Nmr Sample Preparation
Nmr Sample Preparation - Related Videos
09:24
Application and Methodology of the Non-destructive 19F Time-domain NMR Technique to Measure the Content in Fluorine-containing Drug Products
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Cited by 2 •
2017
A simple and non-destructive technique that measures the average content of drug substances in formulated drug products containing fluorine using low-field fluorine-19 (19F) time-domain (TD) nuclear magnetic resonance (NMR) is presented here. The technique can be applied to the development and manufacturing of drugs in the pharmaceutical industry.
03:01
Sample Preparation for Metabolomics: A Method to Prepare Cell Samples for Metabolite Profiling
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2023
This video describes a technique of preparing breast cancer cell samples for metabolite profiling. Breast cancer cells are treated with estradiol, which binds to the estrogen receptor alpha and causes change in the metabolite...
10:08
Nuclear Magnetic Resonance (NMR) Spectroscopy
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2023
Source: Laboratory of Dr. Henrik Sundén – Chalmers University of Technology Nuclear magnetic resonance (NMR) spectroscopy is a vital analysis technique for organic chemists. With the help of NMR, the work in the organic lab has been facilitated tremendously. Not only can it provide information about the structure of a molecule but also determine the content and purity of a sample. Compared with other commonly encountered techniques for organic chemists — such as thermal analysis and mass...
09:51
Sample Preparation for Analytical Characterization
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2023
Source: Laboratory of Dr. B. Jill Venton - University of Virginia Sample preparation is the way in which a sample is treated to prepare for analysis. Careful sample preparation is critical in analytical chemistry to accurately generate either a standard or unknown sample for a chemical measurement. Errors in analytical chemistry methods are categorized as random or systematic. Random errors are errors due to change and are often due to noise in instrument. Systematic errors are due to...
16:20
Hyperpolarized Xenon for NMR and MRI Applications
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Cited by 28 •
2012
The production of hyperpolarized xenon by means of spin exchange optical pumping (SEOP) is described. This method yields a ~10000-fold enhancement of the nuclear spin polarization of Xe-129 and has applications in nuclear magnetic resonance spectroscopy and imaging. Examples of gas phase and solution state experiments are given.
FAQs
A deuterated solvent supports both spectral quality and instrument stability. It provides a medium in which the chemical sample can dissolve while producing reduced solvent interference, and its deuterium signal helps stabilize the magnetic field frequency. Choosing a suitable solvent therefore contributes to clearer spectra, more reliable measurements, and effective field adjustment during analysis.
Concentration must be appropriate for the measurement because concentration-related signal problems can reduce spectral reliability. An unsuitable concentration may interfere with the ability to obtain useful signals or compare measurements reproducibly. Preparing the sample at an appropriate concentration helps the instrument produce interpretable spectral information for molecular identification, purity assessment, and reaction monitoring.
Particulates and impurities can compromise spectral quality and make the sample less suitable for structural analysis. Careful handling minimizes these sources of interference, helping produce cleaner and more reproducible measurements. Removing or avoiding such problems also supports effective shimming, which is necessary for establishing a uniform magnetic environment around the sample during acquisition.
The sample should be transferred into an NMR tube at an appropriate volume and positioned correctly for analysis. These factors help establish a uniform magnetic environment across the measured region, which supports effective shimming and consistent spectra. Poor control of volume or positioning can undermine measurement reproducibility even when the dissolved chemical sample is suitable.
A practical workflow includes dissolving the chemical sample in a suitable deuterated solvent, transferring the solution into an NMR tube, and using an appropriate concentration and volume. The tube is then positioned for measurement, while particulates and impurities are minimized through careful handling. Together, these steps prepare the sample for shimming and spectral acquisition.
Well-prepared samples provide reliable spectra that can support molecular identification, purity assessment, and reaction monitoring. They also help researchers examine molecular structure and dynamics by reducing solvent interference, concentration-related problems, and other sources of measurement variability. In chemistry, consistent preparation is therefore important when comparing samples or interpreting changes during a reaction.