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

Bulletin of the Korean chemical society

O. N. Kononova¹  Zh. V. Dmitrieva¹  E. A. Plotnikova¹  A. G. Kholmogorov¹  S. V. Kachin¹  N. V. Danilenko¹ 

关键词: Gold;    Silver;    Anion exchanger;    Sorption;    Separation;   

DOI  :  

学科分类：化学（综合）

来源: Korean Chemical Society

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

【 授权许可】

Unknown