Automated determination of tin and nickel in brass by on-line anodic electrodissolution and electrothermal atomic absorption spectrometry

摘要: Abstract The application of an on-line metallic alloy dissolution system using anodic electrodissolution in a flow injection for the determination tin and nickel copper alloys is described. After electrolyzed material was collected autosampler cup, carried out electrothermal atomic absorption spectrometry (ETAAS). Using specific software developed Turbo Pascal 7.0, it possible to control electrolysis time, intensity applied current, triggering three-way solenoid valves that push fluids. Through manipulation these variables, adjust analytical signal within working range spectrometer. Calibration spectrometer accomplished by processing reference material. For tin, relative standard deviations series measurements (n=5) performed on same point different points sample smaller than 2 4%, respectively; nickel, 5%, respectively. results were good agreement with those obtained through classical methodology, as well data optical emission spectrometry. detection limit 0.001% (w/w), whereas 0.003% (w/w). throughput 30 samples h−1.