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. 2020 Spring;19(2):115–126. doi: 10.22037/IJPR.2020.1101033

Table 2.

DPPHa radical scavenging activity of surfactin and rhamnolipid biosurfactants in comparison to BHAb and vitamin E

Sample/Antioxidant IC 50 (Concentration-activity correlation)
Surfactin 2.73 mM (y = 10.299x + 22.293 , r2 = 0.8976)
Rhamnolipids 4.15 mM (y = 3.8367x + 34.236 , r2 = 0.9953)
Vitamin E 0.036 mM (y = 789.71x + 19.4 , r2 = 0.9585)
BHA 2.86 mM (y = 16.057x + 4.4213 , r2 = 0.9743)

aDPPH: 1, 1- diphenyl-2-picryl hydrazyl. bBHA: butylated hydroxyanisole.