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Optimization of dispersive liquid-liquid microextraction of copper (II) by atomic absorption spectrometry as its oxinate chelate: Application to determination of copper in different water samples

Farajzadeh, Mir Ali; Bahram, Morteza; Mehr, Behzad Ghorbani and Jönsson, Jan Åke LU (2008) In Talanta 75(3). p.832-840
Abstract
In this study a dispersive liquid-liquid microextraction (DLLME) method based on the dispersion of an extraction solvent into aqueous phase in the presence of a dispersive solvent was investigated for the preconcentration of Cu2+ ions. 8-Hydroxy quinoline was used as a chelating agent prior to extraction. Flame atomic absorption spectrometry using an acetylene-air flame was used for quantitation of the analyte after preconcentration. The effect of various experimental parameters on the extraction was investigated using two optimization methods, one variable at a time and central composite design. The experimental design was performed at five levels of the operating parameters. Nearly the same results for optimization were obtained using... (More)
In this study a dispersive liquid-liquid microextraction (DLLME) method based on the dispersion of an extraction solvent into aqueous phase in the presence of a dispersive solvent was investigated for the preconcentration of Cu2+ ions. 8-Hydroxy quinoline was used as a chelating agent prior to extraction. Flame atomic absorption spectrometry using an acetylene-air flame was used for quantitation of the analyte after preconcentration. The effect of various experimental parameters on the extraction was investigated using two optimization methods, one variable at a time and central composite design. The experimental design was performed at five levels of the operating parameters. Nearly the same results for optimization were obtained using both methods: sample size 5 mL; volume of dispersive solvent 1.5 mL; dispersive solvent methanol; extracting solvent chloroform; extracting solvent volume 250 mu L; 8-hydroxy quinoline concentration and salt amount do not affect significantly the extraction. Under the optimum conditions the calibration graph was linear over the range 50-2000 mu g L-1. The relative standard deviation was 5.1% for six repeated determinations at a concentration of 500 mu g L-1. The limit of detection (S/N = 3) was 3 mu g L-1. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
central composite design, a time, one variable at, dispersive liquid-liquid microextraction, optimization, copper ion determination, atomic absorption spectrometry
in
Talanta
volume
75
issue
3
pages
832 - 840
publisher
Elsevier
external identifiers
  • wos:000255828800035
  • scopus:41649090146
ISSN
1873-3573
DOI
10.1016/j.talanta.2007.12.035
language
English
LU publication?
yes
id
69094c81-04cd-46e1-ab15-fd0ca4b2e4fc (old id 1203542)
date added to LUP
2008-09-17 09:30:11
date last changed
2017-08-27 04:53:03
@article{69094c81-04cd-46e1-ab15-fd0ca4b2e4fc,
  abstract     = {In this study a dispersive liquid-liquid microextraction (DLLME) method based on the dispersion of an extraction solvent into aqueous phase in the presence of a dispersive solvent was investigated for the preconcentration of Cu2+ ions. 8-Hydroxy quinoline was used as a chelating agent prior to extraction. Flame atomic absorption spectrometry using an acetylene-air flame was used for quantitation of the analyte after preconcentration. The effect of various experimental parameters on the extraction was investigated using two optimization methods, one variable at a time and central composite design. The experimental design was performed at five levels of the operating parameters. Nearly the same results for optimization were obtained using both methods: sample size 5 mL; volume of dispersive solvent 1.5 mL; dispersive solvent methanol; extracting solvent chloroform; extracting solvent volume 250 mu L; 8-hydroxy quinoline concentration and salt amount do not affect significantly the extraction. Under the optimum conditions the calibration graph was linear over the range 50-2000 mu g L-1. The relative standard deviation was 5.1% for six repeated determinations at a concentration of 500 mu g L-1. The limit of detection (S/N = 3) was 3 mu g L-1.},
  author       = {Farajzadeh, Mir Ali and Bahram, Morteza and Mehr, Behzad Ghorbani and Jönsson, Jan Åke},
  issn         = {1873-3573},
  keyword      = {central composite design,a time,one variable at,dispersive liquid-liquid microextraction,optimization,copper ion determination,atomic absorption spectrometry},
  language     = {eng},
  number       = {3},
  pages        = {832--840},
  publisher    = {Elsevier},
  series       = {Talanta},
  title        = {Optimization of dispersive liquid-liquid microextraction of copper (II) by atomic absorption spectrometry as its oxinate chelate: Application to determination of copper in different water samples},
  url          = {http://dx.doi.org/10.1016/j.talanta.2007.12.035},
  volume       = {75},
  year         = {2008},
}