Atomic Absorption Spectroscopy

Atomic Absorption Spectroscopy - Atomic Absorption...

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Atomic Absorption Spectroscopy
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Abstract: The purpose of this experiment was to detect and quantify the amount of chromium in a sample of fly ash. The absorbance and concentration (respectively) of the three standards of chromium concentration were first determined (1ppm: 0.020 ± 0.003, 0.002%, 3ppm: 0.054 ± 0.001, 0.007%, 5ppm: 0.071 ± 0.002, 0.011%). Our unknown and blank were then measured (Unknown: 0.052 ± 0.003, blank: 0.003 ± 0.001). We then were able to graph absorbance versus concentration of our standards, and from our linear regression line we the used the formula to determine our concentration of chromium in fly ash (0.00701%) Introduction: The principle studied in this experiment was to show that nearly all metals on the periodic can be analyzed via atomic absorption spectroscopy. Also, this experiment set out to teach us how to determine what standards are appropriate to use for our unknown based on experimental research and data (found in the Perkin Elmer Standard Conditions manual). A monochromator was used because many optical characteristics of a material are dependent on color. In this particular experiment, the absorbance of the unknown is what indicated our concentration, which was dependent on the
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absorbance measured from the standards. Procedure:
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This note was uploaded on 04/07/2008 for the course CHEM 300 taught by Professor Milligan during the Fall '07 term at SUNY Fredonia.

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Atomic Absorption Spectroscopy - Atomic Absorption...

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