Adsorption and Complexing Properties of Silicas with Analytical Reagents Grafted via the Mannich Reaction

摘要

The pre-concentration of metal ions such as Pb(II), Cd(II), Zn(II), Hg(II) and Mo(VI) on silicas with covalently bound 8-hydroxyquinoline, l-(2-pyridylazo)-2-naphthol or4-(2-pyridylazo)resorcinol has been studied. The structures of metal-ion complexes with grafted phenolic-type analytical reagents were investigated by IR, ESR and electronic diffuse reflectance spectroscopies.