Oxygen in the high-temperature graphite furnace

Document Type

Article

Publication Date

1984

Publication Title

Spectrochimica Acta Part B: Atomic Spectroscopy

Volume

39

Issue

3

First Page

213

Last Page

224

Abstract

Photometric measurements of the partial pressure of oxygen in the graphite furnace have been made utilizing a sensitive and selective chemiluminescent reaction with phosphorus vapor. Oxygen is present many orders of magnitude in excess of equilibrium pressures expected from a consideration of the reaction: 2C + O2 → 2CO. Reactivity of the graphite substrate is the prime mediator in controlling the partial pressure of oxygen. An equally efficient scavenging of oxygen in a tantalum tube furnace was also noted. The implications of these observations for the interpretation of atomization mechanisms are discussed. © 1984.

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