The oil had 0.387+-0.043, 2.907+-0.197, 118.8+-2.997 and 188.83+-1.678 acid value,
peroxide value, iodine value and saponification value, respectively.
The AOCS Cd 8-53 method adapted [47] was used to measure the primary oxidation product, expressed as the
peroxide value (PV) [48].
The initial
peroxide value was 53.3 [+ or -] 0.850 meq/1000g of fat.
The
peroxide values observed for Castor oil was higher than the other feed stocks as represented in Table 1.
The acid value (AV) and the
peroxide value (PV) were determined according to IUPAC 2.201 [12] and IUPAC 2.501 [13], respectively.
A 250-gram sample/replicate was retained from each trial for oil extraction for
peroxide value determination.
Peroxide value of seed oils were measured using the AOCS method [15].
Physicochemical properties such as moisture, color, freezing point AdegC, smoke point AdegC, refractive index (40AdegC), free fatty acids (FFA), saponification value, iodine value,
peroxide value and fatty acids composition of industrially processed cottonseed oils were measured according to the American Oil Chemists Society (AOCS) methods [9]..
Refractive index, density, specific gravity, surface tension, acid value, free fatty acid value, saponification value, iodine value, colour and
peroxide value were carried out.
Rancimat oxidation stability induction period (IP),
peroxide value (PV), total acid number (TAN), and FAME composition were measured.
Typical applications include the continuous measurement of protein, fat, lactose and total solids in milk products; chemical oxygen demand (COD) in waste water flow of dairies or cheese factories; and measuring free fatty acids, total polar material,
peroxide value, moisture, dirt and other values during edible oil and fat processing.
Peroxide Value.
Peroxide value was determined by incubating a mixture of oil and chloroform/acetic acid (10: 15, vol/vol) with a solution of potassium iodide in the dark for 5 min.