A comparative study of the ethanol extract of the leaves of four species of Psidium (P. cattleianum, P. claraense, P. guajava and P. sartorianum) was carried out. The investigation included phytochemical screening, Folin-Ciocalteu method to determine total phenolic content and determination of antioxidant activity by assaying the free radical sequestering activity of 2,2-diphenyl-1-picryl-hydrazyl (DPPH). The phytochemical screening showed a similar composition in the four evaluated species. The phenolic content of the ethanolic extracts of the four species was high, especially in the extract of Psidium sartorianum (17.59 mgEAG / gES) but lower than that obtained for Psidium guajava (19.782 mgEAG / gES) considered a reference species. The ethanolic extracts of the four species of Psidium showed values of DPPH free radical scavenger activity higher than the synthetic antioxidant Butyl hydroxytoluene (BHT) (175.98 μg / mL), highlighting the Psidium sartorianum (17.82 μg / mL).
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Comparison of total phenols content and DPPH radical-scavenging activity of four Psidium species.
Published: 07 December 2018 by MDPI in MOL2NET'18, Conference on Molecular, Biomed., Comput. & Network Science and Engineering, 4th ed. congress MODEC-03: Workshop on Natural Products and Agro-Industrial Procesess in Amazon, UEA, Puyo, Ecuador, 2018
Keywords: Psidium, radical scavenger activity, phenolic content, phytochemical