Abstract
Abstract The main advantage of inductively coupled plasma spectrometers with axially viewed plasma relative to the radially viewed plasma is the better detection power. The detection limits of the former are about 5-10 times lower than the latter. On the other hand, the axially viewed plasma has disadvantages. The most notable is the increased number of interference effects. In this paper, the study of the interference effects of aluminium on the atom- and ion-lines of alkaline earth metals are presented by examining different types of sample-introduction devices, such as a simple Meinhart-type concentric nebuliser, a V-groove nebuliser using a Sturman-Masters spray chamber, and an ultrasonic nebuliser
Highlights
Coupled plasma-atomic emission spectrometry (ICP-AES) is a widely used method for the elementary analysis of different types of material due to its advantageous features
We studied the effect of aluminium on the spectral lines of alkaline earth metals present in lowconcentrations in aqueous solutions, as well as the influence of different sample-introduction devices
In the experiments, we studied the intensity changes of several atom- and ion-lines of the alkaline earth metals as a function of aluminium concentration, analyte concentration and that of the device used for sampleintroduction
Summary
Coupled plasma-atomic emission spectrometry (ICP-AES) is a widely used method for the elementary analysis of different types of material due to its advantageous features. They may have different effects on the different types of sample-introduction devices, while they might affect the atom- and ionlines of a given element in different ways [4]. The difference regarding the different nebulisers lies partially in different processes resulting in small liquid droplets and the nebulisation efficiency These kinds of effects may be different when different nebulisers are applied, while they appear in the case of both radially and axially viewed plasma. The spectral interferences are stronger and more frequent when an axially viewed ICP source is used This is due to the light being emitted from the hot internal part of the plasma that has to travel a long way to reach the entrance slit of the optical system. We studied the effect of aluminium on the spectral lines of alkaline earth metals present in lowconcentrations in aqueous solutions, as well as the influence of different sample-introduction devices
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