Atomization under pressure in graphite furnace atomic absorption spectrometry

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DOIResolve DOI: http://doi.org/10.1016/0584-8547(77)80009-8
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TypeArticle
Journal titleSpectrochimica Acta Part B: Atomic Spectroscopy
ISSN0584-8547
Volume32
Issue5-6
Pages257277; # of pages: 21
AbstractThe effects of an externally applied pressure on the analytical characteristics of absorbance signals derived from analyte atomization in a heated graphite atomizer have been examined. A specially constructed graphite furnace fitted with a pressurizable housing allowed studies to be carried out under pressures up to 13 atm of an inert gas. Increasing pressure reduced both the integrated and peak sensitivities, improved the linear range of calibration curves and shifted the characteristic absorption pulse temperatures to higher values. The major factor contributing to reduced sensitivity is the Lorentz shift in the absorption line profile due to applied pressure. In addition, the temperature—time characteristics of the atomizer play a role in determining the extent to which the applied pressure affects the absorption signals.
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LanguageEnglish
Peer reviewedYes
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This is a non-NRC publication

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NPARC number21276862
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Record identifierd673e395-533f-4fe4-8ae1-e4a32a5beabd
Record created2015-10-27
Record modified2016-05-09
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