Release of arsenic, antimony and bismuth from the graphite support in the presence of tungsten and palladium modifiers

• Published in: Godishnik na Sofiiskiya Universitet \"Sv. Kliment Okhridski\", Khimicheski Fakultet (ISSN: 0584-0317), vol. 89, p. 47-54
• Publication date: 1999

Electrothermal at. absorption spectrometry is applied to study the release of the arsenic, antimony and bismuth atoms from pyrocoated graphite support. The influence of the chem. modifiers tungsten and palladium on the absorbance time profiles is exptl. evaluated. The Sturgeon's approach is used for estn. of the apparent activation energies of the atom release. The addn. of modifier leads to enhancement of the activation energies and changes the kind of the vaporizing species for analytes. The possible mechanisms of vaporization and atomization for As, Sb and Bi are discussed. [on SciFinder (R)]

Keywords: Atomic absorption spectrometry (electrothermal ; release of arsenic ; antimony and bismuth from graphite support in presence of tungsten and palladium modifiers for electrothermal at. absorption spectrometry) ; arsenic release graphite tungsten palladium modifier electrothermal atomic absorption ; antimony release graphite tungsten palladium modifier electrothermal atomic absorption ; bismuth release graphite tungsten palladium modifier electrothermal atomic absorption

Reference

• GR-SLV-ARTICLE-1999-002

Record created on 2007-11-27, modified on 2016-08-08