Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A Method for Obtaining Two-dimensional NMR Coherence Spectrum under Inhomogeneous Magnetic Field

A technology of nuclear magnetic resonance and uniform magnetic field, applied in the direction of analysis using nuclear magnetic resonance

Active Publication Date: 2017-04-05
XIAMEN UNIV
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, prior information about the distribution of the inhomogeneous magnetic field is required

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A Method for Obtaining Two-dimensional NMR Coherence Spectrum under Inhomogeneous Magnetic Field
  • A Method for Obtaining Two-dimensional NMR Coherence Spectrum under Inhomogeneous Magnetic Field
  • A Method for Obtaining Two-dimensional NMR Coherence Spectrum under Inhomogeneous Magnetic Field

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] The present invention will be further described below through specific embodiments.

[0024] The invention relates to a method for acquiring a two-dimensional nuclear magnetic resonance coherent spectrum under an inhomogeneous magnetic field. Under the inhomogeneous magnetic field of the nuclear magnetic resonance signal, the spectral line in the z direction of the sample will shift with the change of the spatial magnetic field, making it impossible to identify the two-dimensional coherent spectrum obtained by direct Fourier transform. The spatial dimension is corrected with the help of pattern recognition and dephasing algorithms, so as to correct the shifted spectral lines and obtain a high-resolution two-dimensional coherent spectrum. Main steps of the present invention are as follows:

[0025] 1) First apply a radio frequency pulse to rotate the magnetization vector from the Z axis to the XY plane, then apply a pair of chirp pulses and encoding gradients in the z d...

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 obtaining a two-dimensional nuclear magnetic resonance coherence spectrogram under a nonuniform magnetic field. The method comprises the steps of applying a radio-frequency pulse, rotating a magnetization vector from a Z-axis to an XY plane, then applying a pair of chirp pulses and a pair of encoding gradients in the Z direction, conducting space encoding on the Z direction of a sample, and then applying another radio-frequency pulse; finally, conducting sampling under the effect of multiple pairs of encoding gradients of positive and negative switching; conducting packet sequencing and two-dimensional Fourier transform on collected data, and obtaining a space-frequency two-dimensional diagram; rectifying spatial dimensions by applying pattern recognition algorithm analysis and a phase rectifying algorithm, then conducting inverse Fourier transform on the spatial dimensions, obtaining a high-resolution two-dimensional nuclear magnetic resonance coherence spectrogram, and obtaining chemical information. The high-resolution spectrogram and spatial information which are obtained through the method have a remarkable effect in real-time chemical monitoring analysis and sample spatial distribution analysis.

Description

technical field [0001] The invention relates to the field of methods for obtaining high-resolution two-dimensional nuclear magnetic resonance coherent spectra, in particular to a method capable of obtaining high-resolution two-dimensional nuclear magnetic resonance coherent spectra by performing a single scan under an inhomogeneous magnetic field. Background technique [0002] As a powerful non-invasive detection method, high-resolution NMR technology has been widely used in many fields such as chemistry, bio-metabolic analysis, medicine and materials science. Since the discovery of the nuclear magnetic resonance phenomenon, various magnetic resonances have been successively developed and applied to practical research in different scientific research fields. Among these techniques, the measurement of high-resolution two-dimensional magnetic resonance coherence spectroscopy is of irreplaceable importance and necessity. However, in many cases, the inhomogeneity of the magneti...

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 Patents(China)
IPC IPC(8): G01N24/08
Inventor 陈忠韦芝良杨健陈友和陈林林雁勤
Owner XIAMEN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com