Kinetic Study of Singlet-Oxygen Quenching and Aroxyl-Radical Scavenging Activities of Vitamin E Homologs and Fatty Acids Present in Vegetable Oils.

Recently, singlet-oxygen (O) quenching and aroxyl-radical (ArO·) scavenging rates (k and k, respectively) of eight vegetable oils were measured in the ethanol/chloroform/DO solution. Furthermore, the k and k values and concentrations of four tocopherols and four tocotrienols contained in the vegetable oils were measured. In this study, the concentrations of nine fatty acids (including stearic, oleic, linoleic, and linolenic acids) comprising the above-mentioned eight vegetable oils were determined by gas chromatography.