Health & Environmental Research Online (HERO)


Print Feedback Export to File
7943012 
Journal Article 
Anomalous high iodine value of squalene and the impact on iodine values of shark liver oils 
Ackman, RG; Macpherson, E; Timmins, A 
1998 
Yes 
Journal of the American Oil Chemists' Society
ISSN: 0003-021X
EISSN: 1558-9331 
75 
9 
1223-1225 
English 
WOS:000075979000027 
Squalene has six ethylenic bonds, but the experimental iodine values in two different solvent systems-chloroform and cyclohexane/acetic acid - were 25% higher than the theoretical values. We propose that this results from an additional halogen adding at each of the two terminal ethylenic bonds carrying two methyl groups. In the solvent system of cyclohexane alone, the excess is only 3-4% greater than the theoretical. Mixtures of squalene in seal oil confirmed the additivity of the experimental squalene high iodine value and the seal oil fatty acid iodine value with reasonable accuracy but depended on the skill of the operator in obtaining the titration end point for cyclohexane/acetic acid. This observation has particular relevance for shark liver oils and olive oils. 
iodine value; olive oil; shark liver oil; squalene