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Determination of pore space shape and size in porous systems using NMR diffusometry. Beyond the short gradient pulse approximation

Price, W S; Stilbs, P and Söderman, Olle LU (2003) In Journal of Magnetic Resonance 160(2). p.139-143
Abstract
The influence of finite length gradient pulses on NMR diffusion experiments on liquids

confined to diffuse between two parallel planes is investigated. It is experimentally verified that the pore size decreases when determined using finite gradient pulses if the results are analyzed within the short gradient pulse approximation. The results are analyzed using the matrix formulation. The observed minima in the echo decay profiles are considerably less sharp than theoretical analysis would indicate and we suggest that this is due to the presence of a distribution of pore sizes in the sample. In addition, effects due to the presence of background gradients are discussed. It is argued that effects due to the finite length gradient... (More)
The influence of finite length gradient pulses on NMR diffusion experiments on liquids

confined to diffuse between two parallel planes is investigated. It is experimentally verified that the pore size decreases when determined using finite gradient pulses if the results are analyzed within the short gradient pulse approximation. The results are analyzed using the matrix formulation. The observed minima in the echo decay profiles are considerably less sharp than theoretical analysis would indicate and we suggest that this is due to the presence of a distribution of pore sizes in the sample. In addition, effects due to the presence of background gradients are discussed. It is argued that effects due to the finite length gradient pulses are relatively minor and in realistic applications the effects due to inhomogeneities in pore sizes and effects due to background gradients will constitute more serious problems in pore size determinations by means of NMR diffusometry. (C) 2003 Elsevier Science (USA). All rights reserved. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
NMR diffusometry, Diffusion between planes, Finite gradient pulses, Pore size distribution effects, Background gradients
in
Journal of Magnetic Resonance
volume
160
issue
2
pages
139 - 143
publisher
Elsevier
external identifiers
  • WOS:000181638600009
  • PMID:12615155
  • Scopus:0013304773
ISSN
1096-0856
DOI
10.1016/S1090-7807(02)00134-9
language
English
LU publication?
yes
id
40cf0bea-e678-4802-a274-a86c86800d92 (old id 122162)
date added to LUP
2007-07-12 10:36:32
date last changed
2016-10-13 04:37:49
@misc{40cf0bea-e678-4802-a274-a86c86800d92,
  abstract     = {The influence of finite length gradient pulses on NMR diffusion experiments on liquids<br/><br>
confined to diffuse between two parallel planes is investigated. It is experimentally verified that the pore size decreases when determined using finite gradient pulses if the results are analyzed within the short gradient pulse approximation. The results are analyzed using the matrix formulation. The observed minima in the echo decay profiles are considerably less sharp than theoretical analysis would indicate and we suggest that this is due to the presence of a distribution of pore sizes in the sample. In addition, effects due to the presence of background gradients are discussed. It is argued that effects due to the finite length gradient pulses are relatively minor and in realistic applications the effects due to inhomogeneities in pore sizes and effects due to background gradients will constitute more serious problems in pore size determinations by means of NMR diffusometry. (C) 2003 Elsevier Science (USA). All rights reserved.},
  author       = {Price, W S and Stilbs, P and Söderman, Olle},
  issn         = {1096-0856},
  keyword      = {NMR diffusometry,Diffusion between planes,Finite gradient pulses,Pore size distribution effects,Background gradients},
  language     = {eng},
  number       = {2},
  pages        = {139--143},
  publisher    = {ARRAY(0x7a14188)},
  series       = {Journal of Magnetic Resonance},
  title        = {Determination of pore space shape and size in porous systems using NMR diffusometry. Beyond the short gradient pulse approximation},
  url          = {http://dx.doi.org/10.1016/S1090-7807(02)00134-9},
  volume       = {160},
  year         = {2003},
}