Evaluation of new high-frequency discharge lamps for atomic absorption and atomic fluorescence spectrometry of cadmium, lead and zinc

High-frequency discharge lamps with a hollow electrode are successfully utilized as the spectral line sources for atomic absorption and atomic fluorescence spectrometry of cadmium, lead and zinc. The sensitivities for atomic absorption spectrometry are superior to those obtained with commercially available hollow-cathode lamps by factors of 1.5 (Cd), 1.4 (Pb) and 1.6 (Zn). Detection limits for non-dispersive atomic fluorescence spectrometry with graphite furnace atomization are 1x10-13g (Cd), 3x10-11g (Pb) and 2x10-13g (Zn). The linear analytical range covers over four (Cd,Zn) and three (Pb) decades of concentration above the detection limits. (Auth.)