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4. The continuous emissions from a deuterium lamp and the hollow cathode lamp (HCL)
emissions are both directed through the flame or furnace by a chopping mirror. The HCL
emissions are absorbed by the analyte atoms and scattered or absorbed by the sample
matrix. Since the bandwidth of the monochromator is large compared to the analyte
absorption line width, any attenuation of the deuterium radiation is primarily a result of
broad-band absorption or scattering by the sample matrix. The deuterium lamp absorption
is then subtracted from the HCL signals to yield the absorption by analyte atoms. 5. Radiation from the source is modulated to distinguish it from emissions by the flame. 7. At high currents, more unexcited atoms are formed in the sputtering process. These atoms
attenuate the lamp...
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This document was uploaded on 03/06/2014 for the course CHEM 422 at CSU Northridge.
- Fall '08