Abstract
ABSTRACT There are two food production processes that involve the replacement of one ingredient with other substance or a mixture of two or more products. One of them is adulteration of food products. This applies to high-cost and high-quality oils e.g. olive oil that is frequently subject to adulteration with other edible oils of lower value. Such a food fraud affects the quality of the gentle oil and the foods the ingredient of which is olive oil. The second action often applied to the oils is blending of the variety of products originating from many different regions and countries. Sometimes the oils originating from various sources and years are blended to create a consistent taste. The subject of this paper is the application of the multi-analysis method to assess the process of the blending of several oils and thus creating a new mixture to satisfy the market demand for new hitherto unknown oils, advertised as new products. For this task we con-