| : Samples were digestion by HNO3-HClO4 , then dissolved with HNO3-HCl. Using EDTA complexometric, ZnNO3 back titration by dioxime precipitation determinated palladium content in samples. The method discussed conditions of digestion by HNO3-HClO4. The results showed that the residual amount of HClO4 was within 1.0 mL, and the organic matter was decomposed completely by 3 times of smoke. The standard recovery rate was 99.66%~100.04%, and the relative standard deviation (RSD) was 0.28%. These results meet the requirements of determination palladium. |
