Preconcentration and determination of iron and copper in spice samples by cloud point extraction and flow injection flame atomic absorption spectrometry

Sahin C. A., Tokgoz I., Bektas S.

JOURNAL OF HAZARDOUS MATERIALS, cilt.181, ss.359-365, 2010 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 181
  • Basım Tarihi: 2010
  • Doi Numarası: 10.1016/j.jhazmat.2010.05.018
  • Dergi Adı: JOURNAL OF HAZARDOUS MATERIALS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.359-365
  • Anahtar Kelimeler: Cloud point extraction, Preconcentration, Flow injection, Iron, Copper, Flame atomic absorption spectrometry, Neutral Red, Spice samples, OPTICAL-EMISSION-SPECTROMETRY, MICELLE MEDIATED METHODOLOGY, SOLID-PHASE EXTRACTION, BIOLOGICAL SAMPLES, WATER SAMPLES, ONLINE INCORPORATION, NATURAL-WATERS, FOOD SAMPLES, CADMIUM, SEPARATION
  • Hacettepe Üniversitesi Adresli: Evet

Özet

A flow injection (FI) cloud point extraction (CPE) method for the determination of iron and copper by flame atomic absorption spectrometer (FAAS) has been improved. The analytes were complexed with 3-amino-7-dimethylamino-2-methylphenazine (Neutral Red, NR) and octylphenoxypolyethoxyethanol (Triton X-114) was added as a surfactant. The micellar solution was heated above 50 degrees C and loaded through a column packed with cotton for phase separation. Then the surfactant-rich phase was eluted using 0.05 mol L-1 H2SO4 and the analytes were determined by FAAS. Chemical and flow variables influencing the instrumental and extraction conditions were optimized. Under optimized conditions for 25 mL of preconcentrated solution, the enrichment factors were 98 and 69, the limits of detection (3s) were 0.7 and 0.3 ng mL(-1), the limits of quantification (10s) were 2.2 and 1.0 ng mL(-1) for iron and copper, respectively. The relative standard deviation (RSD) for ten replicate measurements of 10 ng mL(-1) iron and copper were 2.1% and 1.8%, respectively. The proposed method was successfully applied to determination of iron and copper in spice samples. (C) 2010 Elsevier B.V. All rights reserved.