Based on the picture i) Calculate the limit of detection (LOD) and limit of quantitation (LOQ) for As. ii) Determine the dynamic range of the method. iii) A sample of water yielded an absorbance of 0.36. What is the concentration of As in the water?
Based on the picture i) Calculate the limit of detection (LOD) and limit of quantitation (LOQ) for As. ii) Determine the dynamic range of the method. iii) 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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Based on the picture
i) Calculate the limit of detection (LOD) and limit of quantitation (LOQ) for As.
ii) Determine the dynamic range of the method.
iii) A sample of water yielded an absorbance of 0.36. What is the concentration of As in the water?
![A graphite furnace atomic absorption spectrophotometer (GFAAS) 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
12
Absorbance
0.15
0.27
0.46
0.55
0.71
0.85
0.9
y = 0.0693x + 0.015.-
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
4
6
8
10
12
14
[As], ppm
Absorbance](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fea7e15ad-f65c-43f6-910e-2a06dc641e62%2F7a4e4d9c-e0a7-449b-bf7f-854fd549e87b%2Fnnc8tnk_processed.png&w=3840&q=75)
Transcribed Image Text:A graphite furnace atomic absorption spectrophotometer (GFAAS) 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
12
Absorbance
0.15
0.27
0.46
0.55
0.71
0.85
0.9
y = 0.0693x + 0.015.-
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
4
6
8
10
12
14
[As], ppm
Absorbance
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