Cw. Leblanc et Mw. Blades, SPATIAL AND TEMPORAL PROFILES OF INDIUM IN A FURNACE ATOMIZATION PLASMA EXCITATION SPECTROMETRY SOURCE, Applied spectroscopy, 51(11), 1997, pp. 1715-1721
Spatially resolved emission and absorption intensities from the indium
303.93-nm resonance line were measured in a furnace atomization plasm
a excitation spectrometry (FAPES) source. These measurements show that
the spatial structure observed in the analyte emission is due to two
effects, The first is the spatial distribution of analyte atoms in the
source. The absorption measurements show that this spatial distributi
on is fairly uniform. There is a slight gradient, with analyte concent
rations increasing from the cuvette wall to the center electrode. The
fine structure in the emission intensity profiles must therefore be ca
used by the dependence of the degree of analyte excitation on position
within the cuvette. This structure suggests that the FAPES source ope
rates as an atmospheric-pressure radio-frequency glow discharge. Negat
ive glows are seen adjacent to the graphite cuvette wall and center el
ectrode.