PHENOLICS COMPOSITION, ANTIOXIDANT AND CORROSION INHIBITION EFFICIENCY, CAPACITY OF F raxinus Excelsior EXTRACTS

Amamra, Samra; Kaabi, Ilhem; Elkheir, Belhaddad Oum; Baghiani, Abderrahmane; Lekhmici, Arrar

doi:10.4067/s0717-97072021000305262

Cited by 1 publication

(1 citation statement)

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“…The bark has also been used as an antimicrobial, antiparasitic, and insect repellent. 9,17 The extract from F. excelsior leaves from showed various biological activities such as antioxidant [18][19][20] and anti-inflammatory, 21,22 while the extract from the seeds had diuretic and antihypertensive effects. 23 The aim of this work was to determine the content of total phenols, flavonoids, and phenolic acids, identification and quantification of selected phenolic acids, as well as the antioxidant activity of the F. ornus and F. excelsior extracts.…”

Section: Introductionmentioning

confidence: 99%

Kemijski sastav i antioksidativna aktivnost Fraxinus ornus L. i Fraxinus excelsior L.

Čopra-Janićijević,

Čulum,

Vidic

et al. 2024

Kem. ind. (Online)

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In this work, the total content of phenolics, flavonoids, and phenolic acids in the leaves and bark extracts of Fraxinus ornus L. and Fraxinus excelsior L. was determined. In addition, the identification and quantification of phenolic acids was performed using the HPLC-DAD technique. Samples were tested for antioxidant activity using the ABTS and DPPH methods. Eight extract samples were prepared by Soxhlet and ultrasound extraction using 70 % ethanol as solvent. The content of phenolic compounds ranged from 7.59 for F. ornus to 88.93 mg GAE/g for F. excelsior in the bark extracts obtained by Soxhlet extraction. The highest content of total flavonoids in F. ornus and F. excelsior was found in the leaves extracts obtained by ultrasound extraction, which was 5.68 and 1.74 mg GAE/g extract, respectively. The results also showed that the highest content of total phenolic acids was found in F. ornus (105.33 mg CAE/g) and F. excelsior (97.97 mg CAE/g) in the bark extract obtained by Soxhlet extraction. The highest content of gallic acid (112.96 ± 1.32 mg g–1 extracts) and chlorogenic acid (246.94 ± 0.82 mg g–1 extracts) was found in the F. ornus bark extract obtained by ultrasound extraction. As for antioxidant activity, the bark extract obtained by Soxhlet extraction of F. ornus showed the best antioxidant activity by ABTS method with IC50 value of 0.062 mg ml–1. The results of the DPPH method show that the leaves extract obtained by Soxhlet extraction had the best antioxidant activity for the F. ornus sample, with an IC50 value of 0.23 mg ml–1.

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