Atomisation in graphite furnace atomic absorption spectrometry: atmospheric pressure vis-à-vis vacuum vaporisation

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DOIResolve DOI: http://doi.org/10.1039/JA9860100359
AuthorSearch for: ; Search for:
TypeArticle
Journal titleJournal of Analytical Atomic Spectrometry
ISSN0267-9477
Volume1
Issue5
Pages359363; # of pages: 5
AbstractArrhenius plots were prepared from signals obtained for the atomisation of Pb, Bi and Au from a graphite surface at atmospheric pressure and in vacuum at 10–9 atm. Spatially integrated absorbance was recorded for atmospheric pressure studies and mass spectral intensity for vacuum runs. Comparison of activation energies (Ea) calculated from the leading edges of the signals showed no significant differences between atmospheric and vacuum vaporisation. The Ea values are thus not influenced by potential radial inhomogeneities in the vapour densities within the tube. For the elements and conditions used in this study, Arrhenius data support a vaporisation model that assumes the analyte to be present on the graphite surface in the form of microparticles as opposed to a monolayer.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada
Peer reviewedNo
Identifier10391186
NRC number1253
NPARC number8900657
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Record identifier07604987-0da1-4d74-9c5f-cf5fddf1c03a
Record created2009-04-22
Record modified2016-05-09
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