Study on the extraction mechanism and the optimization of extraction method for Chromium using anion exchangers

음이온 교환체를 이용한 크롬의 추출메카니즘 및 추출방법 최적화에 관한 연구

  • Kim, S.W. (Department of Chemistry, Dankook University) ;
  • Kim, D.M. (Department of Chemistry, Dankook University) ;
  • Kim, Y.S. (Department of Chemistry, Korea University) ;
  • Lim, H.B. (Department of Chemistry, Dankook University)
  • Received : 1994.09.02
  • Published : 1994.09.25

Abstract

Quantitative analytical conditions for chromium using solvent extraction followed by atomic absorption spectrometry was studied. Trioctylamine(TOA) in tertiary amine or Trioctylmethylammoniumchloride(TOMAC) in quaternary ammonium salt, both containing octyl group was used as an anion exchangers. Absorbance were measured for the different kinds of acid added and as changing the concentration of acid by graphite furnace atomic absorption spectrometer. The maximum absorbance was obtained at the concentrations of HCl, 0.1M to 0.3M for TOA and 0.03M to 0.1M for TOMAC. Mole ratios over 1:1 of TOA or TOMAC dissolved in MIBK solution to chromium in sample shows optimum extraction efficiency while HCl was added to the MIBK. As a result of scrutinizing the extraction process, the methods employed in this experiment turned out to be better extraction efficiency for chromium, compared to similar extraction methods.

Keywords

solvent extraction;chromium;atomic absorption spectrometry