Purpose
Quality control and structure elucidation of mineral oil additives
Brief description of the method
The Fourier Transform Infra-Red (FT-IR) spectrometer is composed basically of the following parts: infrared source, Michelson interferometer, sample compartment and detector. The infrared radiation passes first through the interferometer, then through the sample. During the passage, characteristic signals are measured and stored digitally in the computer. The desired IR spectrum is obtained by a conversion (Fourier transformation) of these data.
Among the advantages offered by the FT-IR technique are shorter measurement times and a better signal/noise ratio.