WIT Press


MRI Studies Of Sedimenting Suspensions

Price

Free (open access)

Paper DOI

10.2495/MPF030231

Volume

42

Pages

7

Published

2003

Size

477.80 kb

Author(s)

S.A Altobelli & S.D. Beyea

Abstract

MRI studies of sedirnenting suspensions S.A. Altobelli & S.D. Beyea New Mexico Resonance, USA Abstract We describe recently developed Nuclear Magnetic Resonance (NMR) based methods for measuring the concentration of two- or three-component systems as a function of height and time. Results from sedimenting and floating systems with a single solid phase were obtained with an NMR visible liquid phase and NMR-invisible solid phases. Vertical profiles of the liquid phase signal were observed by repeated one-dimensional imaging. Profiles of the solid phase were then calculated by subtracting from the profile of a pure liquid and hindered settling functions were calculated. Two NMR imaging techniques were developed which allow for the measurement of two NMR visible phases in three phase systems. One method relies on differences in the longitudinal relaxation time Ti of two substances, and the other depends on the difference in NMR frequency between protons and ' 9 ~ nuclei. Preliminary results in mixt

Keywords