Antioxidant activities and phenolic content of Solamun and Capsicum sp

Fourteen Solanum cultivars (S. aculeatissimum, S. melongena, S. torvum, S. trilobatum, S. stramonifolium, S. mammosum and S. wrightii) and fourteen Capsicum cultivars (C. annuum, C. frutescens and C. minimum) cultivated in Thailand were determined their total phenolic contents in term of gallic acid (g) per 100 g of crude extract and per 100 g of dry herb powder. The total phenolic content of Solanum sp. were in range of 1.55-4.39 g/100 g of crude extract and 0.34-1.13 g/100 g of dry herb powder and of Capsicum sp. were in range of 2.02-3.28 g/100 g of crude extract and 0.49-1.02 g/ 100 g of dry herb powder. The antioxidant activities were measured by Trolox Equivalent Capacity Assay (TEAC). The TEAC values of Solanum sp. were in range of 0.01 0.03 and of Capsicum sp. were 0.01 0.02. The antioxidant activities of Solanum and Capsicum sp. presented linear relationship to their total phenolic contents, which indicated that 50.48% and 0.07% of antioxidant activities of Solanum and Capsicum sp. came from their total phenols, respectively.