Abstract

An electrothermal atomizer is employed to vaporize solid samples of pigments at temperatures ranging from 150°C to 1000°C. The evolution of vapors is followed by Fourier transform infrared spectrometry (FT-IR). The atomizer acts at the same time as vapor supplier and vapor holder. This coupling allows the investigation <i>in situ</i> of vaporization or pyrolysis phenomena avoiding the use of heated transfer pipes. The pigments examined in this study show various vapor-phase behaviors. Some pigments vaporize without appreciable decomposition at temperatures from 400°C to 950°C, while other pigments investigated decompose during the heating and originate pyrolysis products whose evolution is monitored continuously by the FT-IR spectrometer.

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