Detecting admixtures of vegetable oils in sunflower oil using physico-chemical methods

Systems of sunflower oil containing rapeseed oil or cotton oil were studied. Data on the color characteristics of the specified sample mixtures in СIE La* b* and XYZ colorimetric systems were obtained. The metric brightness, purity of color and metric angle were determined. Regressive dependencies between the specified parameters and the concentration of rapeseed or cotton oil admixtures were found, which permit the quantitative determination of the admixture content. The qualitative detection of the latter is possible using transmission spectra in the visible region and infrared spectra.