Atomic absorption spectrometry was used with the method of standard additions to

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Atomic absorption spectrometry was used with the method of standard additions to determine the concentration of cadmium in a sample of an industrial waste stream. For the addition, 10.0 mu L of a 1000.0 mug/mL Cd standard was added to 10.0 mL of solution. The following data were obtained: Absorbance of reagent blank = 0.021 Absorbance of sample = 0.307 Absorbance of sample plus addition = 0.756 What was the concentration of the cadmium in the waste stream sample? Later, the analyst learned that the blank was not truly a reagent blank, but water. The absorbance of the actual reagent blank, was 0.046. Calculate the cadmium concentration using the new information of the blank. Calculate the percent error caused by using water instead of the reagent blank.

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