Cloud point extraction for the determination of copper in environmental samples by flame atomic absorption spectrometry

Shokrollahi A., Ghaedi M., Gharaghani S., Fathi M. R., SOYLAK M.

QUIMICA NOVA, cilt.31, sa.1, ss.70-74, 2008 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 31 Sayı: 1
  • Basım Tarihi: 2008
  • Doi Numarası: 10.1590/s0100-40422008000100015
  • Dergi Adı: QUIMICA NOVA
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.70-74
  • Anahtar Kelimeler: 4-hydroxy-2-mereapto-6-propylpyrimidine, cloud point extraction, copper ion, SENSITIZED SPECTROPHOTOMETRIC DETERMINATION, SOLID-PHASE EXTRACTION, TRACE AMOUNTS, SIMULTANEOUS PRECONCENTRATION, CADMIUM DETERMINATION, REAL SAMPLES, HEAVY-METALS, SEPARATION, COBALT, LEAD
  • Erciyes Üniversitesi Adresli: Evet

Özet

A simple cloud point extraction procedure is presented for the preconcentration of copper in various samples. After complexation by 4-hydroxy-2-mercapto-6-propylpyrimidine (PTU), copper ions are quantitatively extracted into the phase rich in Triton X-114 after centrifugation. Methanol acidified with 0.5 mol L-1 HNO3 was added to the surfactant-rich phase prior to its analysis by flame atomic absorption spectrometry (FAAS). Analytical parameters including concentrations for PTU, Triton X-114 and HNO3, bath temperature, centrifugation rate and time were optimized. The influences of the matrix ions on the recoveries of copper ions were investigated. The detection limits (3SD(b)/m, n=4) of 1.6 ng mL(-1) along with enrichment factors of 30 for Cu were achieved. The proposed procedure was applied to the analysis of environmental samples.