The deep impacting microwave irradiation on the quality and antioxidant capacity of rosemary essential oils obtained by solvent-free microwave extraction

2021 ◽  
pp. 1-9
Author(s):  
Dalila Meziane-Assami ◽  
Zahia Ghouila ◽  
Karim Assami ◽  
Brahim Y. Meklati ◽  
Farid Chemat
Keyword(s):  
Microwave Irradiation ◽  
Essential Oils ◽  
Antioxidant Capacity ◽  
Solvent Free ◽  
Microwave Extraction

scholarly journals Antibacterial Activities of Essential Oils Extracted from Leaves of Murraya koenigii by Solvent-Free Microwave Extraction and Hydro-Distillation

2012 ◽  
Vol 7 (1) ◽  
pp. 1934578X1200700 ◽  
Author(s):  
Naciye Erkan ◽  
Zhou Tao ◽  
H. P. Vasantha Rupasinghe ◽  
Burcu Uysal ◽  
Birsen S. Oksal
Keyword(s):  
Essential Oil ◽  
Essential Oils ◽  
Radical Scavenging ◽  
Antibacterial Activities ◽  
Solvent Free ◽  
Microwave Extraction ◽  
Murraya Koenigii ◽  
Inhibition Of Growth ◽  
Germacrene D ◽  
Dpph Radical Scavenging

Solvent-free microwave extraction (SFME) for the isolation of essential oil from leaves of Murraya koenigii L. (Rutaceae) has been compared with the conventional hydro-distilled oil (HD) in terms of yield, composition, antioxidant activity, and antibacterial activity against Listeria innocua. The yield of essential oil obtained from 30 min of SFME was similar to that of HD for 180 min. By GC-MS analysis, the major compounds of the essential oil extracted by SFME, which were obtained in somewhat lower amounts than in the essential oil obtained by HD, were α-copaene (44.3%), β-gurjunene (25.5%), isocaryophyllene (12.1%), β-caryophyllene (8.7%) and germacrene D (2.9%). The content of oxygenated terpenes, slightly higher for the SFME-essential oil (2.3%) than the HD-essential oil (1.4%), were much lower than that of nonoxygenated terpenes in both oils. DPPH radical scavenging activities of both essential oils were relatively low (10%-24%). Complete inhibition of growth of L. innocua was observed with both SFME and HD essential oils, at 400 and 600 μg/mL (minimum inhibitory concentration), respectively. The SFME-essential oil at 300 μg/mL provided 92% inhibition, indicating its potential as a natural antimicrobial agent.

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 Study of Essential Oils Extracted from Egyptian Basil Leaves (Ocimum basilicum L.) Using Hydro-Distillation and Solvent-Free Microwave Extraction

Molecules ◽  
2016 ◽  
Vol 21 (1) ◽  
pp. 113 ◽  
Author(s):  
Mohammed Chenni ◽  
Douniazad El Abed ◽  
Njara Rakotomanomana ◽  
Xavier Fernandez ◽  
Farid Chemat
Keyword(s):  
Comparative Study ◽  
Essential Oils ◽  
Ocimum Basilicum ◽  
Solvent Free ◽  
Microwave Extraction

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.

Solvent-free Microwave Extraction as the Useful Tool for Extraction of Edible Essential Oils

2016 ◽  
Vol 10 (2) ◽  
pp. 213-218 ◽  
Author(s):  
Heri Kusuma ◽  
◽  
Ditta Putri ◽  
Intan Dewi ◽  
Mahfud Mahfud ◽  
...  
Keyword(s):  
Essential Oils ◽  
Atmospheric Pressure ◽  
Good Alternative ◽  
Green Technology ◽  
Solvent Free ◽  
Gas Chromatography Mass Spectrometry ◽  
Microwave Extraction ◽  
Dry Distillation ◽  
Pharmaceutical Industries ◽  
Comparison Of The Results

Solvent-free microwave extraction (SFME) is proposed as a method for “green” extraction of edible essential oils extensively used in the fragrance, flavour, and pharmaceutical industries and also in aromatherapy. It is a combination of microwave heating and dry distillation, performed at atmospheric pressure without adding any solvent or water. Isolation and concentration of volatile compounds are performed by a single stage. Basil (Ocimum basilicum L.) was extracted with SFME at atmospheric pressure and 373 K for 30 min. The extracted compounds were removed from the aqueous extract by simple decantation, identified by gas chromatography–mass spectrometry (GC-MS). Hydrodistillation (HD) of basil was performed with 400 ml of water for 4.5 h for comparison of the results with those provided by the proposed method. SFME method offers important advantages over HD, viz. shorter extraction times (30 min vs. 4.5 h); better yields (0.13 % vs. 0.11 %); environmental impact (energy cost is appreciably higher for performing HD than that required for rapid SFME), cleaner features (as no residue generation and no water or solvent used); and provides a more valuable essential oil. SFME is a green technology and appears as a good alternative for the extraction of edible essential oils from aromatic plants used in aromatherapy and food industry.

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