Data from: Comparative chemical analysis of volatile compounds of Echinops ilicifolius using hydrodistillation and headspace solid-phase microextraction and the antibacterial activities of its essential oil

The volatile compounds from various parts of Echinops ilicifolius
(Compositae) such as flowers, leaves and roots obtained by
hydrodistillation (HD) and headspace solid-phase microextraction (HS-SPME)
methods were subsequently analysed by GC and GC/MS and compared.
Thirty-seven and 20 components of the flower of E. ilicifolius were
characterized, representing 99.7% and 100.0% of the total compositions
using the HD and HS-SPME methods, respectively. The major constituents of
the hydrodistilled oil were identified as linalool (58.6%), geraniol
(17.4%), n-dodecane (10.9%) and nerol (5.4%), whereas HS-SPME extract was
rich in n-octane (34.0%), n-decane (25.1%), p-cymene (11.1%), γ-terpinene
(5.3%) and 1,8-cineole (5.1%). n-Hexadecanoic acid (32.3%), linalool
(16.4%) and geraniol (8.3%) were the main components among 43 constituents
identified in hydrodistilled extract of the leaf, representing 99.5% of
the total components detected, whereas 16 compounds representing 99.9% of
the HS-SPME method were identified, among which n-decane (32.6%), p-cymene
(14.0%), n-octane (10.3%), limonene (9.2%), γ-terpinene (9.1%),
1,8-cineole (7.9%) and α-pinene (5.9%) were the major ones. Among 23
components comprising 91.2% of the total hydrodistilled oil detected,
n-decane (23.1%), n-dodecane (14.5%), silphiperfol-4,7(14)-diene (11.1%),
selin-11-en-4-a-ol (9.5%), n-hexadecanoic acid (7.8%) and n-tetradecane
(5.3%) were the main constituents in the root of E. ilicifolius, whereas
1,8-cineole (29.0%), n-decane (12.6%), n-octane (12.6%), camphor (12.0%),
p-cymene (9.6%) and γ-terpinene (5.9%) were the main components among the
20 constituents characterized in HS-SPME extract, representing 99.9% of
the total components detected. The antibacterial activity of the flower,
leaf and root oils of E. ilicifolius against six Gram-positive and
Gram-negative bacteria was determined using the MIC method. The growth
inhibitory zone (mm) was also measured.