Spatial imaging of the furnace atomization plasma emission spectrometry source

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DOIResolve DOI: http://doi.org/10.1039/JA9940901399
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TypeArticle
Journal titleJournal of Analytical Atomic Spectrometry
ISSN0267-9477
Volume9
Issue12
Pages13991409; # of pages: 11
AbstractThe spatial distribution of background species and analyte in a He FAPES source have been determined using a charge-coupled device (CCD) imaging system. Imaging of the He 667.82 nm support gas line reveals the presence of two distinct plasmas: an intense luminous zone located around the centre electrode and a diffuse plasma near the tube walls. In a graphite tube at room temperature, the plasma system exhibits a significant dependence on the d.c. bias of the centre electrode for a constant forward r.f. power of 50 W. Polyatomic background species exhibit similar overall distributions and response to changes in the centre electrode d.c. bias. The ingress of atmospheric nitrogen into the plasma can be indirectly detected at elevated tube wall temperatures. Images obtained for Ag atomized into 30 W and 50 W plasmas point out the role of the centre electrode as a primary condensation and secondary re-volatilization site. Condensation and re-evaporation is alleviated when Ag is atomized into a 70 W plasma as the result of plasma-induced heating of the centre electrode.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada
Peer reviewedNo
Identifier10391186
NRC number1269
NPARC number8898186
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Record identifierc3971f2e-18ed-4dee-9ccc-7746125f135a
Record created2009-04-22
Record modified2016-05-09
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