Proceedings Volume 2010 (format .pdf) - SimpBTH

Table 3. Chemiluminescence characteristicsSample code k (s -1 ) v i (s -1 ) AA % [CL]PVA 1 0.102 120.51 92.40PVA 2 0.095 291.48 87.10PVA 3 0.090 104.21 89.70PVH 4 0.086 145.24 90.15PVH 5 0.100 118.84 94.02PVH 6 0.116 183.21 80.01PVH 7 0.094 291.74 78.91Quercetine 0.101 128.83 92.80Kaemferol 0.105 124.80 92.49Rutine 0.093 291.40 77.40Apigenin 0.098 289.20 82.62Chlorogenic acid 0.096 100.00 87.20Caffeic acid 0.070 318.00 82.90Galic acid 0.112 166.46 85.70CL [a.u.]6 50 06 00 05 50 05 00 04 50 04 00 03 50 03 00 02 50 02 00 01 50 01 00 050 0P V A 2P V A 1P V A 300 5 0 1 00 1 5 0 2 00 25 0 3 00T im e [s]Fig 2. CL evolution in time of the samples PVA1-PVA3Antioxidant activity and the rate constants of the reaction (table 3)emphasize high protective capacity of the extracted components. The antioxidantactivity of the flavonoidic vegetal pigments is attributed to the active principles,especially to the flavonoids content.The qualitative and quantitative content of the phenolic and flavonoidicconstituents in the samples, confirmed by spectral analysis and chemiluminescencedeterminations, explain the high value of the antioxidant activity, especially for thesample PVH 5 (94.02%) [25].CONCLUSIONSThe extractive process conducted to the obtaining of seven flavonoidic vegetalpigments from Agrimonia eupatoria L. and Hypericum perforatum L. Spectralinvestigations (UV-VIS) on the flavonoidic vegetal pigments emphasized thepresence of some phenolic and flavonoidic structures, also confirmed by236