ANTIOXIDANT ACTIVITY OF HONEY SAMPLES FROM THE SOUTHERN RAINFOREST AND NORTHERN SAVANNAH ECOSYSTEMS IN NIGERIAAbstract
Selected physicochemical parameters, total phenolics, flavonoids and free radical scavenging activity of honey samples from the northern savannah region and southern rainforest ecosystems of Nigeria were investigated. Moisture and ash content of most samples were within acceptable limits. Total phenolic content ranged from 23.92 to 82.34mgGAE/100g for both ecosystems. Flavonoids varied between 2.52 – 27.21mgQE/100g for honey samples from the northern savannah zone and 9.17 – 22.38mgQE/100g for honey samples from the southern rainforest ecosystem. The samples exhibited good antioxidant activity using the DPPH assay and poor metal chelating activity. A linear positive relationship existed between antioxidant activity and total phenolics (R2= 0.85)/flavonoids (R2 = 0.78). The analyzed honey samples possess valuable antioxidants for culinary and medicinal uses.
Basil Nse Ita
Organic Chemistry Section, Department of Chemistry, University of Uyo, P. M. B 1017 Uyo, Akwa Ibom State, Nigeria
26 April, 2011
28 July, 2011
30 July, 2011
01 August, 2011