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 0.013 and a blank standard deviation of 0.0030. The following data were obtained for a calibration curve.

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 0.013 and a blank standard deviation of 0.0030. The following data were obtained for a calibration curve.

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

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 0.013 and a blank standard deviation of 0.0030. The
following data were obtained for a calibration curve.
[As] (ppm)
2.0
4.0
6.0
8.0
10.0
Absorbance
0.17
0.28
0.48
0.53
0.72
Calculate the LOD and LOQ for As. (DO NOT USE EXCEL)

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