Cloud point extraction for the determination of copper, nickel and cobalt ions in environmental samples by flame atomic absorption spectrometry


ghaedi M., Shokrollahi A., Ahmadi F., Rajabi H. R., SOYLAK M.

JOURNAL OF HAZARDOUS MATERIALS, cilt.150, sa.3, ss.533-540, 2008 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 150 Sayı: 3
  • Basım Tarihi: 2008
  • Doi Numarası: 10.1016/j.jhazmat.2007.05.029
  • Dergi Adı: JOURNAL OF HAZARDOUS MATERIALS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.533-540
  • Anahtar Kelimeler: methyl-2-pyridylketone oxime (MPKO), cloud point extraction, triton X-114, flame atomic absorption spectrometry, SENSITIZED SPECTROPHOTOMETRIC DETERMINATION, NONIONIC SURFACTANT, WATER SAMPLES, SIMULTANEOUS PRECONCENTRATION, LIQUID-LIQUID, LEAD, CHROMIUM, CADMIUM, PB, CD
  • Erciyes Üniversitesi Adresli: Evet

Özet

A cloud point extraction procedure was presented for the preconcentration of copper, nickel and cobalt ions in various samples. After complexation with methyl-2-pyridylketone oxime (MPKO) in basic medium, analyte ions are quantitatively extracted to the phase rich in Triton X-114 following centrifugation. 1.0 mol L-1 HNO3 nitric acid in methanol was added to the surfactant-rich phase prior to its analysis by flame atomic absorption spectrometry (FAAS). The adopted concentrations for MPKO, Triton X- 114 and HNO3, bath temperature, centrifuge rate and time were optimized. Detection limits (3 SDb/m) of 1.6, 2.1 and 1.9 ng mL(-1) for Cu2+ Co2+ and Ni2+ along with preconcentration factors of 30 and for these ions and enrichment factor of 65, 58 and 67 for Cu (2+), Ni2+ and Co2+, respectively. The high efficiency of cloud point extraction to carry out the determination of analytes in complex matrices was demonstrated. The proposed procedure was applied to the analysis of biological, natural and wastewater, soil and blood samples. (c) 2007 Elsevier B.V. All rights reserved.