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Pregled bibliografske jedinice broj: 448990

Characterisation of catechins in green and black teas using square-wave voltammetry and RP-HPLC-ECD

Novak, Ivana; Šeruga, Marijan; Komorsky-Lovrić, Šebojka
Characterisation of catechins in green and black teas using square-wave voltammetry and RP-HPLC-ECD // Food chemistry, 122 (2010), 4; 1283-1289 doi:10.1016/j.foodchem.2010.03.084 (međunarodna recenzija, članak, znanstveni)

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Naslov
Characterisation of catechins in green and black teas using square-wave voltammetry and RP-HPLC-ECD

Autori
Novak, Ivana ; Šeruga, Marijan ; Komorsky-Lovrić, Šebojka

Izvornik
Food chemistry (0308-8146) 122 (2010), 4; 1283-1289

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

Ključne riječi
tea ; catechins ; square-wave voltammetry ; reverse-phase high-performance liquid chromatography with electrochemical detection

Sažetak
Eight green and three black teas have been analysed using square-wave voltammetry at a glassy-carbon electrode, at pH 2 and square-wave frequency 100 Hz. The SWV response of teas consisted of two partially resolved anodic peaks: peak 1 at around 0.372 V, and peak 2 around 0.491 V. First anodic peak was due to oxidation of pyrogallol catechins, i.e. epigallocatechin gallate (EGCG) and epigallocatechin (EGC), and peak 2 can be associated with oxidation of ortho-hydroquinone and galloyl groups in catechins, gallic acid, theaflavins, and other catechol-type phenolics present in tea. Peak 1 has been chosen for quantification purposes, and concentrations of catechins were calculated from the calibration plot constructed for EGC used as external standard. Amounts of catechins in green teas obtained by SWV were in good agreement with those obtained using reverse-phase high-performance liquid chromatography with electrochemical detection (RP-HPLC-ECD). For black tea samples the detector response of peak 1 was diminished due to interferences of coexisting polyphenols, and SWV obtained results were something lower than those obtained by HPLC-ECD.

Izvorni jezik
Engleski

Znanstvena područja
Kemija, Biotehnologija, Prehrambena tehnologija



POVEZANOST RADA

Projekti:
098-0982904-2907 - Elektroanalitička istraživanja mikrokristala i tragova otopljenih supstanci (Lovrić, Milivoj, MZOS ) ( CroRIS)
113-0000000-0548 - Prehrana i životne navike u očuvanju zdravlja (Mandić, Milena, MZOS ) ( CroRIS)

Ustanove:
Institut "Ruđer Bošković", Zagreb,
Prehrambeno-tehnološki fakultet, Osijek

Profili:

Avatar Url Šebojka Komorsky-Lovrić (autor)

Avatar Url Ivana Novak Jovanović (autor)

Avatar Url Marijan Šeruga (autor)

Poveznice na cjeloviti tekst rada:

doi www.sciencedirect.com doi.org

Citiraj ovu publikaciju:

Novak, Ivana; Šeruga, Marijan; Komorsky-Lovrić, Šebojka
Characterisation of catechins in green and black teas using square-wave voltammetry and RP-HPLC-ECD // Food chemistry, 122 (2010), 4; 1283-1289 doi:10.1016/j.foodchem.2010.03.084 (međunarodna recenzija, članak, znanstveni)
Novak, I., Šeruga, M. & Komorsky-Lovrić, Š. (2010) Characterisation of catechins in green and black teas using square-wave voltammetry and RP-HPLC-ECD. Food chemistry, 122 (4), 1283-1289 doi:10.1016/j.foodchem.2010.03.084.
@article{article, author = {Novak, Ivana and \v{S}eruga, Marijan and Komorsky-Lovri\'{c}, \v{S}ebojka}, year = {2010}, pages = {1283-1289}, DOI = {10.1016/j.foodchem.2010.03.084}, keywords = {tea, catechins, square-wave voltammetry, reverse-phase high-performance liquid chromatography with electrochemical detection}, journal = {Food chemistry}, doi = {10.1016/j.foodchem.2010.03.084}, volume = {122}, number = {4}, issn = {0308-8146}, title = {Characterisation of catechins in green and black teas using square-wave voltammetry and RP-HPLC-ECD}, keyword = {tea, catechins, square-wave voltammetry, reverse-phase high-performance liquid chromatography with electrochemical detection} }
@article{article, author = {Novak, Ivana and \v{S}eruga, Marijan and Komorsky-Lovri\'{c}, \v{S}ebojka}, year = {2010}, pages = {1283-1289}, DOI = {10.1016/j.foodchem.2010.03.084}, keywords = {tea, catechins, square-wave voltammetry, reverse-phase high-performance liquid chromatography with electrochemical detection}, journal = {Food chemistry}, doi = {10.1016/j.foodchem.2010.03.084}, volume = {122}, number = {4}, issn = {0308-8146}, title = {Characterisation of catechins in green and black teas using square-wave voltammetry and RP-HPLC-ECD}, keyword = {tea, catechins, square-wave voltammetry, reverse-phase high-performance liquid chromatography with electrochemical detection} }

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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