Flow injection hydride applications

B. Hilligsoe and E. H. Hansen, Application of factorial designs and simplex optimisation in the development of flow injection-hydride generation-graphite furnace atomic absorption spectrometry (FI-HG-GFAAS) procedures as demonstrated for the determination of trace levels of germanium, Fresenius J. Anal. Chem., 358(7-8), 1997, 775-780. 

Application of factorial designs and simplex optimisation in the development of flow injection-hydride generation-graphite furnace atomic aljsorption spectrometry (FI-HG-GFAAS) procedures. 

Other techniques like hydride-generation, flow-injection techniques or solid sample introduction are highly specialized and up to now not applicable to routine analysis. 

Recent improvements in FAAS include the addition of a flow injection sample delivery system. This allows for automatic dilution and reagent addition, and also provides for automated cold vapour or hydride generation needed for As, Se and Hg (e g., Saraswati et al., 1995). Other new techniques are improving the sensitivity of FAAS. A slotted silica tube placed in the flame improves the sensitivity 8 fold forCd and c. 3 fold forCu, Pb, and Zn. Experimental application of graphite tubes in the flame can improve Pb sensitivity 50 fold (Alvarado Jaffe, 1998). 

Bings N. H., Steeanka Z. and Mallada S. R. (2003) Flow injection electrochemical hydride generation inductively coupled plasma time-of flight mass spectrometry for the simultaneous determination of hydride-forming elements and its application to the analysis of fresh water samples. Anal. Chim. Acta 479 203-214. 

Centineo, G., Bayon, M. M., and Sanz-Medel, A. (2000) Flow injection analysis with inductively coupled plasma time-of-flight mass spectrometry for the simultaneous determination of elements forming hydrides and its application to urine. J. Anal. At. Spectrom., 15, 1357. 

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