Abstract
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, 1-(2-pyridylazo)-2-naphthol or 4-(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.
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