The influence of atomization pressure on the behaviour of aluminium in electrothermal atomic-absorption spectrometry.
Pressurized atomization in argon purge gas considerably enhances the peak area in AAS determination of aluminium, owing to the decrease in the diffusion rate of atoms with increasing pressure. If lower heating rates are used, the diffusional loss mechanism becomes more important. Thus pressure then has an even more pronounced influence on signal strength. Atomization under pressure in argon purge gas is shown to be beneficial only for light elements. It can be expected that if instrumental matrix modification is made by using hydrogen as purge gas, increasing the atomization pressure may prove beneficial for all elements.
Fazakas
J
J
C.P. 2-104, R-78200 Bucharest 2, Romania.
Hoenig
M
M