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7 Cards in this Set
- Front
- Back
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Three forms of atomic spectroscopy are based on absorption, emission, and uorescence. How do they differ? |
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State the advantages and disadvantages of a furnace compared with a ame in atomic absorption spectroscopy. |
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State the advantages and disadvantages of the inductively coupled plasma compared with a ame in atomic spectroscopy. |
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20-6. Explain how the following background correction techniques work: (a) beam chopping; (b) deuterium lamp; (c) Zeeman. |
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20-7. Explain what is meant by spectral, chemical, ionization, and isobaric interference. |
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What is the memory effect? |
Interference from previous runs when using furnace. |
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MgO prevents premature evaporation of Al in a furnace by maintaining the aluminum as Al2O3. Another type of matrix modier prevents loss of signal from the atom X that readily forms the molecular carbide XC in a graphite furnace (a source of carbon). For example, adding yttrium to a sample containing barium increases the Ba signal by 30%. The bond dissociation energy of YC is greater than that of BaC. Explain what is happening to increase the Ba signal. |
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