Akademik Veri Yönetim Sistemi
Mühendislik Bilimleri ve Tasarım Dergisi, cilt.13, sa.1, ss.177-184, 2025 (Hakemli Dergi)
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 𝑆11 value of the antenna, and the change in
𝑆11 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.