Colorimetric method

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 rate constant




  Alexander Gogos

  EAWAG, Switzerland