Abstract
Experimental data are reported for elution of a number of solutes from alumina by several very strong eluents. A number of these strong eluents (the ethers, amines, alcohols, pyridine) exhibit unique elution characteristics, leading to a number of new separation possibilities. A quantitative theory has been developed for the relationship between elution strength and eluent constitution. For elution from alumina, the eluent properties of almost any common solvent or solvent mixture can now be accurately predicted. Whereas most solutes adsorb parallel to the adsorbent surface (flat), it is shown that the phenols adsorb in a perpendicular configuration (vertical) from strong eluents.
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