scholarly journals Solvent–free Microwave Extraction of Essential Oils from Laurus nobilis and Melissa officinalis: Comparison with Conventional Hydro-distillation and Ultrasound Extraction

2010 ◽  
Vol 5 (1) ◽  
pp. 1934578X1000500 ◽  
Author(s):  
Burcu Uysal ◽  
Fazli Sozmen ◽  
Birsen S. Buyuktas
Keyword(s):  
Essential Oils ◽  
Extraction Methods ◽  
Solvent Free ◽  
Microwave Extraction ◽  
Melissa Officinalis ◽  
Laurus Nobilis ◽  
Ultrasound Assisted Extraction ◽  
Plant Materials ◽  
Oxygenated Compounds ◽  
Assisted Extraction

Solvent-free microwave extraction (SFME) has been applied to the extraction of essential oils from Melissa officinalis L. and Laurus nobilis L. The results of SFME were compared with those obtained by hydrodistillation (HD) and ultrasound-assisted extraction (USE) of essential oils from dried plant materials. The compositions of the essential oils were identified by GC–MS. The essential oil obtained with SFME contained substantially higher amounts of oxygenated compounds and lower amounts of monoterpenes than the oils obtained by conventional methods. The three different extraction methods used showed differences in the compositions and contents of the essential oils.

scholarly journals Chemical Composition of Essential Oils Obtained from Heteromorpha arborescens (Spreng.) Cham. and Schltdl Leaves Using Two Extraction Methods

2020 ◽  
Vol 2020 ◽  
pp. 1-6
Author(s):  
Taiwo Oluwafunmilola Abifarin ◽  
Gloria Aderonke Otunola ◽  
Anthony Jide Afolayan
Keyword(s):  
Essential Oil ◽  
Essential Oils ◽  
Co2 Emission ◽  
Chemical Constituents ◽  
Solvent Free ◽  
Oil Yield ◽  
Chemical Components ◽  
Chemical Compositions ◽  
Microwave Extraction ◽  
Oxygenated Compounds

This study was aimed at comparing the essential oils obtained from Heteromorpha arborescens leaves by Solvent-Free Microwave Extraction (SFME) and Hydrodistillation (HD) methods in terms of their chemical compositions, yield, CO2 emission, and energy consumption. The solvent-free microwave extraction method indicated a higher oil yield of 0.7 mL/200 g (0.35%) as compared to 0.59 mL/200 g (0.295%) obtained through hydrodistillation. GC-MS analysis of the oils revealed a total of 52 chemical components from both methods with the presence of 35 (96.52%) and 30 (71.15%) chemical constituents for HD and SFME, respectively. The major constituents observed in the essential oil extracted by SFME methods include α-pinene (6%), D-limonene (11.27%), β-ocimene (9.09%), β-phellandrene (6.33%), β-mycene (8.49%), caryophyllene (5.96%), and camphene (4.28%). However, in the hydrodistillation method, the oil was majorly composed of a-pinene (4.41%), β-pinene (10.68%), β-ocimene (6.30%), germacrene-D (5.09%), humulene (5.55%), and α-elemene (6.18%). The SFME method was better in terms of saving energy (0.25 kWh against 4.2 kWh of energy consumed), reduced CO2 emission (200 g against 3360 g of CO2), a higher yield, and better quality of essential oil due to the presence of higher valuable oxygenated compounds (8.52%) against that of the hydrodistillation method (2.96%). The SFME method is, therefore, a good alternative for extracting the oils of H. arborescens leaves since the essential oil yield is higher with more oxygenated compounds, considerable energy savings, lower cost, and reduced environmental burden at substantially reduced extraction time (30 min as opposed to 180 min).

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

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.

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

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.

Solvent-free microwave extraction of essential oils from Thymus vulgaris L. and Melissa officinalis L.

2018 ◽  
Vol 119 ◽  
pp. 214-217 ◽  
Author(s):  
Golchehreh Khalili ◽  
Ali Mazloomifar ◽  
Kambiz Larijani ◽  
Mohammad Saber Tehrani ◽  
Parviz Aberoomand Azar
Keyword(s):  
Essential Oils ◽  
Solvent Free ◽  
Thymus Vulgaris ◽  
Microwave Extraction ◽  
Melissa Officinalis

scholarly journals Solvent-Free Microwave Extraction of Thymus mastichina Essential Oil: Influence on Their Chemical Composition and on the Antioxidant and Antimicrobial Activities

2021 ◽  
Vol 14 (8) ◽  
pp. 709
Author(s):  
André R. T. S. Araujo ◽  
Sandrine Périno ◽  
Xavier Fernandez ◽  
Cassandra Cunha ◽  
Márcio Rodrigues ◽  
...  
Keyword(s):  
Essential Oil ◽  
Essential Oils ◽  
Large Scale ◽  
Steam Distillation ◽  
Extraction Methods ◽  
Antimicrobial Activities ◽  
Solvent Free ◽  
Microwave Extraction ◽  
Dry Distillation ◽  
Antioxidant And Antimicrobial Activities

Solvent-free microwave extraction (SFME) is a combination of microwave heating and dry distillation performed at atmospheric pressure without the addition of water or organic solvents that has been proposed as a green method for the extraction of essential oils from aromatic and medicinal herbs. In this work, SFME and the conventional techniques of steam distillation (SD) and hydrodistillation (HD) were compared with respect to the extraction and antioxidant and antimicrobial activities of Thymus mastichina essential oil. The main constituent of essential oils obtained using different methods was 1,8-cineole (eucalyptol). The results showed that the essential oils extracted by means of SFME in 30 min were quantitatively (yield) and qualitatively (aromatic profile) similar to those obtained using conventional HD over 120 min. In addition, SFME generates less waste and less solvent, consumes less energy, and provides a higher yield for a shorter extraction time, which is advantageous for the extraction of the T. mastichina essential oil compared to SD. The antioxidant and antimicrobial activities of the T. mastichina essential oil obtained from either SFME or conventional extraction methods (SD or HD) showed a similar pattern. Large-scale experiments using this SFME procedure showed a potential industrial application.

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