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Determination of Iodine Values Using 1,3-dibromo-5,5-dimethylhydantoin (DBH) Without the Employment of Chlorinated Hydrocarbons. Analytical Methods of Pharmacopoeias With DBH in Respect to Environmental and Economical Concern. Part 17

Determination of Iodine Values Using 1,3-dibromo-5,5-dimethylhydantoin (DBH) Without the Employment of Chlorinated Hydrocarbons. Analytical Methods of Pharmacopoeias With DBH in Respect to Environmental and Economical Concern. Part 17

M Hilp

Pharmazie. 2002 Aug;57(8):538-42.

PMID: 12227193

Abstract:

Low and medium iodine values of fixed oils and fats can be determined in glacial acetic acid within reduced waiting times of only 5 min. Highly unsaturated compounds such as those of linseed oil, cod-liver oil, sunflower oil, soybean oil, wheat germ oil and the emulsifier sorbitan trioleate result too low values in comparison to PH. EUR. 2002 [2] and USP 2000 [3]. Cocoa butter with a low iodine number is insoluble in glacial acetic acid. The iodine values of nonionogenic emulsifiers such as ceteareth-30 (Macrogol cetostearyl ether PH. EUR. 2002), oleth-10 resp. 20 (Macrogol oleyl ether PH. EUR. 2002) and polysorbate-80 PH. EUR. 2002 are obtained in aqueous solutions. Oleth-2 (Macrogol oleyl ether PH. EUR. 2002), polyoxyl-40 castor oil (Macrolglycerol ricinoleate PH. EUR. 2002), polysorbate-60 PH. EUR. 2002 and sorbitan trioleate PH. EUR. 2002 need the addition of ethyl acetate. Fixed oils even with high iodine values can be determined in an o/w emulsion with a reaction time of 5 min in most cases, when nonionogenic emulsifiers such as ceteareth-30, polyoxyl-30 glycerol monolaurate or polyoxyl-60 hydrogenated castor oil (Macrolglycerol hydroxystearate PH. EUR. 2002) are used.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP9004959	Polyoxyl 20 cetostearyl ether		9004-95-9	Price

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