A green, novel and simple microprecipitation technique for separation and preconcentration of cadmium with 1-(2-thiazolylazo)-2-naphthol in food samples and determination by microsampling flame atomic absorption spectrometry


ALOTHMAN Z. A. , HABILA M. A. , ALFADUL S. M. , YILMAZ E. , SOYLAK M.

ANALYTICAL METHODS, cilt.8, ss.3545-3549, 2016 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 8 Konu: 17
  • Basım Tarihi: 2016
  • Doi Numarası: 10.1039/c5ay03323c
  • Dergi Adı: ANALYTICAL METHODS
  • Sayfa Sayıları: ss.3545-3549

Özet

A microprecipitation is developed by using Cd(II)-1-(2-thiazolylazo)-2-naphthol (TAN) microprecipitate for the preconcentration of cadmium at trace levels. This condition facilitates phase separation, and the aqueous phase can be removed with a syringe, while the remaining solid particles are dissolved in concentrated nitric acid and introduced into a flame atomic absorption spectrometer using a microinjection system for Cd(II) determination. Quantitative recovery values for cadmium were obtained at pH 8. The method offered a limit of detection (LOD) of 0.25 mu g L (1), a limit of quantification (LOQ) of 0.83 mu g L (1) and a relative standard deviation (RSD) of 5.5%. The procedure was validated by addition/recovery tests and by applying bovine liver certified reference materials. The method was successfully applied to the preconcentration and determination of cadmium in food samples.