Determination of palladium in organic waste generated in the production of palladium catalyst by flame atomic absorption spectrometry

Based on a comparative study,there was no obvious difference in the determination of palladium in organic waste which was decomposed by HNO3-HClO4 or high-pressure digestion methods.But because high-pressure digestion was time-consuming,palladium in sample was decomposed with HNO3-HClO4 digestion method and determined by flame atomic absorption spectrometry(FAAS). The experimental results indicated that the absorption was directly proportional to the concentration of palladium in the range from 0.50 to 35.00 μg/mL under the optimal experimental conditions,and the linear equation was A=0.009 97+ 0.015 02ρ.The method has been applied to the determination of palladium in organic waste which was generated in the production of homogeneous phase catalyst for palladium.The relative standard deviation was 0.67%-1.2%.The recovery was 96%-104%.The proposed method is a satisfactory determination method for palladium recovery samples and deep processing products.