COMPARISON OF IODINE VALUES (IV) OF CRUDE PALM OIL FROM GLC CALCULATIONS WITH THOSE FROM WIJS METHOD

A.H.G. CHIN and W.L. SIEW

SUMMARY

Iodine values (IV; ranging from 50 - 55) of crude palm oil determined by titration (Wijs method) were compared with ìwo different sets of calculated IV's derived from fatty acid composition (FAC) by gas chromatography (GLC). The calculated values were obtained by using two sets of factors, one based on the fatty acid molecular weights and the other based on the methyl ester molecular weights. Statistical analysis of the results obtained showed that the latter gave IV's which were better correlated with the IV's by the Wijs method. A relationship of y = 0.46x + 28.98 where y is the expected IV by Wijs method and x is the calculated IV using FAME factors, has been shown to give good fit with observed values.

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