Efficacy of Different Sesame Oil Refining Stages in Reduction of Heavy Metals, Antioxidant Activity, and Oxidative Parameters

The efficacy of different refining stages on physicochemical parameters, heavy metal, and mineral contents sesame oil were investigated. from (crude oil, neutralization, bleaching, deodorization, stages) was taken the local factory in Yazd, Iran. fatty acid composition samples determined by GC-FID. oxidation indexes including peroxide value, p-Anisidine, free acid, TOTOX, total polar material, as well antioxidant activity (FRAP DPPH), phenolic content measured. metal analyzed ICP-OES. Linoleic (41.1-42.4%), oleic (41-41.4%), palmitic (8.3-9.1%), stearic (6.1-6.3%) reported most dominant acids all samples. results illustrated that process had no significant effects except for slight changes acid. It shown indexes, activity, mineral, metals decreased during refining. highest decrease oxidative deodorization stage. content, DPPH, FRAP ranged 4.79 to 56.56 mg GAE/100 g, 6852.64 867.89 mg/ml, 54.74 127.4 mM FeSO4.7H2O RSO CSO, respectively, which neutralizing order P>Ca>K>Fe>Mg>Al>Cr>Pb>Ni>Cd>Cu>Co. Although process, Pb concentration (0.16 mg/kg) evaluated higher than permissible limit. Considering effectively reduces undesirable compounds, consumption crude is not recommended.