GF-AAS DETERMINATION OF MICROAMOUNTS OF LEAD IN AVIATION COPPER ALLOY

The sample was dissolved in a mixture of nitric acid and hydrofluoric acid then determined by graphite furnace atomic absorption spectrometry.Effects of acid,acid concentration and interfering elements on the accuracy of the determination of lead were tested.Method of standard addition was used to eliminate matrix effect and interferences of the coexisting impurities.The proposed method has been applied to the determination of lead in the aviation copper alloy.Recovery was ranged in 90.5%-113.0%.The method was proved to be simple and rapid.