Iodine value means the “g” value of halogen which adhere to g of methods such as Hanus method and Wijs method for Iodine value. The processors of oil and fat are in need of a quick determination method of iodine value of oils and fats especially in case of checking the degree of. This test method covers the determination of the iodine value of fats and iodine value of fats and oils that do not contain conjugated 3 Wijs Solution ( Iodine Monochloride Solution) may be purchased commercially. 1.

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The chemical reaction associated with this method of analysis involves formation of the diiodo alkane R and R’ symbolize alkyl or other organic groups:.

These fatty acids can be classified into saturated wins unsaturated based on the number of double bonds present in the fatty acid. For reproduction of material from PCCP: So handle the reagent with gloves.

After the reaction is complete, the amount of iodine that has reacted is determined by adding a solution of potassium iodide to the reaction product. The processors of oil and fat are in need of a quick determination method of iodine value of oils and fats especially in case of checking the degree of unsaturation of them in the hydrogenation process.

This unsaturation is in the form of double bondswhich react with iodine compounds. Ullmann’s Encyclopedia of Industrial Chemistry.

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Iodine value

Please enable JavaScript to access the full features of the site or access our non-JavaScript page. From Wikipedia, the free encyclopedia. Journal of Japan Oil Chemists’ Society.

The Wijs method as the standard for iodine absorption J. Search articles by author J.

On the Determination of Iodine Value by the Wijs’ Method

Reproduced material should be attributed as follows: This causes the remaining unreacted ICl to form molecular iodine. Analytical chemistry Dimensionless numbers of chemistry Iodine.

Retrieved from ” https: Unreacted iodine monobromide or monochloride is then allowed to react with potassium iodideconverting it to iodine, whose concentration can be determined by titration with sodium thiosulfate. Saturated fatty acids will not give the halogenation reaction.

Triglycerides are made up of three fatty wijjs linked to glycerol by fatty acyl esters. For reproduction of material from NJC: Authors have investigated other methods of quick determination of iodine value especially for the oils in vlue hydrogenation process and have found after all the Wijs’ method could be appropriate by only shortening the reaction time to three minutes for the oils of the iodine value less than about For reproduction of material from all other RSC journals and books: Rapeseed and Canola Oil: Back to tab navigation Download options Please wait Unsaturated fatty acids contain double bonds between the carbon atom in addition to the single bonds present in the fatty acid chain.

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Journal of Oil Chemists’ Society, Japan.

December 20, received: Retrieved 1 Januaryfrom vlab. Authors contributing to RSC publications journal articles, books or book chapters do not need to formally request permission to reproduce material contained in this article provided that the correct acknowledgement is given with the reproduced material.

Addition of iodine chloride and back-titration with sodium thiosulphate by DIN Mercuric acetate, however, cannot be empolyed now because the reaction solution is hard to meet the regulation of water pollution and its disposal has become difficult.

This may take some time to load. May 07, accepted: This would lead to undesirable side reactions, and thus falsifying a result consumption of bromine.

Oidine you are not the author of this article and you wish to reproduce material from ioddine in a third party non-RSC publication you must formally request permission using Copyright Clearance Center. Kapok seed oil [9]. Estimation of Iodine Value of Fats and Oils.

Iodine value – Wikipedia

Fatty acids are long chain hydrocarbons with carboxyl groups COOH groups. Already have an account? Jump to site search. The first page of this article is displayed as the abstract.