Chemical Composition of Essential Oil of Stachys pilifera Benth by Hydrodistillation, Head Space-Solid Phase Microextraction and Solvent Free Microwave Extraction Methods and QSRR Evaluation

The chemical composition of essential oil and volatile obtained from the roots ofJatropha ribifolia(Pohl) Baill was performed in this work. The Clevenger extractor was utilized in hydrodistillation of oil and chemical composition determined by gas chromatography coupled with mass spectrometry detector (GC-MS). The identification of compounds was confirmed by retention index (Kovats index) obtained from a series of straight chain alkanes (C7–C30) and by comparison with NIST and ADAMS library. A total of 61 compounds were identified in essential oil by GC-MS. The extraction of volatile was performed also by the use of the solid phase microextraction (SPME) with four different fibers. The essential oil extraction was extremely rapid (15 s) to avoid saturation of the fiber and the MS detector. The majority of the composition of essential oil is the terpenes:β-pinene (major compound 9.16%),β-vatirene (8.34%),α-gurjunene (6.98%),α-pinene (6.35%), camphene (4.34%), tricyclene (3.79%) and dehydro aromadendrene (3.52%) it and aldehydes and alcohols. Through the SPME it was possible to determine the nine volatile compounds not identified in oil 2,3,4-trimethyl-2-cyclopenten-1-one,α-phellandrene, 3-carene, trans-p-mentha-2,8-dienol, pinocamphone, D-verbenon, 1,3,3-trimethyl-2-(2-methyl-cyclopropyl)-cyclohexene, 2,4-diisocyanato-1-methylbenzene, and (6-hydroxymethyl-2,3-dimethylehenyl) methanol.

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The chemical composition of the essential oil and volatile compounds from caraway fruit (Carum carvi L.) extracted by headspace-solid phase microextraction and the antioxidant activity

Advanced technologies ◽

10.5937/savteh2001037g ◽

2020 ◽

Vol 9 (1) ◽

pp. 37-43

Author(s):

Ivana Gajić ◽

Ljiljana Stanojević ◽

Ana Dinić ◽

Jelena Stanojević ◽

Ljubiša Nikolić ◽

...

Keyword(s):

Antioxidant Activity ◽

Chemical Composition ◽

Essential Oil ◽

Volatile Compounds ◽

Solid Phase Microextraction ◽

Solid Phase ◽

Headspace Solid Phase Microextraction ◽

Carum Carvi

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Comparative Evaluation of Essential Oils of Helichrysum petiolare Hilliard & B.L. Burtt Obtained from Solvent-Free Microwave and Hydrodistillation Extraction Methods

Asian Journal of Chemistry ◽

10.14233/ajchem.2020.22698 ◽

2020 ◽

Vol 32 (12) ◽

pp. 3227-3238

Author(s):

A.E. Aladejana ◽

G. Bradley ◽

A.J. Afolayan

Keyword(s):

Essential Oil ◽

Essential Oils ◽

Comparative Evaluation ◽

Extraction Method ◽

Chemical Constituents ◽

Extraction Methods ◽

Solvent Free ◽

Microwave Extraction ◽

Deep Yellow ◽

Method Of Extraction

Till date, no study has ever looked into the effect of extraction method on the chemical constituents of the essential oil of Helichrysum petiolare. This study therefore evaluated the effect of hydrodistillation and solvent free microwave extraction (SFME) methods on the chemical constituents of H. petiolare derived essential oils. The SFME derived essential oil was deep yellow and of higher yield than the pale yellow essential oil obtained through the hydrodistillation. There were substantial amounts of monoterpenes, monoterpene alcohols, sesquiterpenes, and sesquiterpene alcohols in both essential oils obtained. The SFME derived essential oil had 62 compounds as against the 52 derived through hydrodistillation. The SFME derived essential oil can therefore be suggested to be of better quality than of the hydrodistillation method. The compounds obtained in the essential oils have high pharmaceutical and cosmetic values, and as observed in this study, their quantity is dependent on method of extraction.

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GC-MS Profile of Volatile Oils Extracted from Jatropha multifida L. using Hydrodistillation and Solvent-Free Microwave Extraction Methods

Asian Journal of Chemistry ◽

10.14233/ajchem.2019.21338 ◽

2019 ◽

Vol 31 (5) ◽

pp. 1143-1148

Author(s):

O.A. Wintola ◽

E.O. Ajayi ◽

A.J. Afolayan

Keyword(s):

Essential Oil ◽

Food Additives ◽

Extraction Methods ◽

Solvent Free ◽

Gas Chromatography Mass Spectrometry ◽

Microwave Extraction ◽

Volatile Oils ◽

Oxygenated Compounds ◽

Method Of Extraction ◽

Jatropha Multifida

Volatile oils were extracted from the leaves of Jatropha multifida using solvent free microwave and hydrodistillation methods and the oils obtained were analyzed by gas chromatography-mass spectrometry (GC-MS). The major compound as observed is eucalyptol with 70.38 and 35.62 % for solvent-free microwave extraction (SME) and hydrodistillation extraction (HDE), respectively. The oil compositions were dominated by oxygenated compounds. Oxygenated monoterpenes were prevalent in contrast to monoterpenes hydrocarbons. The oils were also characterized by oxygenated sesquiterpenes (SME, 6.05 %; HDE, 7.34 %). This study may provide information on a suitable method of extraction of the essential oil for industrial application and may assist in the realization of the essential oil as a natural source of plant and animal food additives. These various bioactive compounds in the essential oil may partially justify their use in folklore medicine.

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