Effect of Fortifying Sunflower Oil with Different Levels of Turmeric Powder and Studying its Physicochemical Properties

Abstract

Abstract Turmeric powder was added to sunflower oil at different concentrations (0, 2, 4, 6)%. The oil was stored for 21 days at a temperature of 60 °C for the purpose of studying the physicochemical properties of the oil. The viscosity was the highest value (65.46) centipedes for the sample fortified with 6% turmeric in the period (21) days, and the lowest value for the control sample was (65.46) centipedes in the period (21) days. It was found that the highest refractive index value was found in the control sample, which amounted to 1.497 during a period of (21) days, while the lowest value of the refractive index was in the 2% sample fortified with turmeric, and amounted to 1.465, a day during a period of (21) days. While the highest concentration of the density was (0.855) g. / cm for the 6% sample fortified with turmeric in the period (21) days, while the lowest concentration of the control sample was (803.0) g / cm in the period (21) days. Also, the highest pH value was (3.85) mg / potassium hydroxide / gm at the 21-day period for the control sample, and the lowest concentration for the 2% sample supported with turmeric was (1.25) mg / potassium hydroxide / gm at the 21-day period. While the highest value of the iodine number for the 6% sample fortified with turmeric was (125.52) in the period (0) days, and the lowest value of the iodine number for the control sample of sunflower oil was (110.63) during the period (21) days. While the highest value of the peroxide number for the control sample was (5.53) mg / potassium hydroxide / gm in the period (21) days, and the lowest value for the 2% sample fortified with turmeric was (3.15) mg / potassium hydroxide / gm in the period (21) days. It was observed that the highest level of saponification number in the control sample amounted to (214.60) mg / potassium hydroxide / g during storage periods (21 days) and the lowest value of the saponification number in the 2% sample fortified with turmeric when it reached (191.04) mg / potassium hydroxide / g during the storage period. (21 days. It was found that the highest value of thiobarbituric acid for the control sample was (4.53) mmaldehyde/kg oil in the period of (21) days, while the lowest value was for the 2% sample fortified with turmeric, as it amounted to (2.37) mmaldehyde/kg oil in the period (21) days.