Abstract：
:Brown algae are rich in polyphenolic compounds, phlorotannins, which have been found to possess high in vitro antioxidant capacity, especially DPPH radical scavenging activity, due to the high number of hydroxyl groups. Whereas, the overall antioxidant capacity of brown algae extracts has been widely studied, the antioxidant capacity of individual phlorotannins has been rarely explored. The aim of this study was to determine the structure dependant antioxidant capacity of phlorotannins from Icelandic brown algae, Fucus vesiculosus. The antioxidant capacity of individual phlorotannins was determined by an on-line method using liquid chromatography and an electrochemical detector followed by quadrupole Time of Flight mass spectrometry (UHPLC-DAD-ECD-QTOFMS). Tentative structural elucidation of 13 phlorotannin isomers from EAF was obtained by LC-DAD-QTOFMS, ranging from 374 to 870Da. On-line determination of antioxidant capacity of the individual phlorotannins generally showed that low molecular phlorotannins exhibited higher antioxidant capacity and that the capacity decreased with polymerisation.
journal_name
Food Chemjournal_title
Food chemistryauthors
Hermund DB,Plaza M,Turner C,Jónsdóttir R,Kristinsson HG,Jacobsen C,Nielsen KFdoi
10.1016/j.foodchem.2017.08.032subject
Has Abstractpub_date
2018-02-01 00:00:00pages
904-909eissn
0308-8146issn
1873-7072pii
S0308-8146(17)31359-6journal_volume
240pub_type
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