Simultaneous determination of silver and copper by flame atomic absorption spectrometry with alternate irradiation by two hollow cathode lamps

Abstract

The simultaneous flame atomic absorption spectrometric determination of silver and copper is described. The resonance lines of both silver (328.07 nm) and copper (327.40 nm) were introduced within the same bandpass of the monochromator. Therefore, it was possible to measure the absorption signals of silver and copper simultaneously, when the silver and copper hollow cathode lamps were alternately irradiated. Acquisition of the absorption data was synchronized with the irradiations using a computer. For the introduction of the sample into the flame, a discrete nebulization method was investigated in order to minimize the sample volume required and the analysis time.