homework solutions5

Homework solutions5

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Unformatted text preview: em 422 Chapter 9 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.

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