Abstract
Nuclear magnetic resonance (NMR) longitudinal relaxation times ( T 1's) of lithium nuclei were measured in porous porcelain media containing solutions of lithium chloride in water. For constant salt concentration, 1/ T 1 for 7Li was found to be proportional to the specific surface area of the media. For constant specific surface area, T 1 ( 7Li) decreased with increase in concentration within the range studied, while T 1 ( 6Li) did not vary significantly with concentration. The results are discussed in terms of chemical exchange between bulk phase ions and ions in electrical double layers near the solid surface.
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