Abstract
The size and number of fine sodium chloride crystals deposited on the inside wall of the column were investigated with a scanning electron microscope. The number of crystals is related to the concentration of the sodium chloride solution, but their sizes are not greatly related to the concentration. It was found the adsorptivity of the column is small because the sodium chloride crystals are deposited on some of the active sites of the silanol groups and metal oxides. Also, it was shown that the thermal stability of such a column is superior to that of a wall-coated open-tubular column because of the adsorptive property of sodium chloride crystals on the glass wall.
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