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 9.13QAP
Interpretation Introduction
(a)
Interpretation:
The reason for decrease in atomic absorption signal for iron in presence of large concentration of sulphate ion in hydrogen-oxygen flame needs to be explained.
Concept introduction:
In a defined space, the amount of a substance gives its concentration. A substance’s capacity to absorb specific
Interpretation Introduction
(b)
Interpretation:
The ways of overcoming interference of sulphate in iron determination needs to be explained.
Concept introduction:
In a defined space, the amount of a substance gives its concentration. A substance’s capacity to absorb specific wavelength light gives its absorbance.
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In a hydrogen-oxygen flame, the atomic absorption signal for iron was found to
decrease in the presence of high concentrations of sulfate. Suggest an explanation for
this observation and propose one possible method for overcoming the potential
interference of sulfate in the quantitative determination of iron.
(a) Draw a block diagram of an atomic absorption spectrometer (AAS). Briefly describe the function of each components.
(b) What is the process of atomization in atomic absorption spectrometer? Describe the steps of the process in the correct sequence.
(c) State TWO interferences that are encountered in atomic absorption spectrometer. Suggest ONE solution to overcome the problem.
(d.) What is the main difference, in terms of instrumentation, between atomic absorption spectrometer and atomic emission spectroscopy?
Express a wavelength of 442 nm as (a) a frequency. (b) a wavenumber.
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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