Determination of the Total Phenolic Content in Wine Samples Using Potentiometric Method Based on Permanganate Ion as an Indicator

Molecules. 2019 Sep 9;24(18):3279. doi: 10.3390/molecules24183279.

Abstract

A rapid and accurate determination method for total phenolic content is of great importance for controlling the quality of wine samples. A promising potentiometric detection approach, based on permanganate ion fluxes across ion-selective electrode membranes, is fabricated for measuring the total phenolic content of wine. The results show that the presence of phenols, such as gallic acid, leads to a potential increase for the potentiometric sensor. Additionally, the present sensor exhibits a linear potential response with the concentration range from 0.05 to 3.0 g/L with a detection limit of 6.6 mg/L calculated using gallic acid. These sensors also exhibit a fast response time, an acceptable reproducibility and long-term stability. These results indicate that the proposed potentiometric sensor can be a promising and reliable tool for the rapid determination of total phenolic content in wine samples.

Keywords: indicator; potentiometric; total phenolic content; wine.

MeSH terms

  • Humans
  • Ions / chemistry
  • Manganese Compounds / chemistry*
  • Oxides / chemistry*
  • Phenols / chemistry
  • Phenols / isolation & purification*
  • Potentiometry*
  • Wine / analysis*

Substances

  • Ions
  • Manganese Compounds
  • Oxides
  • Phenols
  • permanganic acid