Analysis of polyphenolic compounds of different vinegar samples

  • Miguel Carrero Gálvez
  • Carmelo García Barroso
  • Juan Antonio Pérez-Bustamante
Original Paper


A method for the determination of low-molecular-mass polyphenolic compounds in vinegars has been optimized and applied to different samples. Ethyl acetate has been used for the extraction of the polyphenolic compounds in a continuous rotatory system, furnished with a special device that allows for the simultaneous extraction of twelve samples. The extracts obtained were submitted to HPLC separation using a C18 reversed-phase column and gradient elution. The identification of polyphenolic compounds was carried out using a photodiode detector. Important differences were found in the phenolic content of the different samples. Best extraction yields were obtained when using 80 ml ethyl acetate and 300 steps (2 h 5 min) at a velocity of 0.8 rpm. The reproducibility of the method may be considered quite good. The method has been successfully applied to the analysis of real samples of very different kinds of vinegar. There are very interesting differences between the low-molecular-mass phenolic fraction of the vinegar analysed. Some interesting low-molecular-mass phenolic compounds have been identified. Their concentration, as well as the concentrations of other so far non-identified substances, depend upon the type of sample. The individual investigation of these phenolic compounds may furnish hints enabling the origin and type of vinegar to be traced. The elaboration type used in connection with the starting wine can be ascertained and differentiated, together with the ageing system used, through inference from the analytical data obtained from different vinegars.


Ethyl Acetate Phenolic Compound Phenolic Content Extraction Yield Rotatory System 
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Analyse von polyphenolischen Verbindungen in verschiedenen Essig-Proben


Eine Methode für die Bestimmung von niedrig-molekularen polyphenolischen Verbindungen in Essig-Proben wurde optimiert und an verschiedenen Essig-Typen angewandt. Ethylacetat wurde als Extraktionsmittel benutzt in Verbindung mit einem kontinuierlichen Rotationsextraktor. Das ermöglicht die gleichzeitige Extraktion von zwölf Proben. Die entsprechenden Extrakte wurden einer HPLC-Trennung unterzogen, wobei eine C18-Umkehrphasen-Säule unter Gradientelution angewandt wurde. Die Identifizierung von polyphenolischen Verbindungen mittels eines Photodiodendetektors wurde durchgeführt. Wichtige Unterschiede in der Zusammensetzung der Phenole in den untersuchten Proben konnten nachgewiesen werden.


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Copyright information

© Springer-Verlag 1994

Authors and Affiliations

  • Miguel Carrero Gálvez
    • 1
  • Carmelo García Barroso
    • 1
  • Juan Antonio Pérez-Bustamante
    • 1
  1. 1.Analytical Chemistry DepartmentUniversity of CádizPuerto RealSpain

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