The colorimetric analytical method is based on selective dissolution of Cu(x)S and subsequent spectrophotometric quantification of the released Cu2+ allowing the assessment of CuO sulfidation rates at micro-molar concentrations. 

1. Reaction is quenched by an excess of AgNO³
2. Remaining Ag dissolves Cu(x)S phases, releasing Cu²⁺
3. Cu²⁺ is quantified colorimetrically using Zincon
 

 

 

 

 

Used in

Sulfidation

Sulfidation rate constant

 

Contact

  Alexander Gogos

  EAWAG, Switzerland