| The problem of decomposing Pd/C catalyst and its metallurgical waste materials, and determining of Pd content in them were discussed. These samples were ignited previously in order to remove carbon and other impurities, and then melted further by using potassium pyrosulfate. After that, the Pd content in them were determined by using complexometric titration and spectrophotometry, respectively. For the blank samples of Pd/C which had been ignited, the recovery of standard addition was between 99.4%~100.5%. It proved that palladium in these samples was not lost by igniting previously. The research results indicated that when these samples of Pd content above xx%, even if the composition of samples were complex, the method for determination of Pd should also select butanedione dioxime precipitation titration. But for samples of Pd content below 5%, regardless of the specimen composed of simple or complex by spectrophotometry and easy operation. |
