Separation/preconcentration and determination of vanadium with dispersive liquid–liquid microextraction based on solidification of floating organic drop (DLLME-SFO) and electrothermal atomic absorption spectrometry
| Autor: | Tahereh Asadollahi, Shayessteh Dadfarnia, Ali Mohammad Haji Shabani |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
Detection limit
Time Factors Chromatography Calibration curve Spectrophotometry Atomic Temperature Analytical chemistry Vanadium chemistry.chemical_element Chemical Fractionation Hydrogen-Ion Concentration Hydroxylamines Mass spectrometry Analytical Chemistry law.invention Standard curve chemistry law Solvents Salts Sample preparation Enrichment factor Atomic absorption spectroscopy |
| Zdroj: | Talanta. 82:208-212 |
| ISSN: | 0039-9140 |
| DOI: | 10.1016/j.talanta.2010.04.020 |
| Popis: | A novel dispersive liquid-liquid microextraction based on solidification of floating organic drop (DLLME-SFO) for separation/preconcentration of ultra trace amount of vanadium and its determination with the electrothermal atomic absorption spectrometry (ETAAS) was developed. The DLLME-SFO behavior of vanadium (V) using N-benzoyl-N-phenylhydroxylamine (BPHA) as complexing agent was systematically investigated. The factors influencing the complex formation and extraction by DLLME-SFO method were optimized. Under the optimized conditions: 100 microL, 200 microL and 25 mL of extraction solvent (1-undecanol), disperser solvent (acetone) and sample volume, respectively, an enrichment factor of 184, a detection limit (based on 3S(b)/m) of 7 ng L(-1) and a relative standard deviation of 4.6% (at 500 ng L(-1)) were obtained. The calibration graph using the preconcentration system for vanadium was linear from 20 to 1000 ng L(-1) with a correlation coefficient of 0.9996. The method was successfully applied for the determination of vanadium in water and parsley. |
| Databáze: | OpenAIRE |
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