Electrothermal vaporization for inductively coupled plasma mass spectrometry and atomic absorption spectrometry: symbiotic analytical techniques. Invited lecture

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Abstract
New techniques have been developed for investigating fundamental phenomena occurring during electrothermal vaporization (ETV) as applied to atomic absorption spectrometry (AAS) and inductively coupled plasma mass spectrometry (ICP-MS). The different nature of electrothermal AAS (ETAAS) and ETV-ICP-MS data make possible the melding of information from both techniques in order to differentiate solid-phase and gas-phase chemical reactions leading to vaporization and atomization and elucidate the mechanism of matrix interferences and the chemistry involved in chemical modification. The significance of chemical modification for ETV-ICP-MS is demonstrated and the use of ETV-ICP-MS in assisting ETAAS for rapid method development is shown. The importance of mass transport effects in ETV-ICP-MS is demonstrated, which indicates that knowledge of the physical and chemical form of the analyte and matrix components is important to the practical application of ETV-ICP-MS to chemical analysis. Non-spectroscopic or matrix interferences in ETV-ICP-MS are more severe than in solution nebulization ICP-MS.

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