Solid phase extraction of ultra traces mercury (II) using octadecyl silica membrane disks modified by 1,3-bis(2-ethoxyphenyl)triazene (EPT) ligand and determination by cold vapor atomic absorption spectrometry
| Autor: | Mohammad Kazem Rofouei, Asieh Ahmadalinezhad, Hadis Ferdowsi, Alireza Sabouri |
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| Rok vydání: | 2011 |
| Předmět: |
Environmental Engineering
Calibration curve Health Toxicology and Mutagenesis Metal ions in aqueous solution Analytical chemistry chemistry.chemical_element Ligands Mass spectrometry Water Purification chemistry.chemical_compound Environmental Chemistry Solid phase extraction Organic Chemicals Triazene Cold vapour atomic fluorescence spectroscopy Waste Management and Disposal Ions Detection limit Triazines Spectrophotometry Atomic Solid Phase Extraction Membranes Artificial Mercury Hydrogen-Ion Concentration Silicon Dioxide Pollution Mercury (element) Models Chemical chemistry Calibration Solvents Water Pollutants Chemical |
| Zdroj: | Journal of Hazardous Materials. 192:1358-1363 |
| ISSN: | 0304-3894 |
| DOI: | 10.1016/j.jhazmat.2011.06.051 |
| Popis: | A facile and highly efficient method was developed for the preconcentration of the ultra trace amounts of mercury (II) ions. Octadecyl silica membrane disk was modified by the recently synthesized triazene ligand, 1,3-bis(2-ethoxyphenyl)triazene (EPT), and cold vapor atomic absorption spectrometry was used to determine the resultant preconcentrated Hg(II) ions. Solution studies with EPT and a series of metal ions were done in advance, and the results showed a strong affinity of EPT to the mercury ions. To perform solid phase extraction, various parameters such as pH of the sample, flow rates and the amount of the ligand were optimized. A linear calibration curve was obtained in the range of 0.02-1.90 μg L(-1) with r(2) = 0.9990 (n = 8), and the limit of detection (LOD) based on three times the standard deviation of the blank was 10.6 ng L(-1). The relative standard deviation (RSD) for the determination of 0.1 μg L(-1) Hg(II) found to be 2.9% while a RSD value of 1.1% was obtained for the determination of 1.0 μg L(-1) Hg(II) (n = 8). The preconcentration and improvement factors were 380 and 74, respectively. The newly developed method was successfully applied to the determination of mercury ions in real water samples. |
| Databáze: | OpenAIRE |
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