Principles of Instrumental Analysis
7th Edition
ISBN: 9781305577213
Author: Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher: Cengage Learning
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Question
Chapter 9, Problem 9.2QAP
Interpretation Introduction
Interpretation:
An effect of absorption profile of three different elements is to be described as given in the figure. Like this absorption profile, other elements also need to be explained.
Concept introduction:
Absorption profile of elements is explained by the relationship of absorption and the height of flame. Effects of absorption profile of elements depend on the atomization efficiency of elements.
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Part II Data
Analytical Wavelength read from the spectra (nm):
Absorbance at the analytical wavelength for the 5 mL/5 mL mix
Absorbance at the analytical wavelength for the 4 mL/6 ml mix
628.5
0.875
0.704
3. Find the molar extinction coefficient from the 4 mL/6 mL mix.
Pathlength:
1.00 cm
Volume of Brilliant Blue:
4,00 ml
Volume of DI water.
6.00 ml
Absorbance at the analytical wavelength for the 4 mL/6 ml mix:
0,704
Concentration of Brilliant Blue in the 4 mL/6 ml mix (M):
Molar extinction coefficient from the 4 ml/6 mL mix (M cm')
4. Average molar extinction coefficient for Brilliant Blue (M cm)
What is the extinction coefficient for the following absorbances?
1. 3.000
2. 2.022
3.1.2025
4. 0.824
Would the units be in µmoles/mL)^-1 cm^-1
Chapter 9 Solutions
Principles of Instrumental Analysis
Ch. 9 - Prob. 9.1QAPCh. 9 - Prob. 9.2QAPCh. 9 - Why is an electrothermal atomizer more sensitive...Ch. 9 - Prob. 9.4QAPCh. 9 - Prob. 9.5QAPCh. 9 - Prob. 9.6QAPCh. 9 - Prob. 9.7QAPCh. 9 - Prob. 9.8QAPCh. 9 - Prob. 9.9QAPCh. 9 - Prob. 9.10QAP
Ch. 9 - Prob. 9.11QAPCh. 9 - Prob. 9.12QAPCh. 9 - Prob. 9.13QAPCh. 9 - Prob. 9.14QAPCh. 9 - Prob. 9.15QAPCh. 9 - Prob. 9.16QAPCh. 9 - Prob. 9.17QAPCh. 9 - In the concentration range of 1 to 100 g/mL P,...Ch. 9 - Prob. 9.19QAPCh. 9 - Prob. 9.20QAPCh. 9 - Prob. 9.21QAPCh. 9 - The chromium in an aqueous sample was determined...Ch. 9 - Prob. 9.23QAP
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