Transcription of Basic Principles of Atomic Absorption and Atomic Emission ...
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1 Basic Principles of Atomic Absorption and Atomic Emission Spectroscopy 2 Source Wavelength Selector Sample Detector Signal Processor Readout P flame Atomic Emission Spectrometer 3 flame Atomic Emission Spectrometer 4 Emission Techniques Type Method of Atomization Radiation Source Arc sample heated in an sample electric arc (4000-5000oC) Spark sample excited in a sample high voltage spark flame sample solution sample aspirated into a flame (1700 3200 oC) Argon sample heated in an sample plasma argon plasma (4000-6000oC) 5 flame and Plasma Emission Spectroscopy are based upon those particles that are electronically excited in the medium.
44 • Flame Emission -> it measures the radiation emitted by the excited atoms that is related to concentration. • Atomic Absorption -> it measures the radiation absorbed by the unexcited atoms that are determined. •Atomic absorption depends only upon the number of unexcited atoms, the absorption intensity is not directly affected by the
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