Single-Peak NMR Concentration Measurement Using a Reference Sample
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Solution Overview
Problem
Conventional NMR spectroscopy methods struggle to accurately determine the concentration of elements that produce only a single peak, such as lithium, boron, or sodium, due to instability and lack of reference points, which is critical for precise quantification in industrial and research applications.
Innovation Solution
A method using a reference sample with a known concentration, positioned within a sensing region of an NMR measurement device, generates NMR spectra with two peaks for materials with single resonance frequencies, allowing concentration determination through peak area ratios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If conventional NMR spectroscopy is used to determine concentration of elements with single resonance frequency, then the measurement process is simple, but the measurement precision deteriorates due to lack of multiple reference points
Solution Approach 1:
The patent introduces an intermediary reference sample containing a known concentration of the same material being measured. This reference sample is positioned within the NMR sensing region alongside the test sample, enabling comparison of peak areas to determine unknown concentrations. The reference sample acts as a mediator that provides the missing reference point needed for accurate single-peak concentration determination.
2Productivity
If a single peak is used for concentration determination, then the measurement is faster and simpler, but the reliability deteriorates due to system variations and instability
Solution Approach 1:
The patent implements a feedback mechanism by continuously monitoring the reference sample peak area alongside the test sample. The known concentration of the reference material provides a stable reference signal that compensates for system drifts, magnetic field variations, and instrumental instabilities. This feedback approach maintains measurement reliability without sacrificing the speed advantage of single-peak analysis.
3Measurement precision
If multiple peaks are used for concentration determination, then the measurement precision improves through multiple reference points, but the device complexity and analysis time increase
Solution Approach 1:
The patent extracts only the essential information needed for concentration determination by using a reference sample that produces a single peak at a different frequency from the test material. This approach takes out the complexity of analyzing multiple overlapping peaks while retaining the precision benefits of comparative analysis. The reference peak is selectively isolated and used solely for concentration calculation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables accurate concentration measurements of materials with single peaks by accounting for NMR system variations, enhancing precision and reliability in materials science, chemical engineering, and pharmaceutical research.
Implementation Method 1
Nuclear magnetic resonance (NMR) spectroscopy is a powerful analytical technique used to determine the structure, dynamics, and chemical environment of molecules. This method relies on the interaction between atomic nuclei and magnetic fields
Implementation Method 2
each element or molecule exhibits a characteristic resonance frequency when subjected to a strong magnetic field
Implementation Method 3
positioning a reference sample that comprises the material and a sample of the fluid within a sensing region of an NMR measurement unit coil of a production line NMR measurement device, and within a magnetic field of a permanent magnet
Data Source
AI summary
A method for production line nuclear magnetic resonance (NMR) measurement of a fluid comprising a material having a single resonance frequency, the method includes: (a) positioning a reference sample comprising the material and a sample of the fluid within a sensing region of an NMR measurement unit coil of a production line NMR measurement device, and within a magnetic field of a permanent magnet of the production line NMR measurement device, wherein a concentration of the material within the reference sample is of a known value; (b) performing an NMR measurement comprising feeding at least one radio frequency coil of the production line NMR measurement device with a signal having a spectrum that comprises a characteristic frequency of a nucleus of the material, and generating detection signals indicative of sensed radio frequency emissions associated with the reference sample and the sample of the fluid; (c) processing the detection signals to provide an NMR spectrum comprising a first peak associated with the material within the reference sample and a second peak associated with the material within the fluid; and (d) determining a concentration of the material within the fluid based on a relationship between an attribute of the first peak, an attribute of the second peak and the known value.