Analytical applications of furnace atomisation non-thermal excitation spectrometry (FANES) and molecular non-thermal excitation spectrometry (MONES). Part 2. Determination of technetium-99 by FANES and electrothermal atomisation atomic absorption spectrometry

Abstract

The determination of trace amounts of ⁹⁹Tc was performed using electrothermal atomisation atomic absorption spectrometry (ETA-AAS) and furnace atomisation non-thermal excitation spectrometry (FANES). The thermal and chemical conditions were optimised. Tube-wall atomisation and matrix modification with 0.05 M Ni(NO₃)₂ in 0.1 M HNO₃[forming Ni(TcO₄)₂] gave the best analytical results. The detection limits for ⁹⁹Tc were 85 and 90 pg by ETA-AAS and FANES, respectively.