The Nicolet iN10 Infrared Microscope spectrometer with the ATR addition (Thermo Scientific) enables the identification of individual chemical substances, compound mixtures, or the identification of likely contaminants. The precise Nicolet iN10 system enables the detection of materials on the level of several microns. The ATR addition enables obtaining very quick and accurate results without the need to prepare the sample. The equipment is used to identify unknown substances, analyse the composition of compound mixtures, and test the quality of materials in terms of identifying potential contaminants as well as to assess the qualitative changes in materials in time.