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Related Concept Videos

NMR Spectrometers: Overview01:20

NMR Spectrometers: Overview

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NMR spectrometers consist of a strong magnet, a radiofrequency transmitter, and a detector attached to a computer console for recording spectra of samples containing NMR-active nuclei. In first-generation NMR instruments called continuous-wave spectrometers, the resonance frequencies of the nuclei are determined by frequency-sweep or field-sweep methods. The magnetic field strength is fixed and the rf signal is swept in the former, while the radiofrequency signal is fixed and the magnetic field...
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NMR Spectrometers: Resolution and Error Correction01:14

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When magnetic nuclei in a sample achieve resonance and undergo relaxation, the signal detected in NMR is an approximately exponential free induction decay. Fourier transform of an exponential decay yields a Lorentzian peak in the frequency domain. Lorentzian peaks in an NMR spectrum are defined by their amplitude, full width at half maximum, and position, where the peak width is governed by the spin-spin relaxation time alone. In real experiments, however, the applied magnetic field is rendered...
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NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences01:17

NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences

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A pulse is a short burst of radio waves distributed over a range of frequencies that simultaneously excites all the nuclei in the sample. Upon passing a radio frequency pulse along the x-axis, the nuclei absorb energy corresponding to their Larmor frequencies and achieve resonance. This shifts the net magnetization vector from the z-axis toward the transverse plane. This angle of rotation of the magnetization vector, or the flip angle, is proportional to the duration and intensity of the pulse.
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Applications Of NMR In Biology01:25

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Nuclear magnetic resonance (NMR) spectroscopy is a very valuable analytical technique for researchers. It has been used for more than 50 years as an analytical tool. F. Bloch and E. Purcell formulated NMR in 1946 and won the 1952 Nobel Prize in Physics  for their work. Biological macromolecules such as proteins, nucleic acids, lipids, and organic molecules including pharmaceutical compounds, can be studied using this versatile tool that exploits the magnetic properties of certain nuclei.
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2D NMR: Overview of Homonuclear Correlation Techniques01:16

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Homonuclear correlation spectroscopy (COSY) is a powerful technique used in Nuclear Magnetic Resonance (NMR) spectroscopy to study the correlations between nuclei of the same type within a molecule. It provides information about scalar couplings between adjacent nuclei, which helps determine connectivity and structural information. There are several COSY variants, each with its unique strengths and experimental parameters.
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Nuclear Magnetic Resonance (NMR): Overview01:07

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Nuclear magnetic resonance (NMR) is a phenomenon exhibited by certain nuclei that can absorb characteristic radio frequency radiation under certain conditions. NMR has been extensively applied in molecular spectroscopy and medical diagnostic imaging. In both these applications, the molecule or subject under study is placed in a magnetic field and irradiated with radio frequency energy.
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Inline NMR via a Dedicated V-Shaped Sensor.

Eric Schmid1, Simon Rondeau1, Thomas Rudszuck1

  • 1Institute of Mechanical Process Engineering and Mechanics, Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany.

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Summary
This summary is machine-generated.

A novel V-sensor enables non-invasive, inline process monitoring using single-sided nuclear magnetic resonance. This technology offers reliable material characterization for applications like battery production, enhancing process control.

Keywords:
NMR-sensordiffusioninline process monitoringlow field NMRrelaxation

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Area of Science:

  • Analytical Chemistry
  • Materials Science
  • Process Engineering

Background:

  • Process monitoring and control necessitate reliable analytical measures.
  • Nuclear magnetic resonance (NMR) is a versatile technique, yet underutilized in process monitoring.
  • Single-sided NMR and dedicated sensors offer potential for inline material analysis.

Purpose of the Study:

  • To introduce and characterize a novel V-sensor for non-destructive, non-invasive inline process monitoring.
  • To demonstrate the sensor's capability in quantifying properties of stationary liquids.
  • To showcase the V-sensor's application in battery production, specifically for anode slurries.

Main Methods:

  • Development of a V-sensor with an open radiofrequency coil geometry for versatile applications.
  • Inline investigation of materials within a pipe.
  • Integral quantification of stationary liquid properties.
  • Testing with graphite slurries as an exemplary application in battery manufacturing.

Main Results:

  • The V-sensor allows for non-destructive and non-invasive inline material investigation.
  • The sensor successfully quantified properties of stationary liquids.
  • Initial results with graphite slurries demonstrate the sensor's added value for process monitoring in battery production.

Conclusions:

  • The V-sensor represents a significant advancement for inline process monitoring.
  • Its unique design facilitates mobile and manifold applications.
  • The technology shows promise for enhancing quality control and process understanding in industries like battery manufacturing.