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

摘要

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 mug/mL.The presence of Cu(II),Co(II),Fe(II) do not hinder this determination.Au(III) was determined in industrial solutions.