Comprehensive polyphenol profiling of a strawberry extract (Fragaria × ananassa) by ultra-high-performance liquid chromatography coupled with high-resolution mass spectrometry

Research output: Contribution to journalJournal articleResearchpeer-review

  • La Barbera, Giorgia
  • Anna Laura Capriotti
  • Chiara Cavaliere
  • Susy Piovesana
  • Roberto Samperi
  • Riccardo Zenezini Chiozzi
  • Aldo Laganà

The aim of metabolic untargeted profiling is to detect and identify unknown compounds in a biological matrix to achieve the most comprehensive metabolic coverage. In phytochemical mixtures, however, the complexity of the sample could present significant difficulties in compound identification. In this case, the optimization of both the chromatographic and the mass-spectrometric conditions is supposed to be crucial for the detection and identification of the largest number of compounds. In this work, a systematic investigation of different chromatographic and mass-spectrometric conditions is presented to achieve a comprehensive untargeted profiling of a strawberry extract (Fragaria × ananassa). To fulfill this aim, an ultra-high-pressure liquid chromatography system coupled via an electrospray source to a hybrid quadrupole–Orbitrap mass spectrometer was used. Spectra were acquired in data-dependent mode, and several parameters were investigated to acquire the largest possible number of both mass spectrometry (MS) features and MS2 mass spectra for unique metabolites. The main classes of polyphenols studied were flavonoids, phenolic acids, dihydrochalcones, ellagitannins, and proanthocyanidins. Method optimization allowed to us identify and tentatively identify 18 and 113 compounds, respectively, among which 74 have never been reported before in strawberries and, to the best of our knowledge, 22 of them have never been reported before. The results show the importance of an extended investigation of the chromatographic and mass-spectrometric method before a complete untargeted profiling of complex phytochemical mixtures.

Original languageEnglish
JournalAnalytical and Bioanalytical Chemistry
Volume409
Issue number8
Pages (from-to)2127-2142
Number of pages16
ISSN1618-2642
DOIs
Publication statusPublished - 1 Mar 2017

    Research areas

  • High-resolution mass spectrometry, Liquid chromatography, Polyphenols, Strawberry, Untargeted profiling

ID: 231310329