Feasibility of using a cylindrical resonator sensor for adulteration detection in sesame oil

Document Type : Research Article


1 Associate Professors, Department of Mechanical Engineering of Biosystems, Shahrekord University

2 B.Sc. Student, Department of Mechanical Engineering of Biosystems, Shahrekord University

3 Ph.D., Young Researchers Club, Islamic Azad University of Shahrekord


One of the important concerns regarding the food safety is widespread adulteration in food production which necessitates the development of precise and rapid diagnostic instruments more than ever. In this study, a cylindrical resonator sensor, developed in previous studies and examined for quality detection of some food materials, was applied for detection of adulteration in sesame oil mixed with corn, canola and sunflower oils. To measure the dielectric response of oil in 0-150 MHz frequency range, a new sensor with 400 mm long cylinder was fabricated. Adulteration samples were prepared with mixing pure sesame oil with the above mentioned oils at 15, 30 and 45% by weight and each sample was measured with three replications using the dielectric sensor. Statistical methods of principal component analysis (PCA), linear discriminant analysis (LDA) and support vector machine (SVM) were evaluated for detection of adulteration type and level from the dielectric spectral data. The biplot of the first two principal components showed excellent discrimination of adulteration type and level with 96% of variation explanation. As the best result, LDA classifier showed 96.7% accuracy for adulteration detection.

Graphical Abstract

Feasibility of using a cylindrical resonator sensor for adulteration detection in sesame oil


  • Adulteration detection in sesame oil was studies with dielectric properties.


  • A cylindrical dielectric sensor (resonator) was evaluated.


  • Adulteration in sesame oil was made with sunflower, corn and canola oils.


  • As the best result, classification with LDA showed 96.7% accuracy in differentiation of adulteration in sesame oil.


Main Subjects

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