Supramolecular microextraction of cobalt from water samples before its microsampling flame atomic absorption spectrometric detection

ALOthman Z., Habila M., YILMAZ E., Al-Harbi N. M., SOYLAK M.

INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY, cilt.95, sa.14, ss.1311-1320, 2015 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 95 Sayı: 14
  • Basım Tarihi: 2015
  • Doi Numarası: 10.1080/03067319.2015.1090568
  • Dergi Adı: INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.1311-1320
  • Anahtar Kelimeler: Supramolecular solvent microextraction, cobalt, N-Benzoyl-N, N-diisobutylthiourea, microsampling flame atomic absorption spectrometry, water samples, SOLID-PHASE EXTRACTION, TABLE SALT SAMPLES, ENVIRONMENTAL-SAMPLES, AMBERLITE XAD-16, SOLVENT MICROEXTRACTION, COPRECIPITATION SYSTEM, NATURAL-WATER, TRACE AMOUNTS, PRECONCENTRATION, CADMIUM
  • Erciyes Üniversitesi Adresli: Evet

Özet

The supramolecular solvent system consists of tetrahydrofuran (THF) and 1-decanol, that was used as an extraction solvent for a microextraction procedure for the preconcentration and separation of Co(II). The proposed supramolecular-based procedure was combined with microsampling flame atomic absorption spectrometry for the determination of cobalt at trace levels in water samples. N-Benzoyl-N,N-diisobutylthiourea was used to chelate Co(II) in an aqueous solution. Quantitative extraction efficiency was obtained at pH 6.5. The effects of analytical parameters including pH, amount of ligand, type, ratio and volume of supramolecular solvent, sample volume and interfering ions were investigated for optimisation of the procedure. The proposed supramolecular solvent-based microextraction procedure (Ss-ME) exhibits a limit of detection (LOD) of 1.29 mu gL(-1) and a limit of quantification (LOQ) of 3.88 mu gL(-1). The procedure was validated by addition/recovery tests and by applying TMDA 64.2 and TMDA 53.3 water certified reference materials. The microextraction method was successfully applied for the preconcentration and determination of cobalt in water samples.