Transcription of Basic Principles of Atomic Absorption and Atomic Emission ...
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Basic Principles of Atomic Absorption and Atomic Emission ...
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. The Functions of Flame and Plasma convert the constituents of liquid sample into the vapor state. 2. To decompose the constituents into atoms or simple molecules: M+ + e- (from flame) -> M + hn 3.
Zeeman effect correction method • These two methods are based on the fact that • Atomic bands are very narrow • Background bands are molecular in nature thus they are broad bands . 55 2. The continuous-source correction
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