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Using pulsed gradient spin echo NMR for chemical mixture analysis
diffusion coefficients that differ by less than 30% may be obtained. In order to achieve the ... KEY WORDS: pulsed gradient spin echo NMR; diffusion; mixture analysis; diffusion or- ... (DOSY) (15–17), results in a 2-D plot with a chemical.
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Using PGSE NMR for chemical mixture analysis: Quantitative aspects
obtain quantitative pure component spectra from mixtures. ... KEY WORDS: pulsed gradient spin echo NMR; diffusion; mixture analysis; DOSY;. DECRA ...
[ antalek_2007.pdf - Read/Download File

Pulsed-Gradient Spin-Echo NMR Measurements of the Diffusion
Department of Chemistry and Erindale College, University of Toronto, ... 60 000) have been determined by the use of the pulsed-gradient spin-echo NMR technique ... diffusion coefficiente from mixtures of diffusing molecules, ... (PMMA) obtained using PGSE NMR. ..... The shortcoming of such an analysis is that its sensitivity.
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Improving the accuracy of pulsed field gradient NMR diffusion
spin or stimulated echo, is a powerful technique for NMR diffusion studies in liquid .... gradient strength across the sample, and then to calculate the ex- ...... [4] B. Antalek, Using pulsed gradient spin echo NMR for chemical mixture analysis:.
[ jmagnres2009_198_121.pdf - Read/Download File

The DOSY Toolbox: A new tool for processing PFG NMR diffusion data
School of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, UK ... Pulsed field gradient (PFG) diffusion NMR, using spin or stimu- lated echoes(PFGS[T]E), for the study of mixtures [1] is now an ... In order to get the most out of DOSY data a number of .... cluded from analysis by setting all points to zero.
[ jmagnres2009_200_296.pdf - Read/Download File

Accurate DOSY measure of out-of-equilibrium systems by
where Io is the signal intensity obtained in the absence of field gradient and I ... The analysis of the diffusion coefficients is a powerful tool to gain insight ..... [2] B. Antalek, Using pulsed gradient spin echo NMR for chemical mixture analysis: ...
[ 1503.08763 - Read/Download File

[PDF] from nih.gov - National Institutes of Health
sured using either physical or chemical methods (2). ... tions are readily obtained for various paradigmatic ini- ... is amenable to measurements using NMR methods}-. In fact ... understood from a simple bipolar pulsed gradient ex- .... A more extensive analysis of the effects of ... Bipolar Gradient Pulse Spin-echo Technique.
[ mole_dif_nuc95.pdf - Read/Download File

The DOSY Pulse Sequence and Defence Applications
Mixture analysis of organic chemicals has historically been performed using either .... information obtained through mass spectrometry coupled to these separation ... Gradient Spin Echo (PGSE) NMR, called Diffusion Ordered SpectroscopY ...
[ DSTO-TR-2130 PR.pdf - Read/Download File

NMR Spectroscopy with Spectral Editing for the Analysis of Complex
analysis of multicomponent mixtures ... clude chemical shifts, nuclear relax- ... the -art uses of NMR spectral editing ..... beginning with the pulsed gradient spin– echo (PGSE) method developed by Stejskal ... to calculate the diffusion coef®-.
[ viewmedia.cfm?id=122780&seq=0 - Read/Download File

Self-diffusion measurements with chemical shift resolution in
Diffusion encoding is provided by a stimulated echo sequence with ... experiment were performed on a mixture of water and isopropanol. ... Self-diffusion measurements using NMR is a pow- ... Spins precessing in an inhomogeneous field will lose ... (B) Chemical shift resolved 1H spectrum obtained with the pulse se-.
[ self-diffusion_measurements_with_chemical_shift_resolution_in_inhomogeneous_magnetic_fields.pdf - Read/Download File

The Diffusion Ordered Spectroscopy (DOSY) Pulse Sequence and
Mixture analysis of organic chemicals has historically been performed using either .... information obtained through mass spectrometry coupled to these separation ... Gradient Spin Echo (PGSE) NMR, called Diffusion Ordered SpectroscopY ...
[ a485737.pdf - Read/Download File

Diffusion ordered nuclear magnetic resonance spectroscopy - nmr 2.0
234. 5.2. Artifacts from chemical shift encoding . .... Diffusion spectra can be obtained by incrementing the areas of the .... Fig. 2. The Hahn stimulated echo ( STE) with pulsed field gradients. .... For analysis of spin relaxation in complex mixtures.
[ dosy(1).pdf - Read/Download File

The 2D-J-DOSY Experiment: Resolving Diffusion Coefficients in
to resolve mixture components in terms of a chemical shift and proton coupling constant as well ... Noninvasive mixture analysis by NMR is possible using ... ( BPPSTE) pulse sequence for diffusion measurements, where gradient ampli- tude (G) is ... the well-known properties of spin–echo experiments to refo- cus chemical ...
[ overlappdosy.pdf - Read/Download File

NMR Chromatography: Molecular Diffusion in the Presence of
American Journal of Analytical Chemistry, 2012, 3, 401-409 ... Keywords: NMR; Molecular Diffusion; Pulsed Field Gradients; DOSY. 1. Introduction ... tion drugs and counterfeit drug mixtures, a protein ligand binding affinity analysis and methods of incorporating .... field gradient spin echo (PFGSE) experiment starts with.
[ AJAC20120600008_67387754.pdf - Read/Download File

Diffusion Coefficients of Several Rhodamine Derivatives as
With the objective of validating the FCS calibration, diffusion coefficients of ... from both FCS and from the solvent auto-diffusion coefficients obtained by NMR. ...... Antalek B (2002) Using pulsed gradient spin echo NMR for chemical mixture ... molecules for ultrasensitive analysis and separations on microchip devices.
[ 8g12jr3502744140.pdf - Read/Download File

2D and 3D DOSY methods for studying mixtures of - RSC Publishing
relatively poor chemical shift resolution, while for heteronuclei the situation is reversed ... Diffusion-ordered NMR spectroscopy (DOSY)1,2 uses pulsed field gradient spin or stimulated spin echo experiments to sepa- ... challenging problems in mixture analysis. ... between 1H and 29Si in dimethylsiloxanes and use a DOSY–.
[ b403960b - Read/Download File

Materials and Methods
b NMR and Structure Analysis Unit, Department of Organic Chemistry, .... 1a), a 5 mM phenol solution in D2O with a measured pH of 6.50 (figure 1b) and a mixture ..... pulse gradient spin echo NMR for chemical mixture analysis: how to obtain.
[ 1139916 - Read/Download File

Pulsed field gradients: a new tool for routine <HUC>NMR</HUC>
available, ultra-clean spectra are obtained in very short acquisition times, making the experiments suitable for ... KEYWORDS: NMR; pulsed Ðeld gradients ... plicated mixtures without the need for chemical separa- ... high-resolution NMR pulse sequences combined with .... included as part of spin echoes, as shown in Fig.
[ gradient.pdf - Read/Download File

The Use of Sample Rotation for Minimizing Convection Effects in
Oct 5, 2001 ... the need for a convection-compensated NMR pulse sequences or more sophisticated ... and powerful tool to analyze complicated mixtures with- out the need for ... itoring the signal intensity decay in a pulsed-field gradient spin– echo experiment spectrum as a function of the overall gradient strength (14).
[ 2001-J Magn Reson-Esturau.pdf - Read/Download File

Fixed Field Gradient NMR Diffusion Measurements Using Bessel
Department of Chemistry, School of Chemical Sciences, University oflllinois, ... The method makes use of a Bessel function fit analysis to the spin-echo signal ... showed that by using the NMR spin echo and an applied magnetic gradient molecular ... to obtain diffusion data to good accuracy (:2%), and the method has often ...
[ 005-jmr_72_325_1987.pdf - Read/Download File

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