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.
2. Atomic absorption Signal = I absorbed = Absorbance = A = k l C •For the measurement to be reliable k must be constant; k should not change when a change in matrix or flame type takes place. •K depends upon same factors as those for the atomic emission spectroscopy
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