Comparison of sample introduction techniques with a continuously heated graphite-furnace atomizer for atomic-absorption spectrophotometry.

摘要: Abstract A graphite furnace is described which can be operated continuously at temperatures up to 2100°C or subjected a temperature ramp running 3100°C. Pyrolytic coating of the tubes with carbon before operation was found necessary ensure satisfactory life-time. Two methods sample introduction were investigated number salt solutions: continuous nebulization combined desolvation, constant temperature, and deposition material from an aerosol into 150°C for 10 sec conventional ramping procedure. The method offers ease operation, good precision (RSD = 1–1.3%) moderate sensitivity, but suffers extensive interferences. combines merits atomic-absorption easier 1.8–2.3%) higher sensitivity.