Total phenolic content and antioxidative properties of commercial tinctures obtained from some Lamiaceae plants

Nat Prod Commun. 2012 Dec;7(12):1631-4.

Abstract

The antioxidant level of commercial tinctures from three Lamiaceae plants, Salvia officinalis, Mentha piperita, and Melissa officinalis, have been determined by the Folin-Ciocalteu method, the 2.2-diphenyl-2-picrylhydracyl hydrate (DPPH) radical scavenging technique and ABTS assay. Total phenolic content was expressed as GAE (gallic acid equivalent) and ranged from 0.24 to 3.99 mg/mL. Antioxidant activity in the ABTS assay, calculated as TEAC (Trolox equivalent antioxidant capacity), ranged from 23.5 to 35.6 micromol Trolox/mL, while in the DPPH method, the EC50 value ranged from 0.04 to 0.07 mL/assay. Radical scavenging activity was correlated with total phenolic content. Correlations between ABTS and F-C methods, DPPH and F-C methods and ABTS and DPPH methods were calculated. The obtained results can be useful as additional information about the antioxidant activity of galenical preparations.

MeSH terms

  • Antioxidants / chemistry*
  • Benzothiazoles / chemistry
  • Biphenyl Compounds
  • Chromatography, Thin Layer
  • Free Radical Scavengers / chemistry
  • Free Radical Scavengers / pharmacology
  • Gallic Acid / chemistry
  • Indicators and Reagents
  • Lamiaceae / chemistry*
  • Melissa / chemistry
  • Mentha piperita / chemistry
  • Phenols / analysis*
  • Picrates
  • Plant Extracts / chemistry
  • Plant Extracts / pharmacology
  • Salvia officinalis / chemistry
  • Sulfonic Acids / chemistry

Substances

  • Antioxidants
  • Benzothiazoles
  • Biphenyl Compounds
  • Free Radical Scavengers
  • Indicators and Reagents
  • Phenols
  • Picrates
  • Plant Extracts
  • Sulfonic Acids
  • 2,2'-azino-di-(3-ethylbenzothiazoline)-6-sulfonic acid
  • Gallic Acid
  • 1,1-diphenyl-2-picrylhydrazyl