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Method for measuring nanmu seed moisture content by using LF-NMR

A technology of LF-NMR and a determination method, which is applied in the field of LF-NMR determination of moisture content of nanmu seeds, can solve the problems of time-consuming measurement results and inaccurate measurement results, and achieve the effect of controllable measurement process and guaranteed accuracy.

Inactive Publication Date: 2019-12-27
HUBEI UNIV FOR NATITIES
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] The traditional drying method, the measurement results are time-consuming; the traditional rapid measurement method, the measurement results are not accurate enough; the above problems are difficult to solve with the existing technology

Method used

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  • Method for measuring nanmu seed moisture content by using LF-NMR
  • Method for measuring nanmu seed moisture content by using LF-NMR
  • Method for measuring nanmu seed moisture content by using LF-NMR

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Embodiment 1

[0067] The present embodiment provides a kind of LF-NMR assay method of nanmu seed moisture content, described method comprises nanmu seed sample sampling step, low-field nuclear magnetic resonance technology (LF-NMR) detection step and seed moisture content calculation step:

[0068] (1) Phoebe seed sample sampling: Phoebe seed collection time is September-October every year, utilize high-branch scissors to pick the seeds of Phoebe excellent tree (Phoebe-1) in the mature season of Phoebe seeds, rinse 3-5 times with deionized water, Remove the pulp, remove the water on the surface of the seeds on a dust-free absorbent paper, select 500g of Phoebe seeds with an intact surface, and place them in a 4°C refrigerator for testing.

[0069] (2) Low-field nuclear magnetic resonance (LF-NMR) detection steps: the process includes the following steps:

[0070] The first step, use the Carr-Purcell-Meiboom-Gill (CPMG) pulse sequence to collect the signal of the seed; pulse sequence paramet...

Embodiment 2

[0085] This embodiment is basically the same as Example 1, except that the nanmu seeds are the seeds collected from the Nanyou-2you tree, and the age of the tree is 50 years.

Embodiment 3

[0087] This example is basically the same as Example 1, except that the nanmu seeds are collected from the Nanyou-3you tree, and the age of the tree is 75 years.

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Abstract

The present invention belongs to the technical field of seed measurement, and discloses a method for measuring the nanmu seed moisture content by using LF-NMR (low-field nuclear magnetic resonance). The method comprises: sampling nanmu seed samples: during the maturity season of nanmu seeds, using a high-branch shear to pick the seeds of excellent nanmu trees, rinsing the seeds by using deionizedwater for 3-5 times, removing the flesh, removing the seed surface moisture on a dust-free absorbent paper, selecting 500g of nanmu seeds with a intact surface, and placing the nanmu seeds in a 4 DEGC refrigerator for testing; using the low-field nuclear magnetic resonance technology to test the nanmu seed samples; and based on the obtained T2 spectrum data of the seeds, using a linear relationship between the seed moisture content and a total signal value to obtain the seed moisture ratio by adding the three nuclear magnetic resonance relaxation peaks, and calculating the nanmu seed moisturecontent. The method provided by the present invention is highly scientific, and simple and easy to operate, is not affected by human factors and environmental factors, and is accurate and objective in result; and compared with the traditional drying methods, time is more saved and the measurement result is more accurate by using the method provided by the present invention.

Description

technical field [0001] The invention belongs to the technical field of seed measurement, in particular to an LF-NMR method for measuring the water content of nanmu seeds. Background technique [0002] At present, the existing technologies commonly used in the industry are as follows: [0003] Phoebe zhennan (Phoebe zhennan) is a large tree of the genus Phoebe in the family Lauraceae. It is a subtropical evergreen broad-leaved tall tree. It is a rare and endangered tree species unique to my country. A rare and fine timber species with high economic value. Zhennan is mainly distributed in the west of Hubei Province, the northwest of Guizhou Province, Sichuan Province and Chongqing City in my country. It has a tall and straight tree shape, luxuriant branches and leaves, and is evergreen in all seasons. It is the main tree species that compose evergreen broad-leaved forests. Nanmu mostly grows in mixed forests below 1,000 meters above sea level. Its biological characteristics a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N24/08
CPCG01N24/082
Inventor 崔令军石开明林健郭秋菊
Owner HUBEI UNIV FOR NATITIES
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