The lectures are focused on applications of analytical chemistry. The detailed view on problems of analytics of real life samples is presented together with problem solving approach. The lessons follow 14 chosen topics. The seminars are divided into two sections. First involves evaluation of quality and/or reliability of analytical chemistry results. Methods such are Kraghten chart or up-to-down uncertainty evaluation are practised in detail. The second topic of seminars is structural analysis. The IR, 1H-NMR and EI-MS spectra are described and solved. Also combination of these spectra is practiced.