Mustafa TUZEN, Yunus Emre UNSAL, Mustafa SOYLAK

2318

Speciation of chromium by the combination of dispersive liquid liquid microextraction and microsample injection flame atomic absorption spectrometry

Speciation of chromium by the combination of dispersive liquid liquid microextraction and microsample injection flame atomic absorption spectrometry

A microextraction procedure was established for the speciation of total Cr, Cr(III), and Cr(VI). Sudan blue II was used as a ligand for speciation works. Some factors affecting the recoveries of chromium species, including type of extraction and dispersive solvents, pH, ligand amount, extraction time, and matrix ions, were examined. Optimum −1values for the dispersive liquid liquid microextraction method were pH 6, LOD 0.34 μ g L , and preconcentration factor 400. Chromium(III) was quantitatively recovered under optimal conditions, while the recovery of chromium(VI) was below 10%. The relative standard deviation for Cr(III) determinations for the 10-replicate measurement of 0.3 μ g −1mL Cr(III) was 6.2%. The accuracy was verified using BCR-144R Sewage Sludge, IAEA 336 Lichen, and TMDA 25.3 certified water for trace elements. The procedure was applied to speciation of chromium in water samples. Total chromium was determined in various wheat, bread, and hair samples.
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Turkish Journal of Chemistry-Cover
  • ISSN: 1300-0527
  • Yayın Aralığı: Yılda 6 Sayı
  • Yayıncı: TÜBİTAK
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