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, vol.8, no.17, pp.3545-3549, 2016 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 8 Issue: 17
  • Publication Date: 2016
  • Doi Number: 10.1039/c5ay03323c
  • Journal Name: ANALYTICAL METHODS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.3545-3549
  • Erciyes University Affiliated: Yes

Abstract

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.