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Updated: Dec 11, 2025

Quantitative 31P NMR Analysis of Lignins and Tannins
Published on: August 2, 2021
Partition Coefficients (logP) of Hydrolysable Tannins
Valtteri Virtanen1, Maarit Karonen1
1Natural Chemistry Research Group, Department of Chemistry, University of Turku, FI-20014 Turku, Finland.
Abstract:
The partition coefficients (logP) between n-octanol and water of 47 purified and characterized hydrolysable tannins were measured with the shake flask method utilizing UPLC and HPLC with UV detection. Results show that galloyl glucoses and gallotannins are clearly more hydrophobic than ellagitannins but the differences in hydrophobicity within ellagitannins are more varied than within galloyl glucoses or gallotannins. Most notable structural features that were found to influence the hydrophobicity of ellagitannins were the number of free galloyl groups, acyclic versus cyclic polyol, substitution of the anomeric position of glucose and 4C1 versus 1C4 conformation of the glucopyranose core.
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