Počet záznamů: 1  

Determination of Trolox equivalent antioxidant capacity in berries using amperometric tyrosinase biosensor based on multi-walled carbon nanotubes

  1. 1.
    0525437 - ÚMCH 2021 RIV CH eng J - Článek v odborném periodiku
    Frangu, A. - Ashrafi, A. M. - Sýs, M. - Arbneshi, T. - Metelka, R. - Adam, V. - Vlček, Milan - Richtera, L.
    Determination of Trolox equivalent antioxidant capacity in berries using amperometric tyrosinase biosensor based on multi-walled carbon nanotubes.
    Applied Sciences-Basel. Roč. 10, č. 7 (2020), s. 1-13, č. článku 2497. E-ISSN 2076-3417
    Institucionální podpora: RVO:61389013
    Klíčová slova: amperometry * ascorbic acid * berries
    Obor OECD: Inorganic and nuclear chemistry
    Impakt faktor: 2.679, rok: 2020
    Způsob publikování: Open access
    https://www.mdpi.com/2076-3417/10/7/2497

    In this contribution, Trolox equivalent antioxidant capacity (TEAC) was determined in various berries using carbon paste tyrosinase biosensor with multi-walled carbon nanotubes (MWCNTs), coated with Nafion® layer. Electrochemical behaviour of the biosensor and influence of MWCNTs on carbon paste surface were studied with respect to the sensitive amperometric detection of total content of phenolic compounds in berries, expressed as concentration equivalent of Trolox. After optimization of key instrumental and electroanalytical parameters, the biosensor was used for determination of TEAC in blackberries, blueberries, cranberries, raspberries and strawberries by method of multiple standard additions. Electrochemical TEAC assays corresponded well with results obtained by spectrophotometric 1,1-diphenyl-2-picrylhydrazyl radical method, known as DPPH assay. Obtained values were compared with those listed in the National Nutrient Database for additional antioxidant capacity assays as well.
    Trvalý link: http://hdl.handle.net/11104/0309741

     
     
Počet záznamů: 1  

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