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Determination of Lead, Iron and Nickel in Water and Vegetable Samples after Preconcentration with Aspergillus niger Loaded on Silica Gel
Author(s) -
Baytak Sıtkı,
Koçyiǧit Abdurrahim,
Türker Ali Rehber
Publication year - 2007
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.200700124
Subject(s) - detection limit , chemistry , atomic absorption spectroscopy , nickel , analyte , aspergillus niger , chromatography , extraction (chemistry) , silica gel , analytical chemistry (journal) , biochemistry , physics , organic chemistry , quantum mechanics
A method for the determination of Fe(III), Pb(II), and Ni(II) by flame atomic absorption spectrometry (FAAS) after preconcentrating on a column containing Aspergillus niger loaded on silica gel 60 (Biosorbent) is described. The effect of experimental parameters such as pH, flow rate of sample solution, and volume of sample solution were investigated on the recovery of the analytes. The effect of interfering ions on the recovery of the analytes has also been investigated. Recoveries of Fe(III), Pb(II), and Ni(II) were (98 ± 2), (98 ± 3), (99 ± 2)% at the 95% confidence level, respectively. For the analytes, 50‐fold preconcentration was obtained. The analytical detection limits for Fe(III), Pb(II), and Ni(II) were 1.7, 5.2, and 1.6 ng/mL, respectively. The proposed method was applied to the determination of trace metals in various water and vegetable samples. The analytes have been determined with relative error lower than 7%.