Abstract
Alkali metal salts present in distilled water as impurities change the surface of a silica cavity from smooth to rough and groovy surface. The multi-peaked responses observed with a new cavity change into a single peak when the cavity is treated with alkali metal salts compounds. It is concluded that the effect of the alkali metal salt-treated cavity is mainly attributable to the roughness of the surface; the peak splitting is cuased by aggregate formation and the roughness of the cavity surface enhances good dispersion and volatility of samples and suppresses peak splitting.
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