Determination of saponification value of oil pdf

 

 

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Determination of Saponification value. SVs were determined by the AOAC official Method No. 920.160. A 0.1 N KOH solution was prepared with 95 % ethanol and distilled. 5 g of oil sample were weighed in a conical flask, the flask was connected to an air condenser and boiled until the oil was Aim: To determine the refractive index of oil Learn with flashcards, games and more — for free. Refractive index of oils increases with the increase in unsaturation and also chain length of fatty acids. increased unsaturation = increased refractive index eg. groundnut oil, soybean, rice bran oil - high Saponification value is defined as the amount of potassium hydroxide (KOH) in milligrams required to saponify one gram of fat or oil. It is a very important Iodine value of Oil and Fat. Redox titration by Automatic Potentiometric Titrator. Standard. 1) JIS K 0070-1992 Test Method for Acid value, Saponification number, Ester number, Iodine number, Hydroxyl value of Chemical products and Unsaponifiable matter. 20 Determination of saponification value. ISO 3657:2013. 1 Determination of oil content (Reference method) NOTE: The use of automated equipment based on the Randall technique, such as the Soxtec™ 2050 or the VELP Scientifica SER 148/6, may be used for the solvent extraction phases Experimentally determined iodine numbers (INexp) of the selected oils are listed as average values with their relative standard deviation (RSD) and compared with iodine numbers The Saponification Number is defined as the number of milligrams of potassium hydroxide required to saponify 1 g of oil. Fats and Oils and Related Products Fats and Oils (all). Arsenic. AOAC 952.13 (Codex general Refractive index Saponification value Unsaponifiable matter. Titre Acidity Apparent density. Determination of Biotoxins in live and raw bivalve molluscs The method selected should be chosen This document specifies a method for the determination of the saponification value of animal and vegetable fats and oils. If mineral acids are present, the results given by this method are not interpretable unless the mineral acids are determined separately. As molecular weight decreases saponification value increases. The saponification value of the rancid extracted oil is negative, this is because the titre value of the concentrated HCl was greater than the blank titre. It was followed by vegetable oil, then soya bean oil then olive oil and margarine had 2.3 Saponification Value Determination. Saponification value or "Saponification number", also referred to as "sap" in short, represents the number of. milligrams of potassium hydroxide or sodium hydroxide required to saponify 1g of fat under the conditions. 1.1 This test method covers the determination of the saponification value of fats and oils. 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.3 This standard does not purport to address all of the safety concerns, if any 1.1 This test method covers the determination of the saponification value of fats and oils. 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.3 This standard does not purport to address all of the safety concerns, if any saponification value. Color Determination: Color of the respective oils was determined by physical observation in day light and under ultraviolet radiation Determination of Optical Rotation: 10ml Polari meter tube containing oil was placed in the trough of the instrument between polarizer and analyzer. Figure 4: Determination of the saponification value (blue = titration curve, red = ERC). Comments. The potassium hydroxide solution should be straw The acid value or acid number, and the free fatty acid content are employed for the determination of oils and fats and as quality control parameter.

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