DETERMINATION OF OLIVE OIL PURITY BY S PARAMETER

Vegetable oils are one of the products used in our daily lives, and the originality and purity of the oil used is important. Olive oil is highly preferred by people. Mixing different oils such as canola oil, sunflower oil, soybean oil, and other seed oils into olive oil to reduce its cost reduces its purity and leads to fraud. It is very difficult to detect these oils mixed with olive oil, and to understand whether the olive oil is pure or not when viewed visually. For the quality of the oil, values such as fluidity, base number, refractive index, acid numbers, and density must be measured, and analyzed. Extensive laboratory environments are required to control these chemical changes in oil. Instead of these laboratory environments, an easy-to-install, practical, and cost-effective electromagnetic analysis method has been proposed to determine the purity of oil. The S parameters of olive oil, sunflower oil and a mixture of the two were measured with a helix antenna between 2-4 GHz.Pure olive oil was determined by evaluating the reference S_11 value of the antenna, and the change in S_11 value, and resonance frequency shift when pure oil and impurity oil were present in the container. Due to mixed oil, a 12.5MHz frequency shift toward lower frequencies is observed, which shows that the proposed system can differentiate standard oil from non-standard.