An approach to the static–dynamic subcritical water extraction of laurel essential oil: comparison with conventional techniques

The Analyst ◽  
2000 ◽  
Vol 125 (3) ◽  
pp. 481-485 ◽  
Author(s):  
Virginia Fernández-Pérez ◽  
Maria M. Jiménez-Carmona ◽  
M. Dolores Luque de Castro
Keyword(s):  
Essential Oil ◽  
Subcritical Water ◽  
Water Extraction ◽  
Subcritical Water Extraction

Optimization studies and compositional analysis of subcritical water extraction of essential oil from Citrus hystrix DC. leaves

2021 ◽  
pp. 105384
Author(s):  
Noor Amirah Abdul Halim ◽  
Zurina Zainal Abidin ◽  
Shamsul Izhar Siajam ◽  
Chong Gun Hean ◽  
Mohd Razif Harun
Keyword(s):  
Essential Oil ◽  
Subcritical Water ◽  
Compositional Analysis ◽  
Water Extraction ◽  
Subcritical Water Extraction

Subcritical water extraction of essential oil from Aquilaria malaccensis leaves

2019 ◽  
Vol 55 (15) ◽  
pp. 2779-2798 ◽  
Author(s):  
M. Samadi ◽  
Z. Zainal Abidin ◽  
H. Yoshida ◽  
R. Yunus ◽  
D.R. Awang Biak ◽  
...  
Keyword(s):  
Essential Oil ◽  
Subcritical Water ◽  
Water Extraction ◽  
Subcritical Water Extraction ◽  
Aquilaria Malaccensis

scholarly journals Towards Higher Oil Yield and Quality of Essential Oil Extracted from Aquilaria malaccensis Wood via the Subcritical Technique

Molecules ◽  
2020 ◽  
Vol 25 (17) ◽  
pp. 3872
Author(s):  
M. Samadi ◽  
Z. Zainal Abidin ◽  
H. Yoshida ◽  
R. Yunus ◽  
D. R. Awang Biak
Keyword(s):  
Essential Oil ◽  
Processing Time ◽  
Subcritical Water ◽  
Value Added ◽  
Extraction Process ◽  
Water Extraction ◽  
Subcritical Water Extraction ◽  
Yield And Quality ◽  
Aquilaria Malaccensis

A method that delivers a high yield and excellent quality of essential oil, which retains most of its value-added compounds, and undergoes least change after the extraction process, is greatly sought after. Although chemical free methods are acceptable, they call for an extensive processing time, while the yield and quality from these methods are often disappointing. This work utilizes subcritical water technology to address these issues. In this undertaking, essential oil was extracted from Aquilaria malaccensis wood by way of subcritical conditions, and characterized through gas chromatography/mass spectroscopy (GC/MS). Optimization through response surface methodology revealed temperature to be the most critical factor for the extraction process, while the optimum conditions for temperature, sample-to-solvent ratio, and time for subcritical water extraction was revealed as 225 °C, 0.2 gr/mL, and 17 min, respectively. The subcritical water extraction technique involves two simultaneous processes, which are based on good fitting to the two-site kinetic and second order model. In comparison to the hydrodistillation method, GC/MS results indicated that the quality of A. malaccensis’ wood oils, derived through the subcritical water technique, are of significantly better quality, while containing many constructive value-added compounds, such as furfural and guaiacol, which are useful for the production of pesticides and medicines. Pore size, functional groups, and morphology analysis revealed the occurrence of substantial damage to the samples, which facilitated an improved extraction of bio-products. In comparison to conventional methods, the use of the subcritical method not only involves a shorter processing time, but also delivers a higher oil yield and quality.

SUBCRITICAL WATER EXTRACTION OF ESSENTIAL OILS FROMZATARIA MULTIFLORABOISS

2009 ◽  
Vol 32 (6) ◽  
pp. 804-816 ◽  
Author(s):  
M. KHAJENOORI ◽  
A. HAGHIGHI ASL ◽  
F. HORMOZI ◽  
M.H. EIKANI ◽  
H. NOORI BIDGOLI
Keyword(s):  
Essential Oils ◽  
Subcritical Water ◽  
Water Extraction ◽  
Subcritical Water Extraction

Optimization of subcritical water extraction of phenolic antioxidants from pomegranate (Punica granatum L.) peel by response surface methodology

2017 ◽  
Vol 9 (32) ◽  
pp. 4647-4656 ◽  
Author(s):  
Linlin Yan ◽  
Yungang Cao ◽  
Guangyao Zheng
Keyword(s):  
Response Surface Methodology ◽  
Subcritical Water ◽  
Punica Granatum ◽  
Water Extraction ◽  
Phenolic Antioxidants ◽  
Subcritical Water Extraction ◽  
Extraction Technology ◽  
Pomegranate Peel ◽  
Efficient Extraction ◽  
Punica Granatum L

Subcritical water extraction (SWE), a ‘green’ and efficient extraction technology, was applied to extract phenolic antioxidants from pomegranate peel in this study.

scholarly journals Structural Changes in Milled Wood Lignin (MWL) of Chinese Quince (Chaenomeles sinensis) Fruit Subjected to Subcritical Water Treatment

Molecules ◽  
2021 ◽  
Vol 26 (2) ◽  
pp. 398
Author(s):  
Wen-Yue Wang ◽  
Zhao Qin ◽  
Hua-Min Liu ◽  
Xue-De Wang ◽  
Jing-Hao Gao ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Water Treatment ◽  
Quantum Coherence ◽  
Structural Changes ◽  
31P Nmr ◽  
Subcritical Water ◽  
Water Extraction ◽  
Subcritical Water Extraction ◽  
Milled Wood Lignin ◽  
Chinese Quince

Subcritical water treatment has received considerable attention due to its cost effectiveness and environmentally friendly properties. In this investigation, Chinese quince fruits were submitted to subcritical water treatment (130, 150, and 170 °C), and the influence of treatments on the structure of milled wood lignin (MWL) was evaluated. Structural properties of these lignin samples (UL, L130, L150, and L170) were investigated by high-performance anion exchange chromatography (HPAEC), FT-IR, gel permeation chromatography (GPC), TGA, pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS), 2D-Heteronculear Single Quantum Coherence (HSQC) -NMR, and 31P-NMR. The carbohydrate analysis showed that xylose in the samples increased significantly with higher temperature, and according to molecular weight and thermal analysis, the MWLs of the pretreated residues have higher thermal stability with increased molecular weight. The spectra of 2D-NMR and 31P-NMR demonstrated that the chemical linkages in the MWLs were mainly β-O-4′ ether bonds, β-5′ and β-β′, and the units were principally G- S- H- type with small amounts of ferulic acids; these results are consistent with the results of Py-GC/MS analysis. It is believed that understanding the structural changes in MWL caused by subcritical water treatment will contribute to understanding the mechanism of subcritical water extraction, which in turn will provide a theoretical basis for developing the technology of subcritical water extraction.

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