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PE 4110ZL GFAA

In GFAA, approximately 20 mL of sample is placed in a pyrolitically coated graphite tube and heated very rapidly to 1500-2600^oC in order to atomize elements in the sample. Light, of a wavelength specific to a particular element and of very narrow bandwidth, is directed down the tube. The amount of light absorbed by the atomized sample is proportional to its concentration in solution. This technique provides an alternative to ICPMS in measuring the concentration of trace metals, although ICPMS is usually much more sensitive and has a much wider working range than GFAA. Interferences, particularly matrix effects, are controlled in GFAA using matrix modifiers and experimental conditions known as Stabilized Temperature Platform (STPF).

Update 11/2005:  WCAS no longer offers GFAA

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