Bismuthiol II as an analytical reagent

Summary

Bismuthiol II has been found to be an effective reagent for the estimation of palladium in presence of Ru³⁺, OsO₄ ²⁻, Os⁴⁺, Ir⁴⁺ and Rh³⁺ at aph 6.6–8.0 with EDTA (disodium salt) as the masking agent and in presence of Au³⁺, OsO₄ ²⁻, Os⁴⁺ and Ir⁴⁺ atph 6–7 with thiosulphate as the complexing agent. Pd²⁺ and Pt⁴⁺ can be separated from each other by precipitation in presence of a tartrate (ph 6–8), when Pt⁴⁺ remains in solution or in presence of a cyanide (ph 5–6.5) when Pd²⁺ and Rh³⁺ are left behind.