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Updated: Jun 28, 2026

Diffuse Reflectance Infrared Spectroscopic Identification of Dispersant/Particle Bonding Mechanisms in Functional Inks
Published on: May 8, 2015
Xylenol orange adsorbed on silica surface as a solid phase reagent for lead determination using diffuse reflectance
O A Zaporozhets1, L Ye Tsyukalo
1Analytical Chemistry Department, Taras Shevchenko Kyiv University, Volodymyr'ska Str. 64, 01033 Kyiv, Ukraine.
Abstract:
The solid-phase reagents on the base of xylenol orange and its complex with Fe(III) immobilized on silica surface were obtained. The interaction of Pb(II) with developed reagents was studied. The conditions of quantitative recovery of Pb(II) from diluted solutions, such as acidity of aqueous phase, the amount of the sorbent, the volume of solutions and the time of equilibrium reaching, were examined. The tolerance limits of metal ions in the sorption of Pb(II) at pH 4.5-5.5 are reported. The capabilities of immobilized xylenol orange for Pb(II) pre-concentration prior to its diffusion reflectance spectroscopic detection was evaluated. The detection limit was 2 mug l(-1). The developed method was applied to Pb(II) determination in natural water and foodstuffs.
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