ABSTRACT
In the emission methods of atomic spectroscopy, the substance must be excited after evaporation. The sample to be tested must be brought into the light source; in the case of emission spectrography, the powdered sample is evaporated, usually from a graphite electrode. In contrast to molecular spectroscopy, absorption methods of atomic spectroscopy use light sources which emit no continuous radiation. While the atomic absorption method measures the portion of absorbed radiation, the fluorescence technique determines the intensity of the emitted photons. Development of measuring techniques in emission spectrometry has taken place in recent years mainly in the field of the applied light sources. The qualitative analysis of airborne dust samples can advantageously be carried out by emission spectrometry. In qualitative analysis, the filter paper containing the sample is rolled without any powder loss and placed in the cavity of the graphite electrode where the sample is examined by the total evaporation method.
