Page 85 - Statistics presented by Dr. Sara Ismail Aborass
P. 85
9/8/2023
Iodine value
C C+ r CC
Br I
Xss measured
IBr + KI + KBr IODINENUMBEROFTRIGLYCERIDES
I+
+ FA double bond IV
Palmioleic acid C16:1 95
Oleic acid C18:1 85
173
Linoleic acid C18:2 260
Linolenic acid C18:3 320
167 Arashidonic acid C20:4
167
Significance
It is a measure of the degree of un-saturation center of FA moiety of
glycerides,
so it is useful for identifying the oil as DRYING (125 – 200),
SEMIDRYING (80 – 140),
NONDRYING (<80)
The greater the degree of unsaturation, the higher the IV, the greater
the liability of oil or fat to go rancid by oxidation
168
168
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