Siberian Federal University

The titanium dioxide based sorbents were prepared by modifying polyhexamethylene guanidine, Ferrozine or Ferene S. Optimal conditions were found for concentration of iron(II). The sorbents quantitatively extract the iron(II) from solutions of pH 2.0–5.0 during 10 min. Intensely colored iron(II) complexes are formed on the sorbents surface during sorption from solutions of pH 3.0–5.0 on TiO2-PHMG-Ferrozine and pH 2.5–5.0 on TiO2-PHMG-Ferene S. The diffuse reflectance spectra have maxima at 560 and 600 nm for the sorbents with the functional groups of Ferrozine and Ferene S, respectively. This effect was suggested for development of procedures of sorption-photometric determination of iron(II). The calibration curves are linear in the range of 0.1–3.5 μg/0.1 g TiO2- PHMG-Ferrozine and 0.1–4.0 μg/0.1 g TiO2-PHMG-Ferene S. The detection limits of Fe (II) equal to 0.05 μg/0.1g on the sorbent TiO2-PHMG-Ferrozine and 0.04 μg/0.1g on the sorbent TiO2-PHMGFerene S. Technique is used for the determination of iron in drinking waters