FOR PHYSICOCHEMICAL PARAMETERS Oryzanol | Saponification value | Iodine value | Unsaponifiable matter | Moisture and insoluble impurities | Refractive index | Colour | Specific gravity | Acid value | Argemone oil | Flash point | Mineral oil | Presence of hexane
Oryzanol, % Requirement: Not less than one per cent
Oryzanol is a natural antioxidant and is known to reduce the absorption and deposition of LDL and VLDL (bad) serum cholesterol. Oryzanol also helps in reducing hypertension. It improves bone-mineral density and liver function and gives relief from gastrointestinal distress. Clinical trials conducted in Japan have shown that 300 mg per day is the effective dose of oryzanol. Oryzanol was well above the minimum requirement in all tested brands, ranging between 1.25 per cent and 1.81 per cent. Porna had the highest percentage and Riso the lowest. Saponification value The saponification value helps to detect the presence of other oils/fats. Saponification value of rice bran oil should be between 180 and 195.
All brands were within the specified limit. Iodine value The iodine value is a measure of unsaturated fats.
All brands were within the specified limit. Unsaponifiable matter Unsaponifiable matter includes those substances frequently found dissolved in fatty acids and drying oils which cannot be saponified by caustic treatment,