Modified fenton's reagent for the destruction of organic matter in the spectrophotometric determination of lead, cadmium and mercury in sodium carboxymethylcellulose

Abstract

A modification of Fenton's reagent has been applied successfully to the rapid and safe mineralisation of samples of up to 10 g of sodium carboxymethylcellulose in order to determine lead, cadmium and mercury by spectrophotometric methods based on the use of dithizone. Recoveries and reproducibility were satisfactory at the 0.05–1.5 p.p.m. levels.