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Solid Phase Extraction of Trace Elements in Water and Tissue Samples on a Mini Column with Diphenylcarbazone Impregnated Nano‐TiO 2 and Their Determination by Inductively Coupled Plasma Optical Emission Spectrometry
Author(s) -
Baytak Sıtkı,
Arslan Zikri
Publication year - 2015
Publication title -
clean – soil, air, water
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.444
H-Index - 66
eISSN - 1863-0669
pISSN - 1863-0650
DOI - 10.1002/clen.201400348
Subject(s) - inductively coupled plasma , trace (psycholinguistics) , extraction (chemistry) , materials science , nano , analytical chemistry (journal) , solid phase extraction , phase (matter) , inductively coupled plasma atomic emission spectroscopy , plasma , environmental chemistry , chromatography , chemistry , physics , composite material , quantum mechanics , philosophy , linguistics , organic chemistry
This study presents a simple, robust, and environmentally friendly solid phase extraction procedure for multi‐element determination by inductively coupled plasma optical emission spectrometry (ICP‐OES) using diphenylcarbazone (DPC) impregnated TiO 2 nanopowder ( n ‐TiO 2 ). DPC was successfully impregnated onto n ‐TiO 2 in a 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% HNO 3 (v/v). A mini‐column packed with 0.12 g DPC impregnated n ‐TiO 2 retained all elements quantitatively from an up to 250 mL multi‐element solution (2.5 μg per analyte) affording an enrichment factor of 125. The limits of detection for the preconcentration of 50 mL blank solutions ( n = 12) were 0.28, 0.15, 0.25, 0.22, 0.12, and 0.10 μg L −1 for Co, Cr, Cu, Fe, Mn, and Zn, respectively. The relative standard deviation 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 a 5 μg L −1 level. The method was validated with analysis of freshwater and lobster hepatopancreas certified reference materials, and then applied to the determination of the elements from tap water and lake water samples by ICP‐OES.