<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>To fill nutrient gaps, supplements are employed in the field of nutrition. The spice <italic>Xylopia aethiopica</italic> grows wild in many African countries and has been used as flavouring for soups. This study evaluates the polyphenols and antioxidant profile of different fractions of <italic>X. aethiopica</italic> methanol extract. Powdered sample of <italic>X. aethiopica</italic> (250 g) was suspended in methanol (1.5 litre) for 48 hours and the extract was concentrated at 45 °C using water bath to obtain methanol crude extract which was fractionated into <italic>n</italic>-hexane (n-Hex), chloroform (Chl), diethyl ether (DEE), <italic>n</italic>-butanol (n-Bu) and aqueous fractions using liquid- liquid partition separation technique. Antioxidant properties were investigated using standard methods and the polyphenols were estimated using high performance liquid chromatography with diodearray detector (HPLC-DAD). Results revealed that the DEE fraction had significantly (p &lt; 0.05) high total phenol content (TPC), proanthocyanidins, anthocyanins, 1,1-diphenyl-2-picrylhidrazyl (DPPH) radical scavenging, ferric reducing antioxidant power (FRAP) and total antioxidant capacity (TAC) as compared with other fractions. The highest luteolin and taxifolin content was detected in n-Hex fraction. Polyphenols found in DEE fraction in the established HPLC-DAD assay were <italic>p</italic>-anisic acid (0.07 ng/g), caffeic acid (0.56 ng/g), vanillic acid (0.91 ng/g), salicylic acid (1.64 ng/g), gallic acid (3.09 ng/mL), ferulic acid (3.64 ng/g), <italic>p</italic>-coumaric acid (5.15 ng/g), sinapinic acid (6.63 ng/g) and protocatechuic acid (24.89 ng/g). The different fractions of <italic>X. aethiopica</italic> displayed various polyphenols potential with probable antioxidant activity, which may be useful in neutralizing free radicals and the treatment of chronic inflammatory associated metabolic ailments, such as obesity and diabetes.</p>
</abstract>

To fill nutrient gaps, supplements are employed in the field of nutrition. The spice Xylopia aethiopica grows wild in many African countries and has been used as flavouring for soups. This study evaluates the polyphenols and antioxidant profile of different fractions of X. aethiopica methanol extract. Powdered sample of X. aethiopica (250 g) was suspended in methanol (1.5 litre) for 48 hours and the extract was concentrated at 45 °C using water bath to obtain methanol crude extract which was fractionated into n-hexane (n-Hex), chloroform (Chl), diethyl ether (DEE), n-butanol (n-Bu) and aqueous fractions using liquid- liquid partition separation technique. Antioxidant properties were investigated using standard methods and the polyphenols were estimated using high performance liquid chromatography with diodearray detector (HPLC-DAD). Results revealed that the DEE fraction had significantly (p < 0.05) high total phenol content (TPC), proanthocyanidins, anthocyanins, 1,1-diphenyl-2-picrylhidrazyl (DPPH) radical scavenging, ferric reducing antioxidant power (FRAP) and total antioxidant capacity (TAC) as compared with other fractions. The highest luteolin and taxifolin content was detected in n-Hex fraction. Polyphenols found in DEE fraction in the established HPLC-DAD assay were p-anisic acid (0.07 ng/g), caffeic acid (0.56 ng/g), vanillic acid (0.91 ng/g), salicylic acid (1.64 ng/g), gallic acid (3.09 ng/mL), ferulic acid (3.64 ng/g), p-coumaric acid (5.15 ng/g), sinapinic acid (6.63 ng/g) and protocatechuic acid (24.89 ng/g). The different fractions of X. aethiopica displayed various polyphenols potential with probable antioxidant activity, which may be useful in neutralizing free radicals and the treatment of chronic inflammatory associated metabolic ailments, such as obesity and diabetes.

<italic>Xylopia aethiopica</italic> HPLC-DAD polyphenol profiling and antioxidant status from South-South region of Nigeria

Delta State University of Science and Technology

Ovidius University Annals of Chemistry

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

 HPLC-DAD polyphenol profiling and antioxidant status from South-South region of Nigeria

To fill nutrient gaps, supplements are employed in the field of nutrition. The spice Xylopia aethiopica grows wild in many African countries and has been used...

Xylopia aethiopica HPLC-DAD polyphenol profiling and antioxidant status from South-South region of Nigeria

Publié en ligne: 17 nov. 2023

Pages: 104 - 111

Reçu: 19 nov. 2022

Accepté: 13 sept. 2023

DOI: https://doi.org/10.2478/auoc-2023-0014

Mots clés
HPLC-DAD, luteolin, polyphenols, taxifolin,

© 2023 Joel Okpoghono et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Xylopia aethiopica HPLC-DAD polyphenol profiling and antioxidant status from South-South region of Nigeria

Publié en ligne: 17 nov. 2023

Pages: 104 - 111

Reçu: 19 nov. 2022

Accepté: 13 sept. 2023

DOI: https://doi.org/10.2478/auoc-2023-0014

Mots clésHPLC-DAD, luteolin, polyphenols, taxifolin,

© 2023 Joel Okpoghono et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Mots clés
HPLC-DAD, luteolin, polyphenols, taxifolin,