Development, simulation, and validation of NMR relaxation-based exchange measurements
AUTOR(ES)
Dortch, R. D.
FONTE
American Institute of Physics
RESUMO
Two-dimensional (2D) nuclear magnetic resonance correlation experiments have recently been proposed as a means for studying exchange in porous media. Most notable of these is the T2−T2 relaxation exchange spectroscopy (REXSY) experiment. Unfortunately, quantifying exchange with this method requires a relatively long, three-dimensional acquisition. To reduce acquisition times, novel 2D methods for quantifying exchange were developed. For each method, model equations were derived (for an arbitrary N-pool system), tested via simulation studies, and validated via experimental studies in an aqueous urea model system. Results indicate that the novel methods outperform REXSY—in terms of uncertainty per unit time for the fitted exchange rate—for certain model systems. The relative merits of each method are discussed in the text.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=2776779Documentos Relacionados
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