Nuclear magnetic resonance imaging method for chemical material component detection

Abstract

The invention relates to a nuclear magnetic resonance imaging method for chemical material component detection. The method comprises the following steps: selecting a detection condition, setting a sample to be detected, deriving chemical component images, performing inversion by a computer, analyzing the material structure and the chemical components, and plotting a time-chemical shift diagram and a time-component diagram. A nuclear magnetic resonance imaging machine is used for measuring a nuclear magnetic resonance chemical shift spectrum and a relaxation spectrum of the sample to be detected, so as to obtain the relation between chemical structure change and intermolecular force; component correlation analysis is carried out by using chemical shift as a chemical component image; computer inversion is carried out to obtain a spatial distribution chemical structure spectrum distribution map and a relaxation spectrum; different chemical shift images are selected by software, and analysis is carried out to obtain the material structure and the chemical components; a time-chemical shift diagram and a time-component diagram are plotted to obtain a chemical shift spectrum and a component distribution map with time change. The method of the invention has the advantages of convenient operation, accurate imaging, high automation degree, and reliable analytic data.

Description

Technical field [0001] The invention relates to a non-destructive testing technology of chemical materials, in particular to a nuclear magnetic resonance imaging method for component testing of chemical materials. Background technique [0002] Nuclear magnetic resonance imaging technology has been widely used in physics, chemistry, medical treatment, archaeology, petrochemical industry, etc. It uses the principle of nuclear magnetic resonance to detect the electromagnetic waves emitted by the object under inspection by means of an external gradient magnetic field, and draws the object accordingly. image of the internal structure. Such MRI techniques cannot be used for material composition imaging and non-destructive testing. The low-field NMR technology of the prior art can only be used for imaging small molecular components of materials. Since the small molecular components of materials have a long relaxation time in a magnetic field, they are easy to detect and can be ima...

AI Technical Summary

Problems solved by technology

This type of MRI cannot be used for material composition imaging and non-destructive testing

The low-field nuclear magnetic resonance technology of the prior art can only be used for imaging small molecular components of materials. Since the small molecular components of materials have a long relaxation time in the magnetic field, they are easy to detect and can be imaged by low magnetic field

However, this imaging is a hybrid imaging and cannot determine the chemical composition of the material

There is currently no way to image the chemical composition of the material