Liquid chromatographic determination of α-, β-, γ-, and δ-tocopherol in sesame oils of different origin

Abstract

The contents of α-, -, γ-, and -tocopherols in sesame oils were determined by high performance liquid chromatography with UV detection. α-Tocopherol contents ranged from 10.28 to 19.79 mg/g oil, -tocopherol contents from 8.22 to 20.10 mg/g. However, both γ- and -tocopherol were less than 1.49 mg/g or not detected. γ-Tocopherol was not detected from both unroasted white and black sesame seed oils. Significantly higher level of tocopherol in sesame oil than other oils is an evidence of the reason why it is highly stable and prevents oxidation. The tocopherol composition for twenty sesame oils was classified by using principal component analysis.