Sample atomisation and oxidant release in graphite furnace atomic absorption spectrometry

Download
  1. Get@NRC: Sample atomisation and oxidant release in graphite furnace atomic absorption spectrometry (Opens in a new window)
DOIResolve DOI: http://doi.org/10.1039/JA9880300027
AuthorSearch for: ; Search for:
TypeArticle
Journal titleJournal of Analytical Atomic Spectrometry
ISSN0267-9477
Volume3
Issue1
Pages2734; # of pages: 8
AbstractTime-resolved measurements of the release of CO and oxidants during the thermal decomposition of samples in a graphite furnace have been made spectroscopically by monitoring the attenuation of CO(0,0) and CO(1,2) bands at 154.3 and 163.1 nm, respectively, emitted from a hollow-cathode discharge supplied with 10–3 atm CO. Low-temperature carbon reduction of analyte oxides, concurrent carbon reduction-vaporisation and thermal decomposition-vaporisation reactions could be delineated through isolation of the CO and oxidant source functions. A major source of free oxygen in the furnace arises from analyte oxide decomposition. The capacity of glassy carbon tubes to accommodate low-temperature release of excess oxidants is inferior to that of electrographite or pyrolytic graphite coated tubes. Chemisorption of O2 on to the tube surface influences the low temperature reduction capacity of the graphite tube and may play a role in the thermal shifting of absorption pulses and the “first shot back” phenomenon.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada
Peer reviewedNo
Identifier10391186
NRC number1255
NPARC number8899131
Export citationExport as RIS
Report a correctionReport a correction
Record identifier88e495b3-2bab-4189-8560-b8dfe6032655
Record created2009-04-22
Record modified2016-05-09
Bookmark and share
  • Share this page with Facebook (Opens in a new window)
  • Share this page with Twitter (Opens in a new window)
  • Share this page with Google+ (Opens in a new window)
  • Share this page with Delicious (Opens in a new window)