Advancing quantification methods for polyphenols in brown seaweeds-applying a selective qNMR method compared with the TPC assay.
phlorotannins
polyphenols
qNMR
quantification
seaweeds
Journal
Phytochemical analysis : PCA
ISSN: 1099-1565
Titre abrégé: Phytochem Anal
Pays: England
ID NLM: 9200492
Informations de publication
Date de publication:
Oct 2022
Oct 2022
Historique:
revised:
15
06
2022
received:
06
04
2022
accepted:
15
06
2022
pubmed:
8
7
2022
medline:
6
10
2022
entrez:
7
7
2022
Statut:
ppublish
Résumé
Brown seaweeds are a sustainable biomass with a potential for various industrial applications. Polyphenols are an important contributor to this potential. The aim was total quantification of polyphenols in brown seaweeds from different tidal zones, using a selective qNMR was performed with integration of selected peaks in the aromatic region (7-5.5 ppm). Deselection of non-polyphenolic Selective qNMR and the TPC assay showed similar results for the three sublittoral growing species from the Laminariaceae; lower amounts for Laminaria hyperborea and Laminaria digitata (qNMR: 0.4%-0.6%; TPC: 0.6%-0.8%, phloroglucinol equivalents (PGE), dry weight (DW)) and higher amounts for Saccharina latissima (qNMR: 1.2%; TPC: 1.5%, PGE, DW). For the eulittoral Fucaceae, Fucus vesiculosus (qNMR: 1.1%; TPC: 4.1%; PGE, DW) and Ascophyllum nodosum (qNMR: 0.9%; TPC: 2.0%; PGE, DW), the TPC results were found to be up to three times higher than the qNMR results. The The TPC assay provided similar polyphenolic amounts to the selective qNMR method for sublittoral species. For eulittoral growing species, the TPC method showed amounts up to three times higher than the qNMR method-most likely illustrating the lack of selectivity in the TPC assay.
Identifiants
pubmed: 35796295
doi: 10.1002/pca.3162
pmc: PMC9796469
doi:
Substances chimiques
Phenols
0
Phloroglucinol
DHD7FFG6YS
Polyphenols
0
Protons
0
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
1099-1110Subventions
Organisme : Bergen Research Foundation
ID : BFS-NMR-1
Organisme : Norges Forskningsråd
ID : 297507
Organisme : Sparebankstiftinga Sogn og Fjordane
ID : 509-42/16
Organisme : Research Council of Norway through the Norwegian NMR Platform, NNP
ID : 226244/F50
Informations de copyright
© 2022 The Authors. Phytochemical Analysis published by John Wiley & Sons Ltd.
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