Exploration of a ternary deep eutectic solvent for the efficient extraction of plantamajoside, acteoside, quercetin and kaempferol from Plantago asiatica L.

2021 ◽  
Author(s):  
Huiling Guo ◽  
Chuanhua Feng ◽  
Lvjiang Hu ◽  
Xiaojuan Zhao ◽  
Xiaolin Tang ◽  
...  
Keyword(s):  
Deep Eutectic Solvent ◽  
Plantago Asiatica ◽  
Efficient Extraction

scholarly journals Green and Efficient Extraction of Polysaccharides From Poria cocos F.A. Wolf by Deep Eutectic Solvent

2020 ◽  
Vol 15 (2) ◽  
pp. 1934578X1990070 ◽  
Author(s):  
Weida Zhang ◽  
Shaobo Cheng ◽  
Xiaona Zhai ◽  
Junshe Sun ◽  
Xuefang Hu ◽  
...  
Keyword(s):  
Choline Chloride ◽  
Deep Eutectic Solvent ◽  
Deep Eutectic Solvents ◽  
Extraction Yield ◽  
Hot Water ◽  
Poria Cocos ◽  
Extraction Solvent ◽  
Molecular Weight Distributions ◽  
Efficient Extraction ◽  
Run Test

Deep eutectic solvents (DESs) were proposed for the extraction of polysaccharides from Poria cocos (PCPs). Six types of DESs were prepared, and the DES composed of choline chloride and oxalic acid was proved to be suitable. Based on the results of single-factor test, the Box-Behnken experimental design with response surface methodology was carried out, giving the optimal extraction conditions including mole ratio of 1:2 (choline chloride:oxalic acid) and extraction 15 minutes at 100°C. Under the optimal extraction conditions, the extraction yield (46.24% ± 0.13%) was 8.6 times higher than that of hot water. The reusability of DES was demonstrated by a 6-run test, and an extraction yield of PCP was 38.40% ± 0.23% after reusing for 6 times without adding any additional chemicals. Moreover, molecular weight distributions of the resulting PCP were analyzed, and then mainly distributed in the range of 753 to 3578 g/mol. Therefore, DESs were proved to be an excellent extraction solvent alternative to the extraction of PCP.

scholarly journals Structural elucidation of lignins from corncob acid hydrolysis residue by enzymatic mild acidolysis and deep eutectic solvent pretreatment

BioResources ◽  
2020 ◽  
Vol 15 (2) ◽  
pp. 4362-4372
Author(s):  
Na Li ◽  
Chao Cao ◽  
Lupeng Shao ◽  
Chao Wang ◽  
Yu Liu ◽  
...  
Keyword(s):  
Acid Hydrolysis ◽  
31P Nmr ◽  
Structural Characteristics ◽  
Choline Chloride ◽  
Deep Eutectic Solvent ◽  
Gel Permeation Chromatography ◽  
Structural Features ◽  
Molar Ratio ◽  
Efficient Extraction ◽  
Hydrolysis Residue

Achieving mild and efficient extraction of high purity lignin from corncob acid hydrolysis residue is essential for efficient lignin application. In this study, enzymatic/mild acidolysis lignin (EMAL) and deep eutectic solvent (DES)-lignin were extracted from corncob acid hydrolysis residue. The structural features of the two lignin fractions were investigated by Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), gel permeation chromatography (GPC), and 31P-nuclear magnetic resonance (31P-NMR). The highest DES-lignin yield of 58.8 wt% was achieved at 120 °C with a choline chloride-to-lactic acid (ChCl-to-Lac) molar ratio of 1:10 and a reaction time of 12 h. The FTIR analysis indicated a higher amount of guaiacyl units in EMAL than DES-lignin. Furthermore, condensation and fragmentation occurred simultaneously under DES pretreatment, but the fragmentation reaction was dominant. The structural characteristics investigated will allow for more effective lignin usage.

scholarly journals Polyphenol Extraction from Humulus lupulus (Hop) Using a Neoteric Glycerol/L-Alanine Deep Eutectic Solvent: Optimisation, Kinetics and the Effect of Ultrasound-Assisted Pretreatment

2019 ◽  
Vol 1 (3) ◽  
pp. 403-417 ◽  
Author(s):  
Achillia Lakka ◽  
Ioanna Karageorgou ◽  
Olga Kaltsa ◽  
Georgia Batra ◽  
Eleni Bozinou ◽  
...  
Keyword(s):  
Elevated Temperatures ◽  
Deep Eutectic Solvent ◽  
Dry Mass ◽  
Box Behnken Design ◽  
Solid Ratio ◽  
Efficient Extraction ◽  
Polyphenol Extraction ◽  
Kinetic Pattern ◽  
Natural Deep Eutectic Solvent ◽  
Increasing Temperature

The investigation presented herein had as its scope the development of an integrated process for the efficient extraction of polyphenols from hop. For this purpose, a novel, natural deep eutectic solvent (DES) was synthesised, composed of glycerol and L-alanine, and the process was optimised by deploying a response surface methodology based on a Box–Behnken design. The variables considered were the DES/water proportion, the liquid-to-solid ratio and the stirring speed. Under the optimised conditions, the yield in total polyphenols achieved was 118.97 ± 8.27 mg gallic acid equivalents per g of dry mass. Ultrasonication, incorporated into the process as a pretreatment step, was shown to significantly change the kinetic pattern of polyphenol extraction and contributed to attaining higher yields only at 80 °C, whereas at lower temperatures a supressing effect was observed. Furthermore, increasing temperature was negatively correlated with the second-order extraction rates, evidencing a slow-down of the extraction rate at elevated temperatures.

scholarly journals Efficient extraction of bioactive flavonoids from Celtis sinensis leaves using deep eutectic solvent as green media

RSC Advances ◽  
2021 ◽  
Vol 11 (29) ◽  
pp. 17924-17935
Author(s):  
Lei Wang ◽  
Xianying Fang ◽  
Yang Hu ◽  
Yiwei Zhang ◽  
Zhipeng Qi ◽  
...  
Keyword(s):  
Natural Products ◽  
Organic Solvents ◽  
Deep Eutectic Solvent ◽  
Efficient Extraction ◽  
Celtis Sinensis

In recent years, deep eutectic solvent (DES) has attracted comprehensive attention on the extraction of natural products, and is regarded as an alternative to traditional organic solvents for the environmental advantages.

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