Separation of Cr(III) and Cr(VI) using melamine-formaldehyde resin and determination of both species in water by FAAS


Demirata B., Tor I., Filik H., Afsar H.

FRESENIUS JOURNAL OF ANALYTICAL CHEMISTRY, vol.356, no.6, pp.375-377, 1996 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 356 Issue: 6
  • Publication Date: 1996
  • Doi Number: 10.1007/s0021663560375
  • Title of Journal : FRESENIUS JOURNAL OF ANALYTICAL CHEMISTRY
  • Page Numbers: pp.375-377

Abstract

A method is described for the determination of Cr(VI) and total chromium by FAAS. Cr(VI) is separated from Cr(III) by adsorption on melamine-formaldehyde resin. After elution of Cr(VI) with 0.1 mol/l NaAc solution, it is analysed by FAAS. Total chromium is determined by FAAS after conversion of Cr(III) to Cr(VI) by oxidation with hydrogen peroxide, total Cr(VI) is concentrated as above. If the total concentration of chromium is sufficient, the determination can be directly made by FAAS. Cr(III) can then be calculated by subtracting Cr(VI) from the total Cr. This method was successfully applied to the determination of chromium in lake water.