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7958336 
Journal Article 
Collaborative test of determination of iodine value in fish oils .2. Carbon tetrachloride or cyclohexane acetic acid as solvents 
Barlow, SM; Bimbo, AP; Miller, EL; Thorisson, S; Walters, DE 
1997 
Yes 
Journal of the American Oil Chemists' Society
ISSN: 0003-021X
EISSN: 1558-9331 
74 
9 
1085-1088 
English 
WOS:A1997XW32600009 
Nine laboratories participated in a collaborative test to determine the iodine value (IV) of eight samples of fish oil (four with IV < 150; four with IV > 150) with either carbon tetrachloride (AOCS Official Method Cd 1-25) or cyclohexane/acetic acid (AOCS Recommended Practice Cd 1d-92) as solvent and 1 h of reaction time. Laboratories received coded duplicate samples (hidden duplicates) and carried out duplicate determinations on each oil by each method (open duplicates). Replacing carbon tetrachloride with cyclohexane/acetic acid resulted in similar mean values for both low- and high-IV oils and similar estimates of repeatability and reproducibility. The repeatability standard deviation (sr), based on hidden duplicates, with carbon tetrachloride and cyclohexane/acetic acid were 1.71 and 1.55, respectively. The corresponding reproducibility standard deviations were 1.81 and 1.98. 
acetic acid; carbon tetrachloride; collaborative test; cyclohexane; fish oil; iodine value