ISSN:
0001-1541
Keywords:
Chemistry
;
Chemical Engineering
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Process Engineering, Biotechnology, Nutrition Technology
Notes:
Resolution in chromatographic separations can be compromised by nonuniform flow distribution, heterogeneous packing, or flow instabilities such as viscous fingering. In this work, the displacement of solutes within a chromatographic column was monitored with an advanced magnetic-resonance technique, echo-planar spectroscopic imaging (EPSI). Unlike conventional magnetic-resonance imaging, this approach allows multiple solutes to be observed simultaneously, providing separate “chemical images” for each component. Qualitative chemical images were obtained in approximately 1 min with approximately 1 mm3 spatial resolution. EPSI allowed us to examine the multi-component viscous fingering problem for the first time. While many features of the instability are preserved, solute retention appears to slow the growth of solvent fingers.
Additional Material:
8 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/aic.690430214
Permalink
