Cited by 87Essential Oils and Antimicrobial ActivityPhase Equilibria and ThermodynamicsEdible Oils Quality and Analysis

Composition and antioxidant activity of Thymus vulgaris volatiles: Comparison between supercritical fluid extraction and hydrodistillation

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Grosso, Clara, Figueiredo, Ana Cristina, Burillo, Jesus, Mainar, Ana M., Urieta, José S., Barroso, José G., Coelho, José A., Palavra, António M. F.·2010·Journal of Separation Science

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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Crossref · 10.1002/jssc.201000192

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Authors
Grosso, C., Figueiredo, A. C., Burillo, J., Mainar, A. M., Urieta, J. S., Barroso, J. G., Coelho, J. A., & Palavra, A. M. F.
Affiliations
  • Instituto Superior Técnico (PT)
  • University of Lisbon (PT)
  • Universidad de Zaragoza (ES)
Venue
Journal of Separation Science
Publisher
Wiley
Published
2010-07
Volume
33
Issue
14
Pages
2211-2218
ISSN
  • 1615-9306 (ISSN-L)
  • 1615-9314
OpenAlex
W2059852761
Cited by
86
References
36
Citations by year
2026: 3 · 2025: 6 · 2024: 6 · 2023: 3 · 2022: 8 · 2021: 6 · 2020: 5 · 2019: 5 · 2017: 4 · 2016: 6 · 2015: 8 · 2014: 6 · 2013: 5 · 2012: 8
FWCI
9.80
Type
journal article
Language
en
Open access
Locations
  • Journal of Separation Science (publishedVersion)
  • PubMed (publishedVersion)
  • Portuguese National Funding Agency for Science, Research and Technology (RCAAP Project by FCT) (submittedVersion, other-oa)
Topics
  • Life Sciences › Agricultural and Biological Sciences › Food Science › Essential Oils and Antimicrobial Activity
  • Physical Sciences › Engineering › Biomedical Engineering › Phase Equilibria and Thermodynamics
  • Physical Sciences › Chemistry › Organic Chemistry › Edible Oils Quality and Analysis
Keywords
thyme, thyme essential oil, volatile oil composition, supercritical fluid extraction, hydrodistillation, extraction method comparison, antioxidant activity, thymoquinone, thymol, carvacrol, p-cymene, linalool, γ-terpinene, Rancimat test
MeSH terms
Antioxidants, Gas Chromatography-Mass Spectrometry, Oils, Volatile, Particle Size, Plant Oils, Chromatography, Supercritical Fluid, Thymus Plant, Distillation

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