Separation and preconcentration of Pb(II) using ionic liquid-modified silica and its determination by flame atomic absorption spectrometry

Ayata S., SEYHAN BOZKURT S., Ocakoglu K.

TALANTA, cilt.84, sa.1, ss.212-215, 2011 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 84 Sayı: 1
  • Basım Tarihi: 2011
  • Doi Numarası: 10.1016/j.talanta.2011.01.006
  • Dergi Adı: TALANTA
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.212-215
  • Anahtar Kelimeler: Ionic liquid, Lead, Solid phase extraction, Silica, Flame AAS, SOLID-PHASE EXTRACTION, CLOUD POINT EXTRACTION, WATER SAMPLES, TRACE LEAD, METAL, CADMIUM, GEL, SOLVENT, COPPER, MICROEXTRACTION
  • Dokuz Eylül Üniversitesi Adresli: Evet

Özet

A new method based on microcolumn packed with ionic liquid-modified silica combined with flame atomic absorption spectrometry has been developed for the determination of lead in environmental samples. Several factors influencing the preconcentration efficiency of lead and its subsequent determination, such as pH of the sample, flow rate, mass of ionic liquid, and interfering effect, have been investigated. Lead could be quantitatively retained by ionic liquid-modified silica in the pH range of 5-7, and then eluted completely with 3.0 mL 1.0 mol L-1 HCl. The detection limit of this method for lead was 0.7 mu g L-1 with preconcentration factor of 185, and the relative standard deviation (RSD) was 4.2% at 0.1 mu g mL(-1) Pb(II). This method has been applied for the determination of trace amount of lead in NIST standard reference material 2709 (San Joaquin Soil) and river water samples with satisfactory results. (c) 2011 Published by Elsevier B.V.