Essential oils of flowers of Citrus sinensis and Citrus clementina cultivated in Algarve, Portugal

• Autor(a) principal: Miguel, Maria Graça
• Data de Publicação: 2008
• Outros Autores: Dandlen, S., Figueiredo, A. C., Barroso, J. G., Pedro, L. G., Duarte, Amílcar, Faísca, J.
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
• Texto Completo: http://hdl.handle.net/10400.1/2788
• topic: Citrus sinensis (L.) Osbeck (Cs); Citrus clementina Hort. Ex Tan.; Rutaceae; Flowers; Essential oils; Valencia late; Newhall; Barnfield; Rohde

The essential oils, isolated by hydrodistillation, from the flowers of different cultivars of Citrus sinensis (L.) Osbeck (Cs) and Citrus clementina Hort. Ex Tan. (Cc) collected at different harvesting times, were analyzed by GC and GC-MS. All the samples studied afforded yellowish oil which yields ranged from 0.05 to 0.08 % (v/w). The monoterpene fraction dominated both oils (66-91%), being the monoterpene hydrocarbons the main components of this fraction (45-69%). Sabinene (31-48%), linalool (15-32%) and limonene (4-10%) dominated both Cs and Cc oils. trans-Nerolidol was the major sesquiterpene component, attaining 3-10%. Cluster analysis of the essential oil composition from the twelve samples studied, confirmed a major chemical homogeneity (Scorr>0.95) despite the fact of having used different periods of hydrodistillation, different harvesting times and being flowers of two different Citrus species.