Correct the absorbance of the spiked samples for dilution

Reference no: EM13184373

A 480 mg sample of cat food is digested with HNO3 and HClO4 and diluted to 25.0 mL in a volumetric flask. Three aliquots of 2.00 mL each are drawn, to which are added 0.1 mL, 0.2 mL and 0.3 mL spikes of 100.0 ppm Fe standard solution. The absorbance of an unspiked 2.00 mL aliquot is measured by AAS, and the absorbance of the spiked samples is measured as well. The data is presented in the Table below. Correct the absorbance of the spiked samples for dilution and plot the absorbance versus ppm Fe added. Extrapolate the graph to the point where absorbance is equal to zero to determine the amount of Fe in the cat food sample in ppm.

Reference no: EM13184373

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