36 Questions
What are the advantages of atomic spectroscopy?
High sensitivity, high selectivity, high throughput, and good precision
Who developed atomic spectroscopy?
Alan Walsh
What are the three forms of atomic spectroscopy?
Absorption, emission, and fluorescence
How is atomic absorption performed?
A liquid sample is atomized in a flame and a detector measures the amount of light that passes through the flame
What is the most common fuel-oxidizer combination used in flame spectrometers?
Acetylene and air
What is atomic fluorescence?
Irradiating atoms in a flame with a laser to promote them to an excited electronic state and then measuring the fluorescence emitted when they return to the ground state
What is atomic emission?
Using a plasma to promote some atoms to excited electronic states, from which they emit photons to return to lower energy states
What is direct solid sampling?
Analyzing a solid without sample preparation
What are graphite furnaces?
Furnaces made of graphite
What is the Beer-Lambert Law?
A law that describes the relationship between the concentration of a solute and the amount of light absorbed by a solution
What are matrix modifiers?
Modifiers that reduce the loss of analyte during charring
What are the applications of atomic spectroscopy?
Widely used for elemental analysis in various fields, including environmental monitoring, clinical diagnosis, and material science
What are the advantages of atomic spectroscopy?
High sensitivity, high selectivity, high throughput, and good precision
Who developed atomic spectroscopy?
Alan Walsh
What are the three forms of atomic spectroscopy?
Absorption, emission, and fluorescence
How is atomic absorption performed?
A liquid sample is atomized in a flame and a detector measures the amount of light that passes through the flame
What is the most common fuel-oxidizer combination used in flame spectrometers?
Acetylene and air
What is atomic fluorescence?
Irradiating atoms in a flame with a laser to promote them to an excited electronic state and then measuring the fluorescence emitted when they return to the ground state
What is atomic emission?
Using a plasma to promote some atoms to excited electronic states, from which they emit photons to return to lower energy states
What is direct solid sampling?
Analyzing a solid without sample preparation
What are graphite furnaces?
Furnaces made of graphite
What is the Beer-Lambert Law?
A law that describes the relationship between the concentration of a solute and the amount of light absorbed by a solution
What are matrix modifiers?
Modifiers that reduce the loss of analyte during charring
What are the applications of atomic spectroscopy?
Widely used for elemental analysis in various fields, including environmental monitoring, clinical diagnosis, and material science
What is the main advantage of atomic spectroscopy?
High sensitivity
Who developed atomic spectroscopy?
Alan Walsh
What are the three forms of atomic spectroscopy?
Absorption, emission, fluorescence
What is atomic absorption?
A liquid sample is atomized in a flame, and a detector measures the amount of light that passes through the flame
How can the concentration of an absorbing species in a sample be measured?
Using the Beer-Lambert Law or a working curve after calibrating the instrument with standards of known concentration
What is atomic fluorescence?
Irradiating atoms in a flame with a laser to promote them to an excited electronic state and then measuring the fluorescence emitted when they return to the ground state
What is atomic emission?
Using a plasma to promote some atoms to excited electronic states, from which they emit photons to return to lower energy states
What is the most common fuel-oxidizer combination in flame spectrometers?
Acetylene and air
What is a graphite furnace?
A type of furnace that is more sensitive than flames and requires less sample
What is direct solid sampling?
Analyzing a solid without sample preparation
What are some fields in which atomic spectroscopy is widely used?
Environmental monitoring, clinical diagnosis, and material science
What is the purpose of matrix modifiers in direct solid sampling?
To reduce the loss of analyte during charring
Study Notes
Atomic Spectroscopy: Principles, Advantages, and Disadvantages
- Atomic spectroscopy was developed by Alan Walsh in the early 1950s.
- Advantages of atomic spectroscopy include high sensitivity, high selectivity, high throughput, and good precision.
- Atomic spectroscopy has three forms: absorption, emission, and fluorescence.
- In atomic absorption, a liquid sample is atomized in a flame, and a detector measures the amount of light that passes through the flame.
- The concentration of an absorbing species in a sample can be measured using the Beer-Lambert Law or a working curve after calibrating the instrument with standards of known concentration.
- Atomic fluorescence involves irradiating atoms in a flame with a laser to promote them to an excited electronic state and then measuring the fluorescence emitted when they return to the ground state.
- Atomic emission is widely used and involves using a plasma to promote some atoms to excited electronic states, from which they emit photons to return to lower energy states.
- In atomic spectroscopy, analyte is atomized in a flame, an electrically heated furnace, or a plasma.
- Most flame spectrometers use a premix burner, and the most common fuel-oxidizer combination is acetylene and air.
- Graphite furnaces are more sensitive than flames and require less sample, and they are heated in three or more steps to properly atomize the sample.
- Direct solid sampling involves analyzing a solid without sample preparation, and matrix modifiers can be added to reduce the loss of analyte during charring.
- Atomic spectroscopy is widely used for elemental analysis in various fields, including environmental monitoring, clinical diagnosis, and material science.
Test your knowledge on the principles, advantages, and disadvantages of atomic spectroscopy with this quiz! This powerful analytical technique has been widely used for elemental analysis in fields such as environmental monitoring and clinical diagnosis. Through questions on the different forms of atomic spectroscopy and the various methods of sample preparation, you'll be able to gauge your understanding of this fascinating area of science. Whether you're a student or a professional, this quiz is a great way to expand your knowledge on atomic spectroscopy.
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