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Study on the extraction mechanism and the optimization of extraction method for Chromium using anion exchangers
Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
1994, v.7 no.3, pp.387-393
Kim,
S., Kim,
D., Kim,
Y., &
Lim,
H.
(1994). Study on the extraction mechanism and the optimization of extraction method for Chromium using anion exchangers. Analytical Science and Technology, 7(3), 387-393.
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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
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