Simultaneous determination of osmium, ruthenium, copper and lead by electrocatalytic voltammetry

► Os and Ru simultaneous voltammetric determination: method set up and validation. ► Interference problem from Cu and Pb in the Os and Ru voltammetric determination. ► Solution of the interference problem from Cu and Pb. ► Simultaneous voltammetric determination of Os, Ru, Cu, Pb: set up and validation. ► Application of the method to fresh and sea water.