2.3.4. Lipid Peroxidation Inhibition Assay
The lipid peroxidation assay was carried out by a modified
procedure of Ohkawa et al. [12]. Different concentration
of the sample (1 - 10 mg/ml) in water was added
to 0.5 ml of the 10% goat liver homogenate. Lipid peroxidation
was initiated by adding 0.05 ml of 0.07 mol/m3
ferrous sulphate to the reaction mixture. After 30 min,
1.5 ml of 20% acetic acid (pH 3.5), 1.5 ml of 0.8% TBA
(in 1.1% SDS) and 0.05 ml of 20 × 10–2 TCA was added
to the incubation solution, vortexed and boiled at 100˚C
for 1 h, cooled to room temperature and read the absorbance
at 532 nm. The percentage inhibition was then calculated.
% inhibition = [(Acontrol – Asample)/Acontrol] × 100%