Table 3. Antioxidant activity of the methanol extract of bark of Tampoi ( Baccaurea macrocarpa).

Average of three replicates performed for each concentration.

Sample	Concentration (ppm)	Absorbance		Inhibition	Percentage of inhibition (%)	IC 50 (ppm)
		Sample	Blank
Bark	20	0.2190	0.4150	0.47229	47.229	11.15
	40	0.0560		0.88193	88.193
	60	0.0490		0.86506	86.506
	75	0.0305		0.92651	92.651
Vitamin C	2	0.5470	0.6700	0.18360	18.360	3.28
	4	0.1530		0.77160	77.160
	6	0.0450		0.93280	93.280
	8	0.0340		0.94930	94.930