Bulletin of the Korean Chemical Society

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Sorption and Separation of Thiocyanate Gold and Silver Complexes and Determination of Gold by Diffuse Reflectance Spectroscopy

  • Danilenko, N.V. (Dept. of Chemistry, Krasnoyarsk State University) ;
  • Kononova, O.N. (Dept. of Chemistry, Krasnoyarsk State University) ;
  • Kachin, S.V. (Dept. of Chemistry, Krasnoyarsk State University) ;
  • Kholmogorov, A.G. (Institute of Chemistry and Chemical Technology, Siberian Dept. of the Russian Academy of Science) ;
  • Dmitrieva, Zh.V. (Dept. of Chemistry, Krasnoyarsk State University) ;
  • Plotnikova, E.A. (Dept. of Chemistry, Krasnoyarsk State University)
  • Published : 2004.07.20
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Abstract

The present paper is focused on simultaneous sorption concentration of gold (III) and silver (I) from thiocyanate solutions using high-selective anion exchanger AN-25 and subsequent separation of these ions at various concentrations of thiocarbamide (eluent). As a result, silver (I) ions are completely eluted from AN-25 and gold (III) ions remain in the resin phase and can be determined directly in the solid phase by diffuse reflection spectroscopy. It is proposed to use the sorption-spectroscopic method for Au(III) determination in aqueous solutions. The calibration curve is linear in the concentration range of 1-19 mg/L (sample volume is 10.0 mL) and the detection limit is 0.05 ${\mu}g/mL$. The presence of Cu(II), Co(II), Fe(II) do not hinder this determination. Au(III) was determined in industrial solutions.

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References

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