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A rapid method for the estimation of unsaturation of fats and oils by use of hypochlorous acid reagent
Author(s) -
Mukherjee S.
Publication year - 1955
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf02640382
Subject(s) - reagent , degree of unsaturation , hypochlorous acid , chemistry , anhydrous , sodium hypochlorite , organic chemistry , hypochlorite , solvent , chromatography
Summary A rapid method for the determination of unsaturation of oils and fats containing non‐conjugated ethylenic linkages has been developed, using hypochlorous acid as the reagent. The method has several advantages, viz. , that the estimation is conducted with an aqueous solution of sodium hypochlorite reagent, and moreover no oil solvent is required for the estimation. In all the methods currently employed, the reagents used must be perfectly anhydrous otherwise incomplete addition will take place, giving low results. Since a reaction time of 4 to 5 min. is recommended, the estimations are much more rapid than the customary Wijs or Hanus methods. No discrimination as to time factor need be made for oils possessing different degree of saturation. All oils, whether belonging to non‐drying or drying groups, give accurate results within the specified time. There is no secondary reaction except in the case of castor oil, but even in that case the secondary reactions are not appreciable within the first hour of reaction. The present method compares favorably with the standard procedures currently employed for determination of unsaturation.