The iron content of a municipal water supply was determined by an atomic absorption procedure. The absorbance of the water, after a ten-fold dilution was 0.500 at 248.3 nm. A standard solution prepared by dissolving 0.1500 g of pure iron wire in acid, diluting to 1.00 L and then making a 25-fold dilution, had an absorbance of 0.750. Calculate the ppm Fe in the water sample.

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Spectroanalytical Methods

Spectroanalytical methods measure the wavelength and intensity of radiations that are either emitted or absorbed by a molecular or atomic species. These methods are useful for evaluating the electronic or atomic arrangement of the molecules of a given analyte.