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Pregled bibliografske jedinice broj: 1089775

Evaluation of phenolic antioxidant capacity in beverages based on laccase immobilized on screen- printed carbon electrode modified with graphene nanoplatelets and gold nanoparticles

Zrinski, Ivana; Pungjunun, Kingkan; Martinez, Sanja; Zavašnik, Janez; Stanković, Dalibor; Kalcher, Kurt; Mehmeti, Eda
Evaluation of phenolic antioxidant capacity in beverages based on laccase immobilized on screen- printed carbon electrode modified with graphene nanoplatelets and gold nanoparticles // Microchemical Journal, 152 (2020), 104282, 8 doi:10.1016/j.microc.2019.104282 (međunarodna recenzija, članak, znanstveni)

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Naslov
Evaluation of phenolic antioxidant capacity in beverages based on laccase immobilized on screen- printed carbon electrode modified with graphene nanoplatelets and gold nanoparticles

Autori
Zrinski, Ivana ; Pungjunun, Kingkan ; Martinez, Sanja ; Zavašnik, Janez ; Stanković, Dalibor ; Kalcher, Kurt ; Mehmeti, Eda

Izvornik
Microchemical Journal (0026-265X) 152 (2020); 104282, 8

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Antioxidants ; Biosensors ; Graphene nanoparticles ; UV/Vis spectrophotometry

Sažetak
A simple and highly sensitive electrochemical biosensor based on laccase immobilized onto a gold nanoparticles/ graphene nanoplatelets-modified screen-printed carbon electrode (LACC/AuNP/GNPl/SPCE) was developed for the determination of hydroquinone (HQ) and other phenolic compounds. The biosensor shows excellent electrocatalytic activity towards oxidation of hydroquinone at a potential of -0.05 V (vs Ag/AgCl, 3 M KCl) in phosphate buffer as supporting electrolyte (0.1 M, pH 7.0) using hydrodynamic amperometry. Analytical characteristics uncover that the LACC/AuNP/GNPl/SPCE comprises a wide linear range for the dependence of the signal on HQ concentrations from 4 to 130 µM with a detection limit (3σ) of 1.5 µM. The repeatability (5 measurements, 100 µM hydroquinone) is ± 2% and the reproducibility (5 biosensors, 100 µM hydroquinone) is ± 3%. Interference studies of most common compounds with the determination of hydroquinone demonstrated negligible effects. Finally, the biosensor and the analytical method were applied to the determination of phenolic antioxidant capacity (AOC) in wine and blueberry syrup based on Trolox (6‑hydroxy‑2, 5, 7, 8-tetramethylchromane- 2-carboxylic acid) and hydroquinone equivalents. The results were evaluated by using their calibration curves which were satisfactory and agreed well with the results obtained by the reference method Trolox Equivalent Antioxidant Capacity assay (TEAC-Assay).

Izvorni jezik
Engleski

Znanstvena područja
Kemija, Kemijsko inženjerstvo



POVEZANOST RADA

Ustanove:
Fakultet kemijskog inženjerstva i tehnologije, Zagreb

Profili:

Avatar Url Sanja Martinez (autor)

Poveznice na cjeloviti tekst rada:

doi www.sciencedirect.com

Citiraj ovu publikaciju:

Zrinski, Ivana; Pungjunun, Kingkan; Martinez, Sanja; Zavašnik, Janez; Stanković, Dalibor; Kalcher, Kurt; Mehmeti, Eda
Evaluation of phenolic antioxidant capacity in beverages based on laccase immobilized on screen- printed carbon electrode modified with graphene nanoplatelets and gold nanoparticles // Microchemical Journal, 152 (2020), 104282, 8 doi:10.1016/j.microc.2019.104282 (međunarodna recenzija, članak, znanstveni)
Zrinski, I., Pungjunun, K., Martinez, S., Zavašnik, J., Stanković, D., Kalcher, K. & Mehmeti, E. (2020) Evaluation of phenolic antioxidant capacity in beverages based on laccase immobilized on screen- printed carbon electrode modified with graphene nanoplatelets and gold nanoparticles. Microchemical Journal, 152, 104282, 8 doi:10.1016/j.microc.2019.104282.
@article{article, author = {Zrinski, Ivana and Pungjunun, Kingkan and Martinez, Sanja and Zava\v{s}nik, Janez and Stankovi\'{c}, Dalibor and Kalcher, Kurt and Mehmeti, Eda}, year = {2020}, pages = {8}, DOI = {10.1016/j.microc.2019.104282}, chapter = {104282}, keywords = {Antioxidants, Biosensors, Graphene nanoparticles, UV/Vis spectrophotometry}, journal = {Microchemical Journal}, doi = {10.1016/j.microc.2019.104282}, volume = {152}, issn = {0026-265X}, title = {Evaluation of phenolic antioxidant capacity in beverages based on laccase immobilized on screen- printed carbon electrode modified with graphene nanoplatelets and gold nanoparticles}, keyword = {Antioxidants, Biosensors, Graphene nanoparticles, UV/Vis spectrophotometry}, chapternumber = {104282} }
@article{article, author = {Zrinski, Ivana and Pungjunun, Kingkan and Martinez, Sanja and Zava\v{s}nik, Janez and Stankovi\'{c}, Dalibor and Kalcher, Kurt and Mehmeti, Eda}, year = {2020}, pages = {8}, DOI = {10.1016/j.microc.2019.104282}, chapter = {104282}, keywords = {Antioxidants, Biosensors, Graphene nanoparticles, UV/Vis spectrophotometry}, journal = {Microchemical Journal}, doi = {10.1016/j.microc.2019.104282}, volume = {152}, issn = {0026-265X}, title = {Evaluation of phenolic antioxidant capacity in beverages based on laccase immobilized on screen- printed carbon electrode modified with graphene nanoplatelets and gold nanoparticles}, keyword = {Antioxidants, Biosensors, Graphene nanoparticles, UV/Vis spectrophotometry}, chapternumber = {104282} }

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus

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