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When is atomic absorption more sensitive than atomic emission in atomic absorption spectrometers?
Wiki User
∙ 7y ago
Atomic absorption is more sensitive to atomic emission when the excitation potential is greater than 3.5eV.
Wiki User
∙ 7y ago
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What kind of metals is atomic emission spectrometry especially sensitive for?
It is especially sensitive for alkali metals.
Is spectral interference more common in atomic emission spectroscopy or atomic absorption spectroscopy?
Spectral interference is more common in atomic emission spectroscopy due to overlapping spectral lines.
Why is source modulation used in atomic absorption spectroscopy?
Source modulation is employed to distinguish between atomic absorption (an ac signal) and flame emission (a dc signal).
How do you find copper in brass using the spectrophotometer absorptions?
Digest (dissolve) a small portion of the brass in nitric acid. Then test the sample for copper content using an atomic emission or atomic absorption spectrometer.
What is analytical instrumentation?
Analytical instrumentation: a large class of instruments used to analyze materials and to establish the composition. Some examples: spectrophotometers, mass spectrometers, gas chromatographs, potentiometric titrators, ion analyzers, polarographs, coulometers, x-ray spectro-meters, Karl Fischer titrators, atomic absorption spectrometers, fluorimeters and many, many others.
What are the strenghts of atomic absorption spectrometry compared to atomic emission spectrometry?
Atomic absorption spectrometry is more sensitive than atomic emission spectrometry.
What kind of metals is atomic emission spectrometry especially sensitive for?
It is especially sensitive for alkali metals.
Is spectral interference more common in atomic emission spectroscopy or atomic absorption spectroscopy?
Spectral interference is more common in atomic emission spectroscopy due to overlapping spectral lines.
Why is source modulation used in atomic absorption spectroscopy?
Source modulation is employed to distinguish between atomic absorption (an ac signal) and flame emission (a dc signal).
What are the advantages of ICP-MS compare to atomic emission spectrometry and atomic absorption spectrometry?
ICP-MS allows multi-element analysis. It has a longer linear working range so fewer standards for calibration is needed as they can be spaced further apart. ICP-MS also has a higher sensitivity compared to atomic emission spectrometry or atomic absorption spectrometry.
Why is atomic absorption not used for qualitative analysis?
For one thing, atomic absorption equipment is basically a fancier version of flame emission equipment (I'm unaware of any instrument capable of doing AA that can't also do FE), and flame emission doesn't require you to change tubes every time you want to check for another element.
Does atomic emission come from the sun?
there is no atomic emission from the sun.
What analytical instruments can be used to identify the metal in a salt such as calcium carbonate?
Examples: emission spectrometry, flame photometry, atomic absorption, etc.
Advantages and disadvantages of atomic emission spectrometry?
advantages of atomic emission
Why is atomic emission more sensitive to flame instability than atomic absorption fluorescence?
Answer- Flames in atomic emission are more sensitive to flame instability because optimum excitation conditions vary widely from element to element. High temperatures are needed for excitation of some elements and low temperatures for others. The region of flame that gives rise to optimum line intensities varies from element to element. Flame is rarely use in atomic emission because atomization is more complete when using a plasma due to the production of high temperatures. Also the plasma helps reduce the ionization interference effects. In flame absorption, after the sample is nebulized by a flow of gaseous oxidant, mixed with a gaseous fuel and carried into the flame it is then atomized. Then some of the atoms in the gas ionize to form cations and electrons. In flame emission the sample is introduce with argon, carries the sample into the flame. The flame is suppose to atomize the sample, while the flow of gas takes the ions and electrons to be detected.
How do you find copper in brass using the spectrophotometer absorptions?
Digest (dissolve) a small portion of the brass in nitric acid. Then test the sample for copper content using an atomic emission or atomic absorption spectrometer.
What is analytical instrumentation?
Analytical instrumentation: a large class of instruments used to analyze materials and to establish the composition. Some examples: spectrophotometers, mass spectrometers, gas chromatographs, potentiometric titrators, ion analyzers, polarographs, coulometers, x-ray spectro-meters, Karl Fischer titrators, atomic absorption spectrometers, fluorimeters and many, many others.
