Relative efficiency of platinum-group metals as chemical modifiers in the determination of selenium by electrothermal atomic absorption spectrometry

摘要

The influence of Pd, Pt, Rh, and Ir on the behavior of selenium in a graphite furnace during the determination by electrothermal atomic absorption spectrometry is studied. It is demonstrated that the loss of selenium at the stage of pyrolysis is proportional to the melting temperature of the platinum-group metal employed as the chemical modifier.