Solve (c) and (d) A graphite furnace atomic absorption spectrophotometer (AAS) was used to determine thearsenic (As) concentrations in drinking water. A large set of blank samples yielded an averageblank signal of 0.015 and a blank standard deviation of 0.0050. The following data wereobtained for a calibration curve.[As] (ppm)2.04.06.08.010.0Absorbance0.150.270.460.550.71Using a spreadsheet on an Excel, create a graph of the data using symbols only for the datapoints. Plot the line on the same graph and include the graph to this question. Answer thefollowing questions.(a). What is the sensitivity of the method?(b). Calculate the LOD and LOQ for As.(c). What is the dynamic range of the method? Hint: it is NOT the entireconcentration range.(d). A sample of water yielded an absorbance of 0.36. What is the concentration ofAs in the water?

Atomic absorption spectroscopy is a quantitative spectroscopic method to determine the concentration…

Answered: (c). What is the dynamic range of the…

(c). What is the dynamic range of the method? Hint: it is NOT the entire concentration range. (d). A sample of water yielded an absorbance of 0.36. What is the concentration of As in the water?

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Question

Solve (c) and (d)

A graphite furnace atomic absorption spectrophotometer (AAS) was used to determine the
arsenic (As) concentrations in drinking water. A large set of blank samples yielded an average
blank signal of 0.015 and a blank standard deviation of 0.0050. The following data were
obtained for a calibration curve.
[As] (ppm)
2.0
4.0
6.0
8.0
10.0
Absorbance
0.15
0.27
0.46
0.55
0.71
Using a spreadsheet on an Excel, create a graph of the data using symbols only for the data
points. Plot the line on the same graph and include the graph to this question. Answer the
following questions.
(a). What is the sensitivity of the method?
(b). Calculate the LOD and LOQ for As.
(c). What is the dynamic range of the method? Hint: it is NOT the entire
concentration range.
(d). A sample of water yielded an absorbance of 0.36. What is the concentration of
As in the water?

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