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March 29, 2015

Homework Help: Chemistry

Posted by Mae on Monday, March 5, 2012 at 4:05am.

It is possible, although less accurate, to do a standard addition with only one sample. An unknown Fe sample was analyzed by AAS and gave an absorbance reading of 0.160. To the same sample we added 1.5ppm Fe and the new absorbance reading was 0.205. Calculate the ppm of the unknown Fe.

Could someone please explain to me on how to do this question step by step. Thanks.

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