Atomic Spectroscopy (AAS, AES, AFS, Applications)
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Science
University
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15 questions
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1.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
What is the temperature range at which samples are vaporized in atomic spectroscopy?
1000 - 2000
8000 - 9000 K
6000 - 8000 K
500 - 5000 K
2.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
How is the atomic concentration determined in atomic spectroscopy?
by measuring adsorption, emission, or fluorescence at a specific wavelength
by measuring absorption, emission, or fluorescence at specific wavelength
by measuring emission & fluorescence at specific frequency
by measuring absorption, emission or sensitivity at specific frequency
3.
MULTIPLE SELECT QUESTION
20 sec • 1 pt
What are the units commonly used to express the concentration in atomic spectroscopy?
ppb
ppt
ppm
pph
4.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
What is the typical precision of atomic spectroscopy?
5 - 10%
4 - 5%
1 - 2%
10 - 15%
5.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
What is the purpose of Atomic Absorption Spectroscopy (AAS)?
quantitatively determine the concentration of chemical elements in a sample by measuring the absorption of radiation (light) by free atoms in the liquid phase
quantitatively determine the concentration of measurable elements in a sample by measuring the adsorption of radiation (light) by dormant atoms in gaseous state
quantitatively determine the mol number of elements in a sample by measuring the adsorption of radiation (light) by atoms on gaseous state
quantitatively determine the concentration of chemical elements in a sample by measuring the absorption of radiation (light) by free atoms in the gaseous state
6.
MULTIPLE SELECT QUESTION
20 sec • 1 pt
What are the advantages of using AAS compared to other methods?
Simple
High Operator Involvement
Greater precision
Low Operating Cost
7.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
A = k * C
What is A
Absorbance
Angstrom
Atom
Desired Element
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