Lab 8 Report

Lab 8 Report - Determination of the Iron content of Cereals...

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Determination of the Iron content of Cereals by AA Spectroscopy I. Introduction: The objective of this experiment was to determine the iron content of cereal. After de- termining the iron content, we compare it to the manufacture’s listed iron content to see if it matches. The way we did this was by using Atomic Absorption (AA) Spectroscopy. The AA Spectrometer used was model Avian SpectraAA 55B . This technique was used to look at the absorption of atoms within a flame. In flame, the limit of detection of Fe was 5 ng/mL 1 . A monochromator and detector were used in AA Spectroscopy. We used samples made by diluting the solutions then and placed them in the flame at a temperat- ure between 2400 K and 2700 K. We used the method of standard additions to avoid the uncertainties caused by the matrix (consisting of other soluble elements). Absorbance vs added Fe-standard concentration plots were made. With the x intercept of the graph, we can determine the Fe content. II. Experimental:
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This note was uploaded on 04/23/2008 for the course CH 109 taught by Professor Brunker during the Spring '07 term at BU.

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Lab 8 Report - Determination of the Iron content of Cereals...

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