Organically modified silicas (Ormosils), which have an organic group covalently bonded into the silica network, were prepared from tetramethoxysilane (TMOS) and trimethoxysilane RSi(OMe)_3 in ethanol. The adsorption behavior of albumin on Ormosils in aqueous solutions was studied. It has been proved that Ormosils including HS group (TP) was most effective to the albumin adsorption, depending on the solution pH. The ratio of HS group to SiO_2 in TP (γ_(HS)) showed the optimum value for the albumin adsorption.
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