Investigations on atomisation mechanisms of volatile hydride-forming elements in a heated quartz cell. Part 1. Gas-phase and surface effects; decomposition and atomisation of arsine
- 1 January 1983
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in The Analyst
- Vol. 108 (1283) , 213-224
- https://doi.org/10.1039/an9830800213
Abstract
The atomisation of gaseous hydrides in a heated quartz cell is not caused by a thermal decomposition but by collision with free hydrogen radicals. These radicals are formed in a reaction with oxygen at temperatures above 600 °C. In a “clean” environment, the concentration of radicals is well above the equilibrium concentration because their formation is a much faster process than their recombination. Several materials, however, can catalyse radical recombination and therefore have a depressing effect on the observed signal. In the absence of hydrogen, arsine is not atomised but thermally decomposed, probably with the formation of As2 and As4.Keywords
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