Terahertz spectroscopy came to the attention of the broader scientific community in the 90s of the 20th century with the development of science and technology in particular, enabling to work in terahertz spectral region. Terahertz spectroscopy has a wide possibilities of applications beginning in classical spectroscopy of gun powders, plastics, explosives, liquids, through terahertz imaging of medicaments, tissues, materials or layers, to remote observation/identification of hidden objects mainly for security purposes. The aim of this paper is to introduce possible applications in analysis of pharmaceuticals with different amount of active ingredient content. According to the results, the classical terahertz spectroscopy is not as suitable as other spectroscopic methods targeted on analyzing content of pharmaceuticals showing persistent inconveniences of this spectroscopy. All measurements were done using the TPS Spectra 3000 instrument.
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