Quantitative analysis of phenolics in Trifolium pratense L. flowers and evaluation of antioxidant activity by sensory

Year 2024, Volume: 13 Issue: 2, 165 - 174, 31.08.2024

Ramazan Erenler , İbrahim Hosaflıoğlu , İlyas Yıldız , Mehmet Nuri Atalar , Süleyman Muhammed Çelik , Mehmet Hakkı Alma

https://doi.org/10.54187/jnrs.1529229

Abstract

Trifolium pratense L. flowers (TPF) were collected and dried in shade in this study. After extraction in methanol, a diluted solution was applied to the liquid chromatography electrospray ionization tandem mass spectrometry (LC-ESI-MS/MS) device to determine the bioactive compounds quantitatively. Isoquercitrin (38.64 mg/g extract), coumarin (13.66 mg/g extract), and catechin (12.52 mg/g extract) were verified as major products. Antioxidant activity of TPF was performed using a potentiometric PVC membrane sensor to evaluate 2,2-Diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity and total phenolic content of TPF. TPF inhibited the DPPH radical as 31.4 ± 0.02% at the 500-ppm concentration. However, the DPPH activity of gallic acid was determined as 81.43 ± 0.07% and 92.44 ± 0.1% at the TPF concentrations of 12.5 ppm and 25 ppm, respectively. In addition, the total phenolic content was calculated to be 82.4 ± 0.15 mg gallic acid eq/g extract. It was observed that TPF has the potential to be an antioxidant and a valuable source of isoquercitrin, coumarin, and catechin.

Keywords

Trifolium pratense, Natural compounds, Quantification, Sensory, Antioxidant activity

Ethical Statement

No approval from the Board of Ethics is required.

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