Page 183 - Pharmaceutical Analytical Chemistry III
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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
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