C. Winstead, F. Mazzotti, J. Mierzwa, G. P. Miller
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Preliminary results for electrothermal atomization-cavity ringdown spectroscopy (ETA-CRDS)
We report the first experimental results using electrothermal atomization-cavity ringdown spectroscopy for trace elemental analysis. Lead aqueous standard solutions were analyzed using graphite furnace-cavity ringdown spectroscopy and a preliminary detection limit of approximately 1 pg was obtained for peak height absorption measurements. No chemical matrix modifiers were used. These preliminary results together with an estimate of theoretical detection limits suggest that the coupling of ETA and CRDS has the potential to become a valuable new technique in analytical atomic spectrometry.
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