Principles of Instrumental Analysis, 6th Edition
6th Edition
ISBN: 9788131525579
Author: Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher: Cenage 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)
Compund AFK has a maximum absorbance of 650 nm. Its molar absorptivity at 650 is 8400 M−1cm−1 and the path length is 1 cm. Using a spectrophotometer, determine the concentration of Compound AFK it is absorbance at 650 nm is 0.700 ?
8.33x10-5 mol/L
1.20 x104 mol/L
1.08 x10-3 mol/L
7.74 x10-2 mol/L
Chapter 9 Solutions
Principles of Instrumental Analysis, 6th Edition
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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