title: Vitamin E profile as a reliable authenticity discrimination factor between chestnut (Castanea sativa Mill.) cultivars.
abstract: In this study, the profile of tocopherols and tocotrienols in chestnut ( Castanea sativa Mill.) kernel oil was evaluated. Four Portuguese chestnut varieties were selected: Aveleira, Boaventura, Judia, and Longal. The vitamin E determination had already been applied to similar matrices, but, to the authors' knowledge, it is the first time that chestnut kernel oil has been evaluated. The prevalent vitamer was gamma-tocopherol, often present in trace amounts in other natural products. Due to the high commercial value of chestnut, a statistical analysis of the obtained results was also conducted to define the tocopherol and tocotrienol profile as a reliable indicator of a specific chestnut variety. To achieve this objective, an analysis of variance was performed to evaluate the accuracy of the method as well as the uniformity of results for each variety. A discriminant analysis was also carried out revealing quite satisfactory results. Four varieties were clustered in four individual groups through the definition of two discriminant analysis dimensions.
authors.affiliation: REQUIMTE/Servico de Bromatologia, Faculdade de Farmacia da Universidade do Porto, Porto, Portugal.
authors.forename: João C M
authors.initials: JC
authors.lastname: Barreira
authors.forename: Rita C
authors.initials: RC
authors.lastname: Alves
authors.forename: Susana
authors.initials: S
authors.lastname: Casal
authors.forename: Isabel C F R
authors.initials: IC
authors.lastname: Ferreira
authors.forename: M Beatriz P P
authors.initials: MB
authors.lastname: Oliveira
authors.forename: José Alberto
authors.initials: JA
authors.lastname: Pereira
mesh_terms: D029962:Fagaceae / Q000737:chemistry*; D009754:Nuts / Q000737:chemistry*; D010938:Plant Oils / Q000032:analysis; D011786:Quality Control; D024508:Tocotrienols / Q000032:analysis; D014810:Vitamin E / Q000032:analysis*
chemical_list: D010938:Plant Oils; D024508:Tocotrienols; D014810:Vitamin E