Pdf the use of peroxide value as a measure of quality. When the monograph does not specify the method to be used, method a is applied. The peroxide value is a parameter specifying the content of oxygen as peroxide, especially hydroperoxides in a substance. This method describes the determination of peroxide values for animal oils and fats, vegetable oils and fats, as well as for flavour and fragrance materials. The oxidation of food lipids is undesirable due to offflavors, toxins, and loss of fatsoluble vitamins. Peroxide value theperoxidevalueip is the number that expresses in milliequivalents of active oxygen the quantity of peroxide contained in g of the substance, as determined by the methods described below. Pdf redox potentiometric determination of peroxide value in. The peroxide value is a measure of the oxidation present. The determination of the peroxide value is the traditional and most used parameter for measuring the primary products of oxidative degradation. The peroxide value could increase corresponds with the storage time, contact with air of the oil samples and temperature zahir et al. Pdf quantitative determination of peroxide value pv and acidity. Pdf standard methods for peroxide value determination in edible oils, which are based on ki oxidation by the hydroperoxides and volumetric.
Fungi value is an indicator that ensure the sanitation of samples. A lower number of peroxides indicates a good quality of oil and a good preservation status. Pdf a rapid fourier transform nearinfrared ftnir spectroscopic method was developed for quantitative determination of peroxide value. Johns oil are used in food, cosmetics, and medicine. Some fixed oils like walnut, hazelnut, wheat germ, sesame, nettle seed, grape seed, and st. Determinations of peroxide values, free fatty acids and acid values revealed no.
The peroxideformation curves at 100, 75, 55, 35, and 15 show a progressive increase in maximum peroxide value reached as the temperature is lowered. Opinion of the scientific panel on dietetic products, nutrition. The peroxide value is a useful indicator of the extent of oxidation of lipids, fats, and oils. Pdf determination of peroxide values of some fixed oils. Peroxide value pv is related in measuring rancidity reactions and can be used as an indication of the quality and stability of fats and oils ekwu and nwagu, 2004. Pv exceeds the maximum recommended value of 10 meqkg after 45 days for sunflower oil exposed to daylight. Oxidation over time as measured by peroxide value, with and without the addition of an.