A pre-concentration procedure using coprecipitation for detennination of lead and iron in several samples using flame atomic absorption spectrometry


saraçoğlu s. , Soylak M. , Peker D. S. K. , Elci L. , dos Santos W. N. L. , Lemos V. A. , ...More

ANALYTICA CHIMICA ACTA, vol.575, no.1, pp.133-137, 2006 (Journal Indexed in SCI) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 575 Issue: 1
  • Publication Date: 2006
  • Doi Number: 10.1016/j.aca.2006.05.055
  • Title of Journal : ANALYTICA CHIMICA ACTA
  • Page Numbers: pp.133-137
  • Keywords: pre-concentration, coprecipitation, iron, lead, factorial design, SOLID-PHASE EXTRACTION, CLOUD-POINT EXTRACTION, FACTORIAL DESIGN, WATER SAMPLES, AMBERLITE XAD-4, NATURAL-WATERS, HEAVY-METALS, OPTIMIZATION, NICKEL, SYSTEM

Abstract

The present paper proposes a pre-concentration procedure for determination of lead and iron in several samples by flame atomic absorption spectrometry. In it, lead(II) and iron(III) ions are coprecipitated using the violuric acid-copper(H) system as collector. Afterwards, the precipitate is dissolved with 1 M HNO3 solution and the metal ions are determined. The optimization step was performed using factorial design involving the variables: pH, violuric acid mass (VA) and copper concentration (Cu).