Naslov
Preparation and characterization of chitosan hydrogel-based optical sensor for total antioxidant capacity determination

Autori
Živković, Pavo ; Petrić, Robert ; Sečenji, Aleksandar

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
27HSKIKI-Book of Abstracts / Marković, Dean ; Meštrović, Enes ; Namjesnik, Danijel ; Tomašić, Vesna - Zagreb, 2021, 215-215

Skup
27. hrvatski skup kemičara i kemijskih inženjera (27HSKIKI)

Mjesto i datum
Veli Lošinj, Hrvatska, 05.10.2021. - 08.10.2021

Vrsta sudjelovanja
Poster

Vrsta recenzije
Domaća recenzija

Ključne riječi
optical sensor, chitosan hydrogel, total antioxidant capacity

Sažetak
Total antioxidant capacity (TAC) measures the total antioxidants present in the sample, including their synergic and redox interaction between different molecules present in the sample. From the introduction of TAC as a concept until today, many different analytical methods have been developed and applied in different systems for its evaluation. However, the complexity of TAC as a concept and analyte results in inconsistent results, and because of that, there is no universal and straightforward method for TAC evaluation. Here we report the preparation of hydrogelbased sensor for TAC evaluation based on change of optical properties in interaction with antioxidants. Hydrogel sensor is prepared by crosslinking of chitosan with 2, 2'-bipyridine- 4, 4'- dicarboxylic acid. Addition of Fe(II) salts and 2, 4, 6-Tri(2-pyridyl)-1, 3, 5-triazine (TPTZ) as additional ligand results a blue-colored hydrogel- (2, 2'-bipyridine-Fe(II)-TPTZ) complex that loses color if oxidized. The color restores reversibly in the reaction with antioxidants. The hydrogelbased sensor is characterized by UV-VIS spectroscopy regarding its optical and sensory properties.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

POVEZANOST RADA