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Atomic absorption spectroscopy was used to measure zinc in an unknown urine sample The analysis was performed by mixing aliquots of sample solution with aliquots of zinc standard solution according

Atomic absorption spectroscopy was used to measure zinc in an unknown urine sample. The analysis was performed by mixing aliquots of sample solution with aliquots of zinc standard solution according to the table(s) below. The zinc standard solution used in this analysis contained 1000.0 μg/mL of zinc. Two different students performed this analysis using different experimental designs. Calculate the concentration of zinc in the unknown urine sample obtained by each of the two students. Which student obtained a more accurate concentration of zinc in urine and explain your reasoning?Student 1 experiment and resultsVolume of unknown (mL)Volume of standard added (mL)Total volume (mL)Absorbance10.000.00100.00.16310.001.00100.00.24010.002.00100.00.31910.003.00100.00.40210.004.00100.00.478Student 2 experiment and resultsVolume of unknown (mL)Volume of standard added (mL)Total volume (mL)Absorbance10.000.00100.00.15010.000.00100.00.15010.000.00100.00.15110.003.00100.00.423

 

Jun 22 2020 View more View Less

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