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Article
Use of Supercritical Carbon Dioxide as a Carrier for Sample Introduction in Atomic Absorption Spectrometry
Analytica Chimica Acta (1992)
  • Julian Tyson
  • Stephen Bysouth
Abstract
The use of a supercritical carbon dioxide carrier to transport organic solutions of metal complexes to a heated
restrictor is demonstrated as a means of aerosol or vapour generation for sample introduction in flame atomic
absorption spectrometry. Calibrations obtained using conventional pneumatic nebulisation of continuously aspirated
solutions or using flow injection into a water carrier are compared with those obtained using the carbon dioxide
carrier. Injection of solutions of copper pyrrolidinedithiocarbamate in 4-methyl pentan-2-one into a carbon dioxide
carrier at 1000 p.s.i. was shown to be 1.2 times more sensitive than injection of the same solutions into a water carrier
with conventional nebulisation. The sensitivity of continuous nebulisation of the solutions, however, was not achieved.
Dissolution of solid copper acetyl acetonate in supercritical carbon dioxide is demonstrated and subsequent
vaporisation followed by atomisation in a heated quartz furnace is shown to occur.
Keywords
  • Atomic absorption spectrometry,
  • carbon dioxide,
  • carriers,
  • sample introduction,
  • supercritical carbon dioxide
Publication Date
1992
Citation Information
Julian Tyson and Stephen Bysouth. "Use of Supercritical Carbon Dioxide as a Carrier for Sample Introduction in Atomic Absorption Spectrometry" Analytica Chimica Acta Vol. 258 (1992) p. 55 - 60
Available at: http://works.bepress.com/julian_tyson/179/