Abstract
The study was conducted on the physicochemical characteristics of six brands of edible soybean oils including Non-brand (Open) soybean oil, Muskan, Pusti, Teer, Fresh and Rupchanda soybean oils. A significant difference in the moisture content (P< 0.05) was observed in the different brands of soybean oil. Rupchanda soybean oil possesses maximum saponification value (230) whereas open soybean oil showed minimum value (200). The iodine value of investigated oils also differed significantly. Highest iodine value (110.2) found in the Rupchanda soybean oil though it has not embraced the standard value (124-139) sated by Codex Alimentarius. All the soybean oil revealed preferred level of acid value except Muskan brand. The Pusti and Teer brands of soybean oil indicated maximum Reichert-Meissl value which means that they contain maximum volatile fatty acids compared to others. Although the highest per-oxide value 7.5 milliequivalents of active oxygen/kg oil found in the open soybean oil but it does not exceed the standard level. The unsaponifiable matter of the - Open oil, Muskan, Pusti, Teer, Fresh and Rupchanda soybean oils were 0.08, 0.06, 0.07, 0.04, 0.05 and 0.05 percent respectively. Considering the significance of above parameters Rupchanda is better than others soybean oil for human health.