NEW DEVELOPMENTS IN FLOW-INJECTION SEPARATION AND PRECONCENTRATION TECHNIQUES FOR ELECTROTHERMAL ATOMIC-ABSORPTION SPECTROMETRY

Flow injection (FI) on-line separation and preconcentration systems fo r electrothermal atomic absorption spectrometry (ETAAS) are reviewed, highlighting the main developments in the field since 1990 and work ac hieved in the authors' laboratory. These include developments in on-li ne preconcentration systems based on column techniques, solvent extrac tion, coprecipitation and hydride sequestration. Advantages, limitatio ns and potentials of the FI-ETAAS combination are discussed.