Published: Journal of Chromatographic Science, Volume 33, Number 6, June 1995, pp.303-308.
Study of the Excess Adsorption of the Eluent Components on
Different Reversed-Phase Adsorbents
Yu. V. Kazakevich and H.M. McNair
The excess adsorption isotherms of methanol–water and acetonitrile–water mixtures are compared for C4, C8, and C18 types of reversed-phase adsorbents with the same type of silica support (Hypersil). Adsorption behavior of the organic modifier is also measured for three different types of C8 adsorbents (Bakerbond, Supelcosil, and Hypersil) and on the Ultracarb-ODS at different temperatures. It is shown that the adsorption behavior of acetonitrile for all types of bonded phases is similar, but that of methanol shows an obvious dependence on the alkyl chain length of the bonded phase.
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