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Reactions of fatty materials with oxygen. IV. 1 Quantitative determination of functional groups
Author(s) -
Knight H. B.,
Swern Daniel
Publication year - 1949
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/bf02651446
Subject(s) - saponification , chemistry , peroxide , oxygen , functional group , iodine , organic peroxide , organic chemistry , radical , copolymer , polymer
Summary Conventional analytical procedures employed in oxidation reactions for the quantitative determination of functional groups have been applied to a series of pure compounds as well as to two synthetic mixtures and to methyl oleate hydroperoxide (estimated purity, 70%). In the absence of peroxide and oxirane groups the analytical procedures are reliable. When peroxides are present, unusually high and variable values for carbonyl oxygen are obtained, and the iodine and saponification numbers are generally unreliable. Determination of hydroxyl oxygen is interfered with by large proportions of oxirane compounds but apparently not by peroxides. Determination of acid number and peroxide and oxirane oxygen is reliable in the presence of all the other functional groups investigated. Techniques for the accurate determination of functional groups when peroxide and oxirane groups are present are described. A modified procedure for the determination of carbonyl oxygen is reported.