Evaluation of Uncertainty for Determination of Pd in Aluminum Oxide Catalyst by FAAS

The uncertainty for determination of Pd in aluminum oxide catalyst by FAAS was evaluated.The main influential factors of the uncertainty were determined,such as sample weighting,process of digestion,volume of test solution,standard solution,standard curve fitting.Each partial uncertainty of measurement was calculated and combined.It was indicated that the main source of uncertainty comes from the process of digestion and standard curve fitting.The standard uncertainty of 21 g/t and the extended uncertainty of 42 g/t were obtained,and the measurement result of wPd±U(Pd)=(3028±42) g/t was given.