Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10560114 | Talanta | 2011 | 5 Pages |
Abstract
A trace element preconcentration procedure is described utilizing a minicolumn of yeast (Yamadazyma spartinae) immobilized TiO2 nanoparticles for determination of Cr, Cu, Fe, Mn, Ni and Zn from water samples by inductively coupled plasma atomic emission spectrometry. The elements were quantitatively retained on the column between pH 6 and 8. Elution was made with 5% (v/v) HNO3 solution. Recoveries ranged from 98 ± 2 (Cr) to 100 ± 4 (Zn) for preconcentration of 50 mL multielement solution (50 μg Lâ1). The column made up of 100 mg sorbent (yeast immobilized TiO2 NP) offers a capacity to preconcentrate up to 500 mL of sample solution to achieve an enrichment factor of 250 with 2 mL of 5% (v/v) HNO3 eluent. The detection limits obtained from preconcentration of 50 mL blank solutions (5%, v/v, HNO3, n = 11) were 0.17, 0.45, 0.25, 0.15, 0.33 and 0.10 μg Lâ1 for Cr, Cu, Fe, Mn, Ni and Zn, respectively. Relative standard deviation (RSD) for five replicate analyses was better than 5%. The retention of the elements was not affected from up to 500 μg Lâ1 Na+ and K+ (as chlorides), 100 μg Lâ1 Ca2+ (as nitrate) and 50 μg Lâ1 Mg2+ (as sulfate). The method was validated by analysis of freshwater standard reference material (SRM 1643e) and applied to the determination of the elements from tap water and lake water samples.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Sıtkı Baytak, Fahmida Zereen, Zikri Arslan,