Investigations on nature of re-volatilization from atom trap surfaces in flame AAS

Korkmaz D., Kumser S., Ertas N., Mahmut M., Ataman O.

JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY, vol.17, no.12, pp.1610-1614, 2002 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 17 Issue: 12
  • Publication Date: 2002
  • Doi Number: 10.1039/b207788d
  • Journal Name: JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1610-1614
  • Middle East Technical University Affiliated: No

Abstract

Some experiments were designed and performed in order to elucidate the mechanism of re-volatilization in silica traps using flame AAS. A water-cooled U-shaped silica trap and a slotted silica tube trap were used, while organic solvent aspiration was employed for re-volatilization. Analytes were Bi, Au, Mn, Cd and Pb. The detailed experiments have shown that heating is not necessarily associated with re-volatilization: however, a direct contact between flame and active silica surface is required. The effect of the critical C/O value in the flame was also investigated and found to be important.