title: Solid Phase Extraction of Trace Elements in Waterand Tissue Samples on a Mini Column with Diphenylcarbazone Impregnated Nano-TiO2and Their Determination by Inductively Coupled Plasma Optical Emission Spectrometry.
abstract: This study presents a simple, robust and environmentally friendly solid phase preconcentration procedure for multielement determination by inductively coupled plasma optical emission spectrometry (ICP-OES) using diphenylcarbazone (DPC) impregnated TiO2nanopowder (n-TiO2). DPC was successfully impregnated onton-TiO2in colloidal solution. A number of elements, including Co(II), Cr(III), Cu(II), Fe(III), Mn(II) and Zn(II) were quantitatively preconcentrated from aqueous solutions between pH 8 and 8.5 at a flow rate of 2 mL min-1, and then eluted with 2 mL of 5% (v/v) HNO3. A mini-column packed with 0.12 g DPC impregnatedn-TiO2retained all elements quantitatively from up to 250 mL multielement solution (2.5 μg per analyte) affording an enrichment factor of 125. The limits of detection (LOD) for preconcentration of 50 mL blank solutions (n = 12) were 0.28, 0.15, 0.25, 0.22, 0.12, and 0.10 μg L-1for Co, Cr, Cu, Fe, Mn, and Zn, respectively. The relative standard deviation (RSD) for five replicate determinations was 0.8, 3.4, 2.6, 2.2, 1.2 and 3.3% for Co, Cr, Cu, Fe, Mn and Zn, respectively, at 5 μg L-1level. The method was validated with analysis of Freshwater (SRM 1643e) and Lobster hepatopancreas (TORT-2) certified reference materials, and then applied to the determination of the elements from tap water and lake water samples by ICP-OES.
authors.affiliation: Department of Chemical Engineering, Faculty of Engineering, Süleyman Demirel University, Isparta 32260, Turkey.
authors.forename: Sıtkı
authors.initials: S
authors.lastname: Baytak
authors.affiliation: Department of Chemistry and Biochemistry, Jackson State University, Jackson, MS 39217, USA.
authors.forename: Zikri
authors.initials: Z
authors.lastname: Arslan
keywords: Diphenylcarbazone; Inductively coupled plasma optical emission spectrometry; Solid phase extraction; TiO2 nanoparticle; Trace element