title: Effects of relative humidity on the antioxidant properties of α-tocopherol in stripped corn oil.
abstract: The effects of relative humidity (RH) on the antioxidant properties of α-tocopherol (10, 20, 42, and 84 ppm) were determined in stripped corn oil oxidised at 60°C. The degree of oxidation in oils was determined by analysing headspace oxygen content and conjugated dienoic acids (CDAs). Changes in moisture and α-tocopherol content were also monitored. The oxidative stability of stripped corn oil and stability of α-tocopherol differed significantly depending on the RH. As the concentration of α-tocopherol increased from 10 to 84 ppm, oxidative stability decreased significantly irrespective of RH. The remaining α-tocopherol content decreased as RH increased, suggesting an important role for moisture content in the stability of α-tocopherol. Antioxidant properties of α-tocopherol were greatly influenced by both moisture content in oil and α-tocopherol concentration.
authors.affiliation: Department of Food Science and Biotechnology, Sungkyunkwan University, Suwon, Republic of Korea.
authors.forename: Ji Young
authors.initials: JY
authors.lastname: Kim
authors.affiliation: Department of Food Science and Biotechnology, Sungkyunkwan University, Suwon, Republic of Korea.
authors.forename: Mi-Ja
authors.initials: MJ
authors.lastname: Kim
authors.affiliation: Department of Food Science and Biotechnology, Sungkyunkwan University, Suwon, Republic of Korea.
authors.forename: BoRa
authors.initials: B
authors.lastname: Yi
authors.affiliation: Department of Food Science and Biotechnology, Sungkyunkwan University, Suwon, Republic of Korea.
authors.forename: Sumi
authors.initials: S
authors.lastname: Oh
authors.affiliation: Department of Food Science and Biotechnology, Sungkyunkwan University, Suwon, Republic of Korea. Electronic address: s3hun@skku.edu.
authors.forename: JaeHwan
authors.initials: J
authors.lastname: Lee
mesh_terms: D000975:Antioxidants; D003314:Corn Oil / Q000737:chemistry*; D006813:Humidity / Q000009:adverse effects*; D010084:Oxidation-Reduction; D010938:Plant Oils / Q000737:chemistry*; D024502:alpha-Tocopherol / Q000032:analysis*
chemical_list: D000975:Antioxidants; D010938:Plant Oils; D003314:Corn Oil; D024502:alpha-Tocopherol
keywords: Antioxidant polar paradox; Relative humidity; Stripped corn oil; α-Tocopherol