Flame Atomic Absorption Spectrometry, coupled to FI is a widely used technique for assay of many elements in a variety of samples (Burguera and Burguera 2008, Hansen and Miró 2008).
Automated sample dilution, filtration and hydride generation is, without doubt, best performed in the FI mode (Chapter 1). Yet the advantages of programmable flow should be seriously considered, if sorbent extraction is to be used for matrix removal and analyte capture, since the SI format saves reagents, and allows precise tailoring of flow rates to dynamics of adsorbtion and elution.
Electrothermal Atomic Absorption Spectroscopy uses microliter sample volumes and operates discontinuously, making it ideally compatible with the microSI-LOV. A series of pioneering works by Hansen, Wang and Miró advanced this methodology for trace metal analysis in a variety of materials.
Hyphenation of ETAAS with sorbent extraction on renewable columns (Chapter 3), is a powerful technique suitable for trace analysis and speciation of metals.
Inductively Coupled Plasma Atomic Emission Spectrometry coupled to hydride generation (HG), has been widely automated in FI format, being used for trace analysis of hydride-forming elements (As,, Se, Bi, Ge, Pb, Se, Te, Sn) and volatile species (Au, Ag, Co, Cr, Cu, Fe. Ni, Os, Pd, Pt, Rh, Ru, Zn). A thorough review of the HG-ICP-AES technique is available (Pohl 2004). Since ICP is compatible with a continuous flow of gas, use of FI seems to be an obvious choice for the “front end” HG automation.