The Linear Correlation Between Electrical Conductivity and Double Variables (Peroxide Values plus Acid Values) for Edible Oils
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Abstract:
Theoretically, electrical conductivity can be used to evaluate the quality of edible oils. Given its convenience, it has the brilliant application in normal kitchens. However, since the correlation between electrical conductivity and polar component of edible oils was poor, some researchers have contemplated its accuracy. In order to clarify the relationship between electrical conductivity and other indexes of edible oils, this paper detected the peroxide values, acid values, and the electrical conductivity of seven edible oils when they were stored at 60 ℃. The results showed that there was little correlation between electrical conductivity and acid value, , while there was a linear correlation between electrical conductivity and the double variables (peroxide values plus acid values). Among the oils tested, maize germ oil and peanut oil had correlation coefficients higher than 0.98. Therefore, electrical conductivity can be used for the rapid detection of edible oils.
