities, lay 2-3 layers of filter paper in the petri dish, inject clean water until it is saturated, place the seeds evenly on the filter paper, cover the lid, and place In an artificial climate box, culture at 20°C, observe in time, collect and dry according to different germination degrees, and prepare for the screening of standa...

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Abstract

The invention discloses a standard sample of imperfect corn kernels and a preparation method thereof. The standard sample of imperfect corn kernels is made from insect-eaten kernels, disease-spotted kernels, broken kernels, sprouted kernels, moldy kernels and heat-damaged kernels, which are embedded in organic resin. The invention adopts organic resin embedding technology to make standard samples of imperfect corn grains, which have excellent properties such as flame retardancy, aging resistance, non-toxicity, oxidation resistance, heat resistance, insulation, etc., and the standard samples of imperfect corn grains are developed in this inspection field. Quality control activities provide a reliable and scientific material basis, which is conducive to laboratory quality control, is conducive to improving the quality management level of the laboratory, and reduces the risk of the accuracy of laboratory test results.

Description

technical field [0001] The invention belongs to the technical field of plant seed standard sample preparation, and in particular relates to a standard sample of imperfect corn kernels and a preparation method thereof. Background technique [0002] In international grain trade, grain prices are directly linked to grain grades, and the content of indicators such as imperfect grain determination directly affects economic interests. Therefore, the inspection of the corn imperfect kernel project is an indispensable part of safeguarding the interests of the country and enterprises. At present, the inspection of imperfect kernel items in corn is all sensory inspection, and human factors such as the experience and vision of inspection technicians directly affect the inspection results. Without the assistance of sophisticated instruments, the actual situation encountered in the inspection of imperfect kernels, such as the degree of corn breakage, the degree of mold, etc., will cause...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/28
CPCG01N1/28
Inventor 张慧杰王步军李静梅李为喜孙丽娟胡学旭
Owner INST OF CROP SCI CHINESE ACAD OF AGRI SCI
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