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Composition and antioxidant activity of Thymus vulgaris volatiles: comparison between supercritical fluid extraction and hydrodistillation.
J Sep Sci. 2010 Jul; 33(14):2211-8.JS

Abstract

Supercritical fluid extraction (SFE) of the volatile oil from Thymus vulgaris L. aerial flowering parts was performed under different conditions of pressure, temperature, mean particle size and CO(2) flow rate and the correspondent yield and composition were compared with those of the essential oil isolated by hydrodistillation (HD). Both the oils were analyzed by GC and GC-MS and 52 components were identified. The main volatile components obtained were p-cymene (10.0-42.6% for SFE and 28.9-34.8% for HD), gamma-terpinene (0.8-6.9% for SFE and 5.1-7.0% for HD), linalool (2.3-5.3% for SFE and 2.8-3.1% for HD), thymol (19.5-40.8% for SFE and 35.4-41.6% for HD), and carvacrol (1.4-3.1% for SFE and 2.6-3.1% for HD). The main difference was found to be the relative percentage of thymoquinone (not found in the essential oil) and carvacryl methyl ether (1.0-1.2% for HD versus t-0.4 for SFE) which can explain the higher antioxidant activity, assessed by Rancimat test, of the SFE volatiles when compared with HD. Thymoquinone is considered a strong antioxidant compound.

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Publisher Full Text (DOI)

Authors+Show Affiliations

Grosso C
Departamento de Engenharia Química e Biológica, IST, Lisboa, Portugal. clara.f.grosso@ist.utl.pt
Figueiredo AC
No affiliation info available
Burillo J
No affiliation info available
Mainar AM
No affiliation info available
Urieta JS
No affiliation info available
Barroso JG
No affiliation info available
Coelho JA
No affiliation info available
Palavra AM
No affiliation info available

MeSH

AntioxidantsChromatography, Supercritical FluidDistillationGas Chromatography-Mass SpectrometryOils, VolatileParticle SizePlant OilsThymus Plant

Pub Type(s)

Comparative Study
Evaluation Study
Journal Article

Language

eng

PubMed ID

20568253

Citation

Grosso, Clara, et al. "Composition and Antioxidant Activity of Thymus Vulgaris Volatiles: Comparison Between Supercritical Fluid Extraction and Hydrodistillation." Journal of Separation Science, vol. 33, no. 14, 2010, pp. 2211-8.
Grosso C, Figueiredo AC, Burillo J, et al. Composition and antioxidant activity of Thymus vulgaris volatiles: comparison between supercritical fluid extraction and hydrodistillation. J Sep Sci. 2010;33(14):2211-8.
Grosso, C., Figueiredo, A. C., Burillo, J., Mainar, A. M., Urieta, J. S., Barroso, J. G., Coelho, J. A., & Palavra, A. M. (2010). Composition and antioxidant activity of Thymus vulgaris volatiles: comparison between supercritical fluid extraction and hydrodistillation. Journal of Separation Science, 33(14), 2211-8. https://doi.org/10.1002/jssc.201000192
Grosso C, et al. Composition and Antioxidant Activity of Thymus Vulgaris Volatiles: Comparison Between Supercritical Fluid Extraction and Hydrodistillation. J Sep Sci. 2010;33(14):2211-8. PubMed PMID: 20568253.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Composition and antioxidant activity of Thymus vulgaris volatiles: comparison between supercritical fluid extraction and hydrodistillation. AU - Grosso,Clara, AU - Figueiredo,Ana Cristina, AU - Burillo,Jesus, AU - Mainar,Ana M, AU - Urieta,José S, AU - Barroso,José G, AU - Coelho,José A, AU - Palavra,António M F, PY - 2010/6/23/entrez PY - 2010/6/23/pubmed PY - 2010/10/20/medline SP - 2211 EP - 8 JF - Journal of separation science JO - J Sep Sci VL - 33 IS - 14 N2 - Supercritical fluid extraction (SFE) of the volatile oil from Thymus vulgaris L. aerial flowering parts was performed under different conditions of pressure, temperature, mean particle size and CO(2) flow rate and the correspondent yield and composition were compared with those of the essential oil isolated by hydrodistillation (HD). Both the oils were analyzed by GC and GC-MS and 52 components were identified. The main volatile components obtained were p-cymene (10.0-42.6% for SFE and 28.9-34.8% for HD), gamma-terpinene (0.8-6.9% for SFE and 5.1-7.0% for HD), linalool (2.3-5.3% for SFE and 2.8-3.1% for HD), thymol (19.5-40.8% for SFE and 35.4-41.6% for HD), and carvacrol (1.4-3.1% for SFE and 2.6-3.1% for HD). The main difference was found to be the relative percentage of thymoquinone (not found in the essential oil) and carvacryl methyl ether (1.0-1.2% for HD versus t-0.4 for SFE) which can explain the higher antioxidant activity, assessed by Rancimat test, of the SFE volatiles when compared with HD. Thymoquinone is considered a strong antioxidant compound. SN - 1615-9314 UR - https://www.unboundmedicine.com/medline/citation/20568253/Composition_and_antioxidant_activity_of_Thymus_vulgaris_volatiles:_comparison_between_supercritical_fluid_extraction_and_hydrodistillation_ L2 - https://doi.org/10.1002/jssc.201000192 DB - PRIME DP - Unbound Medicine ER -