Related Experiment Video
Updated: Jun 15, 2026
A Generalized Method for Determining Free Soluble Phenolic Acid Composition and Antioxidant Capacity of Cereals and Legumes
Published on: June 10, 2022
Flavonol quantification and stability of phenolics in fermented extracts from fresh Betula pendula leaves
Agnès Millet1, Florian Stintzing, Irmgard Merfort
1Institute for Pharmaceutical Sciences, Department of Pharmaceutical Biology and Biotechnology, Albert-Ludwig-University Freiburg, Stefan-Meier-Strasse 19, 79104 Freiburg, Germany.
Abstract:
An HPLC method, which allows reliable quantitation of flavonols and other phenolics in birch leaf extracts, was developed and validated. The method was applied to study the bioconversion of flavonols in fermented aqueous extracts. Almost 100% of the flavonols were converted during the 12 months observation period. The generated phenolics as well as consecutive conversion products were identified by HPLC-DAD, LC-MS and GC-MS techniques.
