Article (Scientific journals)
Chemical composition of essential oils and hydrosols of three Eucalyptus species from Senegal: Eucalyptus alba Renv, Eucalyptus camaldulensis Dehnh and Eucalyptus tereticornis Hook
Barka Ndiaye, El Hadji; Talla Gueye, Momar; Ndiaye, Ibrahima et al.
2017In American Journal of Essential Oils and Natural Products, 5 (1), p. 1-7
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Keywords :
Eucalyptus alba; Eucalyptus camaldulensis; Eucalyptus tereticornis; 1.8-cineole; p-cymene; hydrosol
Abstract :
[en] The leaves of three eucalyptus species Eucalyptus Alba, Eucalyptus camaldulensis and ucalyptus tereticornis were collected in Kaolack (Senegal) and were extracted by steam distillation after 3, 7, 14 and 21 days of drying. The volatile components of aqueous distillates (hydrosols) were obtained by liquid–liquid extraction using n-hexane. The different extracts were analyzed by gas chromatography coupled to a flame ionization detector (GC-FID) and by gas chromatography coupled to a mass spectrometer (GC-MS). Essential oils yields obtained range from 0.3 to 1.6%. E. camaldulensis had the higher yield. Forty four compounds were characterized in E. camaldulensis essential oils. These lasts were dominated by 1.8-cineole (47.54 to 52.47%), limonene (16.5 to 19.1%), α-pinene (7.3 to 11.2%) and p-cymene (6.0 to 8.8%). Fifty compounds were identified in E. Alba oils with 1.8-cineole (36.0-38.3%) α-pinene (19.0-26.4%), limonene (5.7- 8.3%), trans-pinocarveol (3.5 -5.0%) β-pinene (1.9 to 4.6%) as major compounds. In E. tereticornis oils, fifty two compounds were identified. Their composition were dominated by p-cymene (42.49 to 48.51%) followed by 1.8-cineole (21.3- 24.5%), limonene (4.8- 5.9%) and α-pinene (1.9 to 6.7%). The analyzed hydrosols were composed by oxygenated molecules whose major part was found in oils. As essential oils, all corresponding hydrosols hade high rate of 1.8-cineole. E. alba hydrosol contains mainly 1.8-cineole (39.1%), trans-pinocarveol (19.3%), pinocarvone (6.8%). E. camaldulensis hydrosol was dominated by 1.8-cineole (52.6%), α-terpineol (6.6%), cis-p-mentha-1-(7)-8-dien-2ol (5.1%). The major compounds of E. tereticornis hydrolat were: 1.8-cineole (30.7%), α-terpineol (8.8%), trans-pinocarveol (7.6%), carvacrol (7.0%). The results showed that although 1.8-cineole was the main component of the hydrosols of all eucalyptus species, but its relative content was higher in E. camaldulensis.
Disciplines :
Phytobiology (plant sciences, forestry, mycology...)
Chemistry
Author, co-author :
Barka Ndiaye, El Hadji;  Institut de Technologie Alimentaire, Sénégal > Laboratoire des Analyses Phytosanitaires
Talla Gueye, Momar;  Institut de Technologie Alimentaire, Sénégal > Laboratoire des Analyses Phytosanitaires
Ndiaye, Ibrahima;  Université Cheikh Anta Diop, Sénégal > Département de Chimie > Faculté des Sciences et Techniques
Diop, Serigne Mbacké;  Institut de Technologie Alimentaire, Sénégal > Laboratoire des Analyses Phytosanitaires
Diop, Michel Bakar;  Université Gaston Berger, Sénégal > UFR des Sciences Agronomiques, d'Aquaculture et de Technologie Alimentaire (S2ATA),
Fauconnier, Marie-Laure  ;  Université de Liège > Agronomie, Bio-ingénierie et Chimie (AgroBioChem) > Chimie des agro-biosystèmes
Lognay, Georges ;  Université de Liège > Agronomie, Bio-ingénierie et Chimie (AgroBioChem) > Chimie des agro-biosystèmes
Language :
English
Title :
Chemical composition of essential oils and hydrosols of three Eucalyptus species from Senegal: Eucalyptus alba Renv, Eucalyptus camaldulensis Dehnh and Eucalyptus tereticornis Hook
Publication date :
2017
Journal title :
American Journal of Essential Oils and Natural Products
ISSN :
2321-9114
Publisher :
American Journal of Essential Oils and Natural Products
Volume :
5
Issue :
1
Pages :
1-7
Peer reviewed :
Peer Reviewed verified by ORBi
Name of the research project :
« WBI-Sénégal n°2: Production d’huiles essentielles à partir de plantes locales : expérimentation, adaptation et diffusion de technologies »
Funders :
WBI - Wallonie-Bruxelles International [BE]
Available on ORBi :
since 11 May 2017

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