Detection of Adulteration in Canola-Virgin Olive admixture using Instrumental Gas Liquid Chromatography and UV Spectroscopy

This paper describes an investigation into usefulness of some instrumental methods (glc and uv spectroscopy) in the detection of adulteration of olive oil with olive-pomace oil (it is relatively cheap oil mixed as adulterants with olive oil) in the admixture of virgin olive oil and canola oil (0 up to 30% virgin olive oil). it was observed that 5% pomace is detectable with sterol separation using glc analysis. erythrodiol and uvaol is two compounds which are recognized in admixture containing pomace oil. the limit of detection (lod) and limit of quantification (loq) of glc method are 0.09% and 0.3% respectively. there is good correlation between uv absorption coefficient (k270) and extent of pomace oil in admixture (r=0.9721).