The chemical composition of the essential oil from flowering tops of Achillea millefolium L. isolated by different distillation methods was studied, Samples were hydrodistilled with Clevenger-type (HD), simultaneous microdistillation-extraction (SMDE), and microwave (MAHD) apparatus. The yields were 0.46% ± 0.03 for the HD and 0.48% ± 0.03 for the MAHD (v/w, volume/dry weight). The oils were analyzed by GC and GC/MS and a total of 58 components were detected. The major compounds in the oils were 1,8-cineole (10.4-17.2%), sabinene (11.6-14.6%), α-terpineol (4.4-5.2%), terpinen-4-ol (2.4-5.7%), and, among sesquiterpenes, γ-eudesinol (8.7-17.9%) and 6S.7R-bisabolone (4.4-14.9%). From a qualitative point of view, no relevant differences between the different methods of isolation were observed, while statistically significant differences on relative percentage were noticed. Oils obtained by HD showed a higher amount of monoterpenoid compounds (69.2%), while L-SMDE, H-SMDE and MAHD were richer in sesquiterpenes (47.9%, 42.7% and 47.6%, respectively).

Chemical Composition of the Essential Oils of Achillea millefolium L. Isolated by Different Distillation Methods

TUBEROSO, CARLO IGNAZIO GIOVANNI;
2009

Abstract

The chemical composition of the essential oil from flowering tops of Achillea millefolium L. isolated by different distillation methods was studied, Samples were hydrodistilled with Clevenger-type (HD), simultaneous microdistillation-extraction (SMDE), and microwave (MAHD) apparatus. The yields were 0.46% ± 0.03 for the HD and 0.48% ± 0.03 for the MAHD (v/w, volume/dry weight). The oils were analyzed by GC and GC/MS and a total of 58 components were detected. The major compounds in the oils were 1,8-cineole (10.4-17.2%), sabinene (11.6-14.6%), α-terpineol (4.4-5.2%), terpinen-4-ol (2.4-5.7%), and, among sesquiterpenes, γ-eudesinol (8.7-17.9%) and 6S.7R-bisabolone (4.4-14.9%). From a qualitative point of view, no relevant differences between the different methods of isolation were observed, while statistically significant differences on relative percentage were noticed. Oils obtained by HD showed a higher amount of monoterpenoid compounds (69.2%), while L-SMDE, H-SMDE and MAHD were richer in sesquiterpenes (47.9%, 42.7% and 47.6%, respectively).
γ-eudesmol; 1,8-cineole; Achillea millefolium; Distillation methods; Essential oil composition; Sabinene
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11584/16699
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