Identification of Adulteration in Edible Oil Based on Conductivity Change

The water phase conductivity of rapeseed oil,corn oil and peanut oil was measured by conductivity method. The simulation experiment of peanut oil adulteration was carried out,and the pattern recognition of peanut oil was studied by using conductivity value as information data. The results showed that the conductivities of peanut oil,rapeseed oil and corn oil in water phase were determined to be(15.41±0.17) μS/cm,(18.93±0.13) μS/cm and(9.45±0.09) μS/cm. The conductivity of peanut oil added by different proportions of rapeseed oil and corn oil changed,and the fitting relationship between peanut oil content in the adulterated oil and conductivity was good. The models of intermixing in different proportions can realize quantitative analysis of edible oils. It had good prediction and recognition ability to use conductivity as characteristic information data for pattern recognition of edible oils adulteration.