Atomic Spectroscopy (AAS, AES, AFS, Applications)

What is the temperature range at which samples are vaporized in atomic spectroscopy?

• 1000 - 2000

• 8000 - 9000 K

• 6000 - 8000 K

• 500 - 5000 K

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

What are the units commonly used to express the concentration in atomic spectroscopy?

• ppb

• ppt

• ppm

• pph

What is the typical precision of atomic spectroscopy?

• 5 - 10%

• 4 - 5%

• 1 - 2%

• 10 - 15%

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

What are the advantages of using AAS compared to other methods?

• Simple

• High Operator Involvement

• Greater precision

• Low Operating Cost

A = k * C
What is A

• Absorbance

• Angstrom

• Atom

• Desired Element

What are some background correction methods used in AAS to avoid significant errors?

• Deuterium Lamp

• Board Chopping

• Zaiman Effect

• Smith-Hieftje

What is Plasma in AES based on Plasma Source?

• liquid, cold enough to contain ions and free electrons

• gas, hot enough to contain ions and free electrons

• gas, hot enough to contain ions and free photons

• liquid, hot enough to contain ions and free electrons

Which one shows illustration for Atomic Emission Spectroscopy?

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