Gas-phase re-distribution of analyte species in the integrated contact cuvette furnace atomization plasma emission spectrometry source

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DOIResolve DOI: http://doi.org/10.1039/JA9940900493
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TypeArticle
Journal titleJournal of Analytical Atomic Spectrometry
ISSN0267-9477
Volume9
Issue4
Pages493499; # of pages: 7
AbstractInteractions of molecular and atomic analyte species released from the primary site of deposition of the sample into a heated integrated contact furnace have been studied with furnace atomization plasma emission spectrometry. With a 30 W forward power plasma, double peaks are observed in atomic emission during atomization of Cd, Pb, Ag, Mn, Cu, Fe and Co, reflecting early release of analyte from both the wall (primary site of deposition) and, subsequently, the radiationally-heated centre electrode (secondary release). With increased r.f. power, there is a corresponding early shift in all emission transients, reflecting plasma induced heating of both the tube wall and the centre electrode. At higher r.f. power, the centre electrode temperature is sufficient to prevent condensation of molecular species of Cd and Pb with the result that the second (late) peak for these elements is eliminated. Similarly, when the primary site for analyte deposition is the centre electrode, and the r.f. power is 50 W or more, transfer of analyte occurs and secondary release from the tube wall is observed. A directed internal convective flow of plasma gas in the char stage has a significant effect on this process.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada
Peer reviewedNo
Identifier10391186
NRC number1266
NPARC number8899224
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Record identifiere90e6970-37c8-484a-9719-a64abffe2cdb
Record created2009-04-22
Record modified2016-05-09
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