Abstract
AbstractFree fatty acids in small vegetable oil samples were determined by gas liquid chromatography after a modified BCl3 or BF3/methanol esterification procedure with methylurea. This compound was found to sufficiently reduce triacylglyceride transesterification during free fatty acid esterification with BC13 or BF3 methanol. Good results were obtained using this new procedure on neutral lipid oils containing known amounts of free fatty acids. Good agreement between the new method and the A.O.C.S. titration method was also demonstrated on commercial and laboratory‐extracted crude oils. Because very small oil samples (200 mg) can be analyzed, the new method could be applicable for oilseed physiological studies.
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