2.2.2. Analytical HPLCHigh performance liquid chromatography (HPLC) was per-formed to test the purity of the isolated lignans. A Shimadzu madeHPLC (model LCATVP) equipped with a reverse phase Spincotechenabled C18 reverse phase column (250 mm × 4.6 mm i.d., 5 mparticle size) fitted with UV detector (model SPD-10AVP) was used.The mobile phase consisted of methanol:water (70:30) run at a flowrate of 0.7 ml/min. The peaks were detected at 290 nm. For HPLCanalysis, the lignan crystal was dissolved in HPLC grade methanolto make a stock of 1 mg/ml. The lignan solution was filtered through0.45 m nylon membrane prior to injecting into the HPLC. 10 lsamples of the 0.0001 M of standard sesamin/sesamol/naringenin,independently as well as in their mixtures were injected into HPLCto determine their retention time (s).