Thesis on the topic Antioxidant in herbal teas is divided into two parts. The first part theortical is concerned with the description and division of antioxidants. There are mentioned some synthetic antioxidants, some major intracellular antioxidant and natural antioxidant, which are represented by polyphenolic compounds as the main components of herbal teas. Furthmore, there is described the determination of biologically active compounds by extraction techniques to chromatographic methods. In the theoretical part are also described individual samples of herbs used for analysis. The second part is concerned with the practical determination of polyphenolic acids in selected samples of herbal teas. Two extraction techniques were chosen for separation of polyphenolics acids. The first was Soxhlet extraction accelerated and the second was exctraction shaker. For the determination of polyphenolic acids was used high performance liquid chromatography (HPLC) coupled with a diode array detector (DAD) and with mass detector type triple quadrupole. The measured results show that in most samples of herbs were the most represented chlorogenic acid and caffeic acid.
| Identifer | oai:union.ndltd.org:nusl.cz/oai:invenio.nusl.cz:250219 |
| Date | January 2015 |
| Creators | Fadrhoncová, Pavla |
| Source Sets | Czech ETDs |
| Language | Czech |
| Detected Language | English |
| Type | info:eu-repo/semantics/masterThesis |
| Rights | info:eu-repo/semantics/restrictedAccess |
Page generated in 0.0116 seconds