![]() Therefore, the use of a continuum light source in AAS would obliterate the analytical specificity afforded by the technique: anything present in the sample that absorbs light in the region of overlap of (a) the emission wavelength range of the light source and (b) the wavelength range of sensitivity of the detector would be recorded in a given measurement. 1.2 Types The field of atomic absorption spectroscopy (AAS) includes: flame (FAAS) and electrothermal (EAAS or ETAAS) atomic absorption spectroscopy (Skoog et al., 2008). The energy source most frequently used in atomic absorption spectroscopy is the hollow-cathode lamp. In AAS, any light that is passed through the sample has the potential to be absorbed by anything present in the sample. Hollow cathode lamps emit light that is specific to the element, and this light is directed through the flame to allow for measurement during atomization. this procedure improves the results obtained with individual lamps.While the "fingerprint" wavelengths of each element are highly specific, they often sit at wavelengths close to those of other elements. Agilent offers a broad range of single element atomic absorption lamps, including zinc lamps, cadmium lamps and lead lamps. flame atomic absorption spectroscopy (faas) nebulisers play an important role in sensitivity most critical part of instrument. The hollow cathode lamp (HCL) achieves this by using a high-energy discharge to stimulate emission from the element of interest. ![]()
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