Investigating the Composition of Fatty Acids in Refined Hemp and Soybean Oil and Comparing Their Oxidative Stability and Physicochemical Properties

Subject Areas :

Maryam Beheshti ¹ , Mohammad Reza Taherian ^{2 *}

1 - MSc Graduated of Animal Science, Kashmir Branch, Islamic Azad University, Kashmar, Iran
2 - Professor, Department of Animal Science, Kashmer Branch, Islamic Azad University, Kashmar, Iran.

Received: 2022-12-15 Accepted : 2023-02-06 Published : 2025-03-09

Keywords: Chromatography, Oxidative Stability, Soybean Oil, Hemp Oil, Physicochemical Properties.,

Abstract :

Due to prolonged exposure to high temperatures, storage and the presence of oxygen in the environment, oils undergo quality changes, especially oxidation. Hemp and soy are among the few plants that contain omega-3 and omega-6 fatty acids. In this research, the refined oil of both seeds was prepared, and the percentage of fat, moisture, and the refractive index of the refined oil of hemp and soybeans were performed as physical tests, and the peroxide, iodine, and soap index and oxidative stability were performed as chemical tests.Then, the components of each of them were identified and quantified by gas chromatography-mass spectrometer. According to the results, the refractive index (1.46) and the fat percentage (34) of both hemp and soybean oil have statistically significant differences. It did not have any and was the same (P<0.05). The highest amount of moisture in hemp oil was 1.63%, the amount of soap index was 191.9, iodine index was 136.87, and peroxide was 1.05 in hemp oil, more than soybean oil, and the oxidative stability of hemp oil was 12.695 hours and The index of oxidative stability of soybean oil was 15.250 hours, and the oxidative resistance of soybean oil was higher.The main compounds in soybean oil were palmitic acid (11.6), oleic acid (22.4) and linoleic acid (53.8) and in hemp oil oleic acid (17.16), linoleic acid (57.59) and linoleic acid (15.3). Soybean oil has a higher percentage of acceptability than hemp oil in the review of available factors.

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