0579979 - ÚFCH JH 2024 PK eng C - Konferenční příspěvek (zahraniční konf.)
Navrátil, Tomáš - Skopalová, J. - Jerga, R. - Rajcová, A. - Müllerová, V. - Barták, P. - Cankař, P.
New approaches to the voltammetric determination of amphiphilic active substances.
2nd International Conference on Biological Research and Applied Science (IBRAS 22). Conference Program. Karachi: Jinnah University for Women, 2022, s. 72-74.
[International Conference on Biological Research and Applied Science (IBRAS 22) /2./. Karachi (PK), 11.01.2022-13.01.2022]
Grant CEP: GA ČR(CZ) GA20-07350S
Institucionální podpora: RVO:61388955
Klíčová slova: voltammetry * amphiphilic * electrochemistry
Obor OECD: Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)
https://www.juw.edu.pk/conference/ibras-2022/chemistry/1-AbstractT.Navratil.pdf

This contribution deals with new approaches to the voltammetric determination of amphiphilic electrochemically active substances. A new sensor that can be used to determine this group of frequently investigated compounds in various matrices was developed within the scope of our research. It is based on a glassy carbon electrode on the surface of which an asolectin (phospholipid) multilayer is formed. In the first step, the analyte is accumulated into this surface layer and then determined using differential pulse or direct current voltammetry.
Capsaicinoids can be considered as a model group of amphiphilic compounds and methods for their determination using the above-mentioned sensor were developed and tested by our research group. The results achieved using the phospholipid modified and bare electrode were compared with those obtained by the direct voltammetric method and HPLC/UV. The results were used to objectively evaluate the pungency of chili peppers. Additionally, a mass spectrometer hyphenated with an electrochemical cell was used to elucidate the electrochemical reactions of capsaicinoids and identify their main oxidation products.
Trvalý link: https://hdl.handle.net/11104/0348769