期刊
TALANTA
卷 82, 期 1, 页码 208-212出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.talanta.2010.04.020
关键词
Vanadium determination; Liquid-liquid microextraction; Preconcentration/separation; Electrothermal atomic absorption; spectrometry
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 mu L, 200 mu L 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. (C) 2010 Elsevier B.V. All rights reserved.
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