Graphite furnace volatilization and flame atomization were combined for studying the volatilization characteristics of Ca + Al and Ca + Al + La systems. Based on the results of these model experiments the following mechanism of releasing effect is offered: the excess of lanthanum chloride additive promotes the evolution of calcium chloride vapour at a relatively low temperature and thus the formation of calcium aluminate (the thermostable compound of the analyte and the interferent) is prevented. This explanation is consistent with the finding that a releasing effect is not attained with lanthanum nitrate additive.
ASJC Scopus subject areas
- Analytical Chemistry
- Atomic and Molecular Physics, and Optics