Abstract
Authenticity of vegetable oils is of concern for commercial and health reasons. Fatty acid composition in the seed oil of locally grown
crops like corn, canola, soybean, sunflower and cotton were determined by GC/FID. From these fatty acids compositional fingerprints
certain factors were derived to be used as purity criteria for specific vegetable oil. The derived factors were applied for the detection
of adulteration in market samples of different edible oils (corn, canola, soybean and sunflower). The results revealed that corn, canola
and soybean oil of different brands were pure, but all the sunflower oil samples were found adulterated at varying levels (low to high).
One brand, labeled sunflower oil, contained 100% canola oil.
