3524265952 - Atomic Spectroscopy Atomic Spectroscopy...

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tomic Spectroscopy Atomic Spectroscopy Lecture # 18 Dec. 16 th 2008 ec 6 , 008
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There are three basic components for every AA spectrophotometer 1- Light source 3. Light measurement 2. Sample cell
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1- Light source It is designed to emit the atomic spectrum of a g particular element. Specific lamps are selected according to the element to be determined. The hollow cathode lamp (HCL) or electrodeless mps (EDL) are widely used lamps (EDL) are widely used.
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ample cell 2. Sample cell - Where an atomic sample vapor is generated in the light beam from the source. This is usually done by introducing the sample to a burner system (Flame AAS) into a burner system (Flame AAS) or electrically heated furnace or platform, aligned in the optical path of the spectrophotometer.
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3. Specific light measurement - Includes several components: a) a monochromator to disperse several wavelength of lights that are emitted from the light source to isolate a particular line of interest, b) a detector to produce an electrical current that dependent on the light intensity This electrical is dependent on the light intensity. This electrical current is amplified and processed by the strument electronics to produce a signal which instrument electronics to produce a signal, which is a measure of the light attenuation occurring in the sample cell and, ) signal processor generate an instrument c) a signal processor to generate an instrument readout in concentration units.
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2. Sample cell
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This note was uploaded on 03/24/2011 for the course CHEM 323 taught by Professor Basimali during the Fall '09 term at King Fahd University of Petroleum & Minerals.

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3524265952 - Atomic Spectroscopy Atomic Spectroscopy...

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