Abstract
The effect of inserting a pyrolytic graphite platform into a heated graphite atomizer HGA-2100 on the atomic emission of Mo, V, Al, Ni, Cu, Cr, Mn, Zn and Cd has been studied. A comparison of calibration curves obtained with and without the use of the platform showed that although the linear dynamic range is diminished by the use of the platform, atomic emission intensities are increased by as much as 23.5 times in the most favourable case (Al) studied. Whereas no detectable net emission signal could be obtained from 5.0 × 10 −9 kg of Zn and Cd atomized from the graphite tube wall, atomization and emission from the platform yielded limits of detection: 2.7 × 10 −12 kg for Zn and 4.0 × 10 −12 kg for Cd.
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